512Mb, 1.8V, Multiple I/O Serial Flash Memory
Features
Micron Serial NOR Flash Memory
1.8V, Multiple I/O, 4KB Sector Erase
N25Q512A
Features
•
•
•
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•
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•
•
•
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•
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• Write protection
– Software write protection applicable to every
64KB sector via volatile lock bit
– Hardware write protection: protected area size
defined by five nonvolatile bits (BP0, BP1, BP2,
BP3, and TB)
– Additional smart protections, available upon request
• Electronic signature
– JEDEC-standard 2-byte signature (BB20h)
– Unique ID code (UID): 17 read-only bytes,
including: Two additional extended device ID
bytes to identify device factory options; and customized factory data (14 bytes)
• Minimum 100,000 ERASE cycles per sector
• More than 20 years data retention
• Packages – JEDEC-standard, all RoHS-compliant
– V-PDFN-8/8mm x 6mm (also known as SON,
DFPN, MLP, MLF)
– SOP2-16/300mils (also known as SO16W, SO16Wide, SOIC-16)
– T-PBGA-24b05/6mm x 8mm (also known as
TBGA24)
Stacked device (two 256Mb die)
SPI-compatible serial bus interface
Double transfer rate (DTR) mode
1.7–2.0V single supply voltage
108 MHz (MAX) clock frequency supported for all
protocols in single transfer rate (STR) mode
54 MHz (MAX) clock frequency supported for all
protocols in DTR mode
Dual/quad I/O instruction provides increased
throughput up to 54 MB/s
Supported protocols
– Extended SPI, dual I/O, and quad I/O
– DTR mode supported on all
Execute-in-place (XIP) mode for all three protocols
– Configurable via volatile or nonvolatile registers
– Enables memory to work in XIP mode directly after power-on
PROGRAM/ERASE SUSPEND operations
Available protocols
– Available READ operations
– Quad or dual output fast read
– Quad or dual I/O fast read
Flexible to fit application
– Configurable number of dummy cycles
– Output buffer configurable
Software reset
RESET# pin for selected part numbers
3-byte and 4-byte addressability mode supported
64-byte, user-lockable, one-time programmable
(OTP) dedicated area
Erase capability
– Subsector erase 4KB uniform granularity blocks
– Sector erase 64KB uniform granularity blocks
– Single die erase
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Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.
512Mb, 1.8V, Multiple I/O Serial Flash Memory
Features
Contents
Device Description ........................................................................................................................................... 6
Features ....................................................................................................................................................... 6
3-Byte Address and 4-Byte Address Modes ..................................................................................................... 6
Operating Protocols ...................................................................................................................................... 6
XIP Mode ..................................................................................................................................................... 7
Device Configurability .................................................................................................................................. 7
Signal Assignments ........................................................................................................................................... 8
Signal Descriptions ......................................................................................................................................... 10
Memory Organization .................................................................................................................................... 12
Memory Configuration and Block Diagram .................................................................................................. 12
Memory Map – 512Mb Density ....................................................................................................................... 13
Device Protection ........................................................................................................................................... 14
Serial Peripheral Interface Modes .................................................................................................................... 16
SPI Protocols .................................................................................................................................................. 18
Nonvolatile and Volatile Registers ................................................................................................................... 19
Status Register ............................................................................................................................................ 20
Nonvolatile and Volatile Configuration Registers .......................................................................................... 21
Extended Address Register .......................................................................................................................... 24
Enhanced Volatile Configuration Register .................................................................................................... 25
Flag Status Register ..................................................................................................................................... 26
Command Definitions .................................................................................................................................... 28
READ REGISTER and WRITE REGISTER Operations ........................................................................................ 32
READ STATUS REGISTER or FLAG STATUS REGISTER Command ................................................................ 32
READ NONVOLATILE CONFIGURATION REGISTER Command ................................................................... 33
READ VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command .................................. 33
READ EXTENDED ADDRESS REGISTER Command ..................................................................................... 34
WRITE STATUS REGISTER Command ......................................................................................................... 34
WRITE NONVOLATILE CONFIGURATION REGISTER Command ................................................................. 35
WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command ................................. 35
WRITE EXTENDED ADDRESS REGISTER Command ................................................................................... 36
READ LOCK REGISTER Command .............................................................................................................. 36
WRITE LOCK REGISTER Command ............................................................................................................ 38
CLEAR FLAG STATUS REGISTER Command ................................................................................................ 39
READ IDENTIFICATION Operations ............................................................................................................... 40
READ ID and MULTIPLE I/O READ ID Commands ...................................................................................... 40
READ SERIAL FLASH DISCOVERY PARAMETER Command ......................................................................... 41
READ MEMORY Operations ............................................................................................................................ 45
3-Byte Address ........................................................................................................................................... 45
4-Byte Address ........................................................................................................................................... 46
READ MEMORY Operations Timing – Single Transfer Rate ........................................................................... 48
READ MEMORY Operations Timing – Double Transfer Rate ......................................................................... 52
PROGRAM Operations .................................................................................................................................... 56
WRITE Operations .......................................................................................................................................... 61
WRITE ENABLE Command ......................................................................................................................... 61
WRITE DISABLE Command ........................................................................................................................ 61
ERASE Operations .......................................................................................................................................... 63
SUBSECTOR ERASE Command ................................................................................................................... 63
SECTOR ERASE Command ......................................................................................................................... 63
DIE ERASE Command ................................................................................................................................ 64
BULK ERASE Command ............................................................................................................................. 65
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Features
PROGRAM/ERASE SUSPEND Command .....................................................................................................
PROGRAM/ERASE RESUME Command ......................................................................................................
RESET Operations ..........................................................................................................................................
RESET ENABLE and RESET MEMORY Command ........................................................................................
RESET Conditions ......................................................................................................................................
ONE-TIME PROGRAMMABLE Operations .......................................................................................................
READ OTP ARRAY Command ......................................................................................................................
PROGRAM OTP ARRAY Command ..............................................................................................................
ADDRESS MODE Operations – Enter and Exit 4-Byte Address Mode .................................................................
ENTER or EXIT 4-BYTE ADDRESS MODE Command ...................................................................................
ENTER or EXIT QUAD Command ................................................................................................................
XIP Mode .......................................................................................................................................................
Activate or Terminate XIP Using Volatile Configuration Register ...................................................................
Activate or Terminate XIP Using Nonvolatile Configuration Register .............................................................
Confirmation Bit Settings Required to Activate or Terminate XIP ..................................................................
Terminating XIP After a Controller and Memory Reset .................................................................................
Power-Up and Power-Down ............................................................................................................................
Power-Up and Power-Down Requirements ..................................................................................................
Power Loss Recovery Sequence ...................................................................................................................
AC Reset Specifications ...................................................................................................................................
Absolute Ratings and Operating Conditions .....................................................................................................
DC Characteristics and Operating Conditions ..................................................................................................
AC Characteristics and Operating Conditions ..................................................................................................
Package Dimensions .......................................................................................................................................
Part Number Ordering Information .................................................................................................................
Revision History .............................................................................................................................................
Rev. L – 03/14 .............................................................................................................................................
Rev. K – 01/14 .............................................................................................................................................
Rev. J – 09/13 ..............................................................................................................................................
Rev. I – 05/13 ..............................................................................................................................................
Rev. H – 02/13 .............................................................................................................................................
Rev. G – 11/12 .............................................................................................................................................
Rev. F – 06/12 .............................................................................................................................................
Rev. E – 05/12 .............................................................................................................................................
Rev. D – 03/12 .............................................................................................................................................
Rev. C – 01/12 .............................................................................................................................................
Rev. B – 11/11 .............................................................................................................................................
Rev. A – 10/11 .............................................................................................................................................
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Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
512Mb, 1.8V, Multiple I/O Serial Flash Memory
Features
List of Figures
Figure 1: Logic Diagram ................................................................................................................................... 7
Figure 2: 8-Lead, VDFPN8 – MLP8 (Top View) .................................................................................................. 8
Figure 3: 24-Ball TBGA (Balls Down) ................................................................................................................ 8
Figure 4: 16-Pin SO16 (Top View) ..................................................................................................................... 9
Figure 5: Block Diagram ................................................................................................................................ 12
Figure 6: Bus Master and Memory Devices on the SPI Bus ............................................................................... 17
Figure 7: SPI Modes ....................................................................................................................................... 17
Figure 8: Internal Configuration Register ........................................................................................................ 19
Figure 9: Upper and Lower Memory Array Segments ....................................................................................... 24
Figure 10: READ REGISTER Command .......................................................................................................... 33
Figure 11: WRITE REGISTER Command ......................................................................................................... 35
Figure 12: READ LOCK REGISTER Command ................................................................................................. 38
Figure 13: WRITE LOCK REGISTER Command ............................................................................................... 39
Figure 14: READ ID and MULTIPLE I/O Read ID Commands .......................................................................... 41
Figure 15: READ Command ........................................................................................................................... 48
Figure 16: FAST READ Command ................................................................................................................... 48
Figure 17: DUAL OUTPUT FAST READ Command .......................................................................................... 49
Figure 18: DUAL INPUT/OUTPUT FAST READ Command .............................................................................. 49
Figure 19: QUAD OUTPUT FAST READ Command ......................................................................................... 50
Figure 20: QUAD INPUT/OUTPUT FAST READ Command ............................................................................. 51
Figure 21: FAST READ Command – DTR ......................................................................................................... 52
Figure 22: DUAL OUTPUT FAST READ Command – DTR ................................................................................ 53
Figure 23: DUAL INPUT/OUTPUT FAST READ Command – DTR .................................................................... 53
Figure 24: QUAD OUTPUT FAST READ Command – DTR ............................................................................... 54
Figure 25: QUAD INPUT/OUTPUT FAST READ Command – DTR ................................................................... 54
Figure 26: PAGE PROGRAM Command .......................................................................................................... 57
Figure 27: DUAL INPUT FAST PROGRAM Command ...................................................................................... 58
Figure 28: EXTENDED DUAL INPUT FAST PROGRAM Command ................................................................... 58
Figure 29: QUAD INPUT FAST PROGRAM Command ..................................................................................... 59
Figure 30: EXTENDED QUAD INPUT FAST PROGRAM Command ................................................................... 60
Figure 31: WRITE ENABLE and WRITE DISABLE Command Sequence ............................................................ 62
Figure 32: SUBSECTOR and SECTOR ERASE Command .................................................................................. 64
Figure 33: DIE ERASE Command ................................................................................................................... 65
Figure 34: BULK ERASE Command ................................................................................................................ 66
Figure 35: RESET ENABLE and RESET MEMORY Command ........................................................................... 69
Figure 36: READ OTP Command .................................................................................................................... 70
Figure 37: PROGRAM OTP Command ............................................................................................................ 71
Figure 38: XIP Mode Directly After Power-On .................................................................................................. 74
Figure 39: Power-Up Timing .......................................................................................................................... 76
Figure 40: Reset AC Timing During PROGRAM or ERASE Cycle ........................................................................ 79
Figure 41: Reset Enable ................................................................................................................................. 79
Figure 42: Serial Input Timing ........................................................................................................................ 79
Figure 43: Write Protect Setup and Hold During WRITE STATUS REGISTER Operation (SRWD = 1) ................... 80
Figure 44: Hold Timing .................................................................................................................................. 81
Figure 45: Output Timing .............................................................................................................................. 81
Figure 46: V PPH Timing .................................................................................................................................. 82
Figure 47: AC Timing Input/Output Reference Levels ...................................................................................... 84
Figure 48: V-PDFN-8/8mm x 6mm ................................................................................................................. 88
Figure 49: SOP2-16/300 mils .......................................................................................................................... 89
Figure 50: T-PBGA-24b05/6mm x 8mm .......................................................................................................... 90
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Micron Technology, Inc. reserves the right to change products or specifications without notice.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Features
List of Tables
Table 1: Signal Descriptions ...........................................................................................................................
Table 2: Sectors[1023:0] .................................................................................................................................
Table 3: Data Protection Using Device Protocols .............................................................................................
Table 4: Memory Sector Protection Truth Table ..............................................................................................
Table 5: Protected Area Sizes – Upper Area .....................................................................................................
Table 6: Protected Area Sizes – Lower Area ......................................................................................................
Table 7: SPI Modes ........................................................................................................................................
Table 8: Extended, Dual, and Quad SPI Protocols ............................................................................................
Table 9: Status Register Bit Definitions ...........................................................................................................
Table 10: Nonvolatile Configuration Register Bit Definitions ...........................................................................
Table 11: Volatile Configuration Register Bit Definitions ..................................................................................
Table 12: Sequence of Bytes During Wrap .......................................................................................................
Table 13: Supported Clock Frequencies – STR .................................................................................................
Table 14: Supported Clock Frequencies – DTR ................................................................................................
Table 15: Extended Address Register Bit Definitions ........................................................................................
Table 16: Enhanced Volatile Configuration Register Bit Definitions ..................................................................
Table 17: Flag Status Register Bit Definitions ..................................................................................................
Table 18: Command Set .................................................................................................................................
Table 19: Lock Register ..................................................................................................................................
Table 20: Data/Address Lines for READ ID and MULTIPLE I/O READ ID Commands .......................................
Table 21: Read ID Data Out ............................................................................................................................
Table 22: Extended Device ID, First Byte .........................................................................................................
Table 23: Serial Flash Discovery Parameter Data Structure ..............................................................................
Table 24: Parameter ID ..................................................................................................................................
Table 25: Command/Address/Data Lines for READ MEMORY Commands .......................................................
Table 26: Command/Address/Data Lines for READ MEMORY Commands – 4-Byte Address .............................
Table 27: Data/Address Lines for PROGRAM Commands ................................................................................
Table 28: Suspend Parameters .......................................................................................................................
Table 29: Operations Allowed/Disallowed During Device States ......................................................................
Table 30: Reset Command Set ........................................................................................................................
Table 31: OTP Control Byte (Byte 64) ..............................................................................................................
Table 32: XIP Confirmation Bit .......................................................................................................................
Table 33: Effects of Running XIP in Different Protocols ....................................................................................
Table 34: Power-Up Timing and V WI Threshold ...............................................................................................
Table 35: AC RESET Conditions ......................................................................................................................
Table 36: Absolute Ratings .............................................................................................................................
Table 37: Operating Conditions ......................................................................................................................
Table 38: Input/Output Capacitance ..............................................................................................................
Table 39: AC Timing Input/Output Conditions ...............................................................................................
Table 40: DC Current Characteristics and Operating Conditions ......................................................................
Table 41: DC Voltage Characteristics and Operating Conditions ......................................................................
Table 42: AC Characteristics and Operating Conditions ...................................................................................
Table 43: Part Number Information ................................................................................................................
Table 44: Package Details ...............................................................................................................................
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Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
512Mb, 1.8V, Multiple I/O Serial Flash Memory
Device Description
Device Description
The N25Q is a high-performance multiple input/output serial Flash memory device
manufactured on 65nm NOR technology. It features execute-in-place (XIP) functionality, advanced write protection mechanisms, and a high-speed SPI-compatible bus interface. Innovative, high-performance, dual and quad input/output instructions enable
double or quadruple the transfer bandwidth for READ and PROGRAM operations.
Features
The 512Mb N25Q stacked device contains two 256Mb die. From a user standpoint this
stacked device behaves as a monolithic device, except with regard to READ MEMORY
and ERASE operations and status polling. The device contains a single chip select (S#); a
dual-chip version is also available. Contact the factory for more information.
The memory is organized as 1024 (64KB) main sectors that are further divided into 16
subsectors each (16,384 subsectors in total). The memory can be erased one 4KB subsector at a time, 64KB sectors at a time, or single die (256Mb) at a time.
The memory can be write protected by software through volatile and nonvolatile protection features, depending on the application needs. The protection granularity is of
64KB (sector granularity) for volatile protections
The device has 64 one-time programmable (OTP) bytes that can be read and programmed with the READ OTP and PROGRAM OTP commands. These 64 bytes can also be
permanently locked with a PROGRAM OTP command.
The device can also pause and resume PROGRAM and ERASE cycles by using dedicated
PROGRAM/ERASE SUSPEND and RESUME instructions.
3-Byte Address and 4-Byte Address Modes
The device features 3-byte or 4-byte address modes to access memory beyond 128Mb.
When 4-byte address mode is enabled, all commands requiring an address must be entered and exited with a 4-byte address mode command: ENTER 4-BYTE ADDRESS
MODE command and EXIT 4-BYTE ADDRESS MODE command. The 4-byte address
mode can also be enabled through the nonvolatile configuration register. See Registers
for more information.
Operating Protocols
The memory can be operated with three different protocols:
• Extended SPI (standard SPI protocol upgraded with dual and quad operations)
• Dual I/O SPI
• Quad I/O SPI
The standard SPI protocol is extended and enhanced by dual and quad operations. In
addition, the dual SPI and quad SPI protocols improve the data access time and
throughput of a single I/O device by transmitting commands, addresses, and data
across two or four data lines.
Each protocol contains unique commands to perform READ operations in DTR mode.
This enables high data throughput while running at lower clock frequencies.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Device Description
XIP Mode
XIP mode requires only an address (no instruction) to output data, improving random
access time and eliminating the need to shadow code onto RAM for fast execution.
Nonvolatile configuration register bits can set XIP mode as the default mode for applications that must enter XIP mode immediately after powering up.
All protocols support XIP operation. For flexibility, multiple XIP entry and exit methods
are available. For applications that must enter XIP mode immediately after power-up,
nonvolatile configuration register bit settings can enable XIP as the default mode.
Device Configurability
The N25Q family offers additional features that are configured through the nonvolatile
configuration register for default and/or nonvolatile settings. Volatile settings can be
configured through the volatile and volatile-enhanced configuration registers. These
configurable features include the following:
•
•
•
•
•
•
Number of dummy cycles for the fast READ commands
Output buffer impedance
SPI protocol types (extended SPI, dual SPI, or quad SPI)
Required XIP mode
Enabling/disabling HOLD (RESET function)
Enabling/disabling wrap mode
Figure 1: Logic Diagram
VCC
DQ0
DQ1
C
S#
RESET2
VPP/W#/DQ2
HOLD#/DQ3
VSS
Note:
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1. Reset functionality is available in devices with a dedicated part number. See Part Number Ordering Information for more details.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Signal Assignments
Signal Assignments
Figure 2: 8-Lead, VDFPN8 – MLP8 (Top View)
Notes:
S#
1
8
VCC
DQ1
2
7
HOLD#/DQ3
W#/VPP/DQ2
3
6
C
VSS
4
5
DQ0
1. On the underside of the MLP8 package, there is an exposed central pad that is pulled
internally to VSS and must not be connected to any other voltage or signal line on the
PCB.
2. Reset functionality is available in devices with a dedicated part number. See Part Number Ordering Information for complete package names and details.
Figure 3: 24-Ball TBGA (Balls Down)
1
2
3
4
5
NC
NC
RESET/NC
NC
NC
C
VSS
VCC
NC
NC
S#
NC W#/VPP/DQ2 NC
NC
DQ1
DQ0 HOLD#/DQ3 NC
NC
NC
A
B
C
D
E
Note:
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NC
NC
NC
1. Reset functionality is available in devices with a dedicated part number. See Part Number Ordering Information for complete package names and details.
8
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© 2012 Micron Technology, Inc. All rights reserved.
512Mb, 1.8V, Multiple I/O Serial Flash Memory
Signal Assignments
Figure 4: 16-Pin SO16 (Top View)
Note:
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HOLD#/DQ3
1
16
C
VCC
2
15
DQ0
RESET/DNU2
3
14
DNU
DNU
4
13
DNU
DNU
5
12
DNU
DNU
6
11
DNU
S#
7
10
VSS
DQ1
8
9
W#/VPP/DQ2
1. Reset functionality is available in devices with a dedicated part number. See Part Number Ordering Information for complete package names and details.
9
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© 2012 Micron Technology, Inc. All rights reserved.
512Mb, 1.8V, Multiple I/O Serial Flash Memory
Signal Descriptions
Signal Descriptions
The signal description table below is a comprehensive list of signals for the N25 family
devices. All signals listed may not be supported on this device. See Signal Assignments
for information specific to this device.
Table 1: Signal Descriptions
Symbol
Type
Description
C
Input
Clock: Provides the timing of the serial interface. Commands, addresses, or data present at serial data inputs are latched on the rising edge of the clock. Data is shifted out on the falling
edge of the clock.
S#
Input
Chip select: When S# is HIGH, the device is deselected and DQ1 is at High-Z. When in extended SPI mode, with the device deselected, DQ1 is tri-stated. Unless an internal PROGRAM,
ERASE, or WRITE STATUS REGISTER cycle is in progress, the device enters standby power mode
(not deep power-down mode). Driving S# LOW enables the device, placing it in the active power mode. After power-up, a falling edge on S# is required prior to the start of any command.
DQ0
Input
and I/O
Serial data: Transfers data serially into the device. It receives command codes, addresses, and
the data to be programmed. Values are latched on the rising edge of the clock. DQ0 is used for
input/output during the following operations: DUAL OUTPUT FAST READ, QUAD OUTPUT FAST
READ, DUAL INPUT/OUTPUT FAST READ, and QUAD INPUT/OUTPUT FAST READ. When used for
output, data is shifted out on the falling edge of the clock.
In DIO-SPI, DQ0 always acts as an input/output.
In QIO-SPI, DQ0 always acts as an input/output, with the exception of the PROGRAM or ERASE
cycle performed with VPP. The device temporarily enters the extended SPI protocol and then returns to QIO-SPI as soon as VPP goes LOW.
DQ1
Output
and I/O
Serial data:Transfers data serially out of the device. Data is shifted out on the falling edge of
the clock. DQ1 is used for input/output during the following operations: DUAL INPUT FAST
PROGRAM, QUAD INPUT FAST PROGRAM, DUAL INPUT EXTENDED FAST PROGRAM, and QUAD
INPUT EXTENDED FAST PROGRAM. When used for input, data is latched on the rising edge of
the clock.
In DIO-SPI, DQ1 always acts as an input/output.
In QIO-SPI, DQ1 always acts as an input/output, with the exception of the PROGRAM or ERASE
cycle performed with the enhanced program supply voltage (VPP). In this case the device temporarily enters the extended SPI protocol and then returns to QIO-SPI as soon as VPP goes LOW.
DQ2
Input
and I/O
DQ2: When in QIO-SPI mode or in extended SPI mode using QUAD FAST READ commands, the
signal functions as DQ2, providing input/output.
All data input drivers are always enabled except when used as an output. Micron recommends
customers drive the data signals normally (to avoid unnecessary switching current) and float
the signals before the memory device drives data on them.
DQ3
Input
and I/O
DQ3: When in quad SPI mode or in extended SPI mode using quad FAST READ commands, the
signal functions as DQ3, providing input/output. HOLD# is disabled and RESET# is disabled if
the device is selected.
RESET#
Control
Input
RESET: This is a hardware RESET# signal. When RESET# is driven HIGH, the memory is in the
normal operating mode. When RESET# is driven LOW, the memory enters reset mode and output is High-Z. If RESET# is driven LOW while an internal WRITE, PROGRAM, or ERASE operation
is in progress, data may be lost.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Signal Descriptions
Table 1: Signal Descriptions (Continued)
Symbol
Type
HOLD#
Control
Input
HOLD: Pauses any serial communications with the device without deselecting the device. DQ1
(output) is High-Z. DQ0 (input) and the clock are "Don't Care." To enable HOLD, the device
must be selected with S# driven LOW.
HOLD# is used for input/output during the following operations: QUAD OUTPUT FAST READ,
QUAD INPUT/OUTPUT FAST READ, QUAD INPUT FAST PROGRAM, and QUAD INPUT EXTENDED
FAST PROGRAM.
In QIO-SPI, HOLD# acts as an I/O (DQ3 functionality), and the HOLD# functionality is disabled
when the device is selected. When the device is deselected (S# is HIGH) in parts with RESET#
functionality, it is possible to reset the device unless this functionality is not disabled by means
of dedicated registers bits.
The HOLD# functionality can be disabled using bit 4 of the NVCR or bit 4 of the VECR.
On devices that include DTR mode capability, the HOLD# functionality is disabled as soon as a
DTR operation is recognized.
W#
Control
Input
Write protect: W# can be used as a protection control input or in QIO-SPI operations. When in
extended SPI with single or dual commands, the WRITE PROTECT function is selectable by the
voltage range applied to the signal. If voltage range is low (0V to VCC), the signal acts as a
write protection control input. The memory size protected against PROGRAM or ERASE operations is locked as specified in the status register block protect bits 3:0.
W# is used as an input/output (DQ2 functionality) during QUAD INPUT FAST READ and QUAD
INPUT/OUTPUT FAST READ operations and in QIO-SPI.
VPP
Power
Supply voltage: If VPP is in the voltage range of VPPH, the signal acts as an additional power
supply, as defined in the AC Measurement Conditions table.
During QIFP, QIEFP, and QIO-SPI PROGRAM/ERASE operations, it is possible to use the additional VPP power supply to speed up internal operations. However, to enable this functionality, it is
necessary to set bit 3 of the VECR to 0.
In this case, VPP is used as an I/O until the end of the operation. After the last input data is shifted in, the application should apply VPP voltage to VPP within 200ms to speed up the internal
operations. If the VPP voltage is not applied within 200ms, the PROGRAM/ERASE operations
start at standard speed.
The default value of VECR bit 3 is 1, and the VPP functionality for quad I/O modify operations is
disabled.
VCC
Power
Device core power supply: Source voltage.
VSS
Ground
DNU
–
Do not use.
NC
–
No connect.
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Description
Ground: Reference for the VCC supply voltage.
11
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Memory Organization
Memory Organization
Memory Configuration and Block Diagram
The memory is a stacked device comprised of two 256Mb chips. Each chip is internally
partitioned into two 128Mb segments. Each page of memory can be individually programmed. Bits are programmed from one through zero. The device is subsector, sector,
or single 256Mb chip erasable, but not page-erasable. Bits are erased from zero through
one. The memory is configured as 67,108,864 bytes (8 bits each); 1024 sectors (64KB
each); 16,384 subsectors (4KB each); and 262,144 pages (256 bytes each); and 64 OTP
bytes are located outside the main memory array.
Figure 5: Block Diagram
RESET#/HOLD#
VPP
High voltage
generator
Control logic
64 OTP bytes
S#
C
DQ0
DQ1
DQ2
DQ3
I/O shift register
Address register
and counter
Status
register
256 byte
data buffer
Y decoder
03FFFFFFh
0000000h
00000FFh
256 bytes (page size)
X decoder
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Memory Map – 512Mb Density
Memory Map – 512Mb Density
Table 2: Sectors[1023:0]
Address Range
Sector
Subsector
Start
End
1023
16383
03FF F000h
03FF FFFFh
⋮
⋮
⋮
16368
03FF 0000h
03FF 0FFFh
⋮
⋮
⋮
⋮
511
8191
01FF F000h
01FF FFFFh
⋮
⋮
⋮
8176
01FF 0000h
01FF 0FFFh
⋮
⋮
⋮
⋮
255
4095
00FF F000h
00FF FFFFh
⋮
⋮
⋮
4080
00FF 0000h
00FF 0FFFh
⋮
⋮
⋮
⋮
127
2047
007F F000h
007F FFFFh
⋮
⋮
⋮
2032
007F 0000h
007F 0FFFh
⋮
⋮
⋮
⋮
63
1023
003F F000h
003F FFFFh
⋮
⋮
⋮
1008
003F 0000h
003F 0FFFh
⋮
⋮
⋮
⋮
0
15
0000 F000h
0000 FFFFh
⋮
⋮
⋮
0
0000 0000h
0000 0FFFh
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Device Protection
Device Protection
Table 3: Data Protection Using Device Protocols
Note 1 applies to the entire table
Protection by:
Description
Power-on reset and internal timer
Protects the device against inadvertent data changes while the power supply is outside the operating specification.
Command execution check
Ensures that the number of clock pulses is a multiple of one byte before executing a
PROGRAM or ERASE command, or any command that writes to the device registers.
WRITE ENABLE operation
Ensures that commands modifying device data must be preceded by a WRITE ENABLE
command, which sets the write enable latch bit in the status register.
Note:
1. Extended, dual, and quad SPI protocol functionality ensures that device data is protected from excessive noise.
Table 4: Memory Sector Protection Truth Table
Note 1 applies to the entire table
Sector Lock Register
Sector Lock
Down Bit
Sector Write Lock
Bit
0
0
Sector unprotected from PROGRAM and ERASE operations. Protection status reversible.
0
1
Sector protected from PROGRAM and ERASE operations. Protection status reversible.
1
0
Sector unprotected from PROGRAM and ERASE operations. Protection status not
reversible except by power cycle or reset.
1
1
Sector protected from PROGRAM and ERASE operations. Protection status not
reversible except by power cycle or reset.
Note:
Memory Sector Protection Status
1. Sector lock register bits are written to when the WRITE TO LOCK REGISTER command is
executed. The command will not execute unless the sector lock down bit is cleared (see
the WRITE TO LOCK REGISTER command).
Table 5: Protected Area Sizes – Upper Area
Note 1 applies to the entire table
Status Register Content
Memory Content
Top/
Bottom
Bit
BP3
BP2
BP1
BP0
Protected Area
Unprotected Area
0
0
0
0
0
None
All sectors
0
0
0
0
1
Sector 1023
Sectors (0 to 1022)
0
0
0
1
0
Sectors (1022 to 1023)
Sectors (0 to 1021)
0
0
0
1
1
Sectors (1020 to 1023)
Sectors (0 to 1019)
0
0
1
0
0
Sectors (1016 to 1023)
Sectors (0 to 1015)
0
0
1
0
1
Sectors (1008 to 1023)
Sectors (0 to 1007)
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Device Protection
Table 5: Protected Area Sizes – Upper Area (Continued)
Note 1 applies to the entire table
Status Register Content
Memory Content
Top/
Bottom
Bit
BP3
BP2
BP1
BP0
Protected Area
Unprotected Area
0
0
1
1
0
Sectors (992 to 1023)
Sectors (0 to 991)
0
0
1
1
1
Sectors (960 to 1023)
Sectors (0 to 959)
0
1
0
0
0
Sectors (896 to 1023)
Sectors (0 to 895)
0
1
0
0
1
Sectors (768 to 1023)
Sectors (0 to 767)
0
1
0
1
0
Sectors (512 to 1023)
Sectors (0 to 511)
0
1
0
1
1
All sectors
None
0
1
1
0
0
All sectors
None
0
1
1
0
1
All sectors
None
0
1
1
1
0
All sectors
None
0
1
1
1
1
All sectors
None
Note:
1. See the Status Register for details on the top/bottom bit and the BP 3:0 bits.
Table 6: Protected Area Sizes – Lower Area
Note 1 applies to the entire table
Status Register Content
Memory Content
Top/
Bottom
Bit
BP3
BP2
BP1
BP0
Protected Area
Unprotected Area
1
0
0
0
0
None
All sectors
1
0
0
0
1
Sector 0
Sectors (1 to 1023)
1
0
0
1
0
Sectors (0 to 1)
Sectors (2 to 1023)
1
0
0
1
1
Sectors (0 to 3)
Sectors (4 to 1023)
1
0
1
0
0
Sectors (0 to 7)
Sectors (8 to 1023)
1
0
1
0
1
Sectors (0 to 15)
Sectors (16 to 1023)
1
0
1
1
0
Sectors (0 to 31)
Sectors (32 to 1023)
1
0
1
1
1
Sectors (0 to 63)
Sectors (64 to 1023)
1
1
0
0
0
Sectors (0 to 127)
Sectors (128 to 1023)
1
1
0
0
1
Sectors (0 to 255)
Sectors (256 to 1023)
1
1
0
1
0
Lower half
Sectors (512 to 1023)
1
1
0
1
1
All sectors
None
1
1
1
0
0
All sectors
None
1
1
1
0
1
All sectors
None
1
1
1
1
0
All sectors
None
1
1
1
1
1
All sectors
None
Note:
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1. See the Status Register for details on the top/bottom bit and the BP 3:0 bits.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Serial Peripheral Interface Modes
Serial Peripheral Interface Modes
The device can be driven by a microcontroller while its serial peripheral interface is in
either of the two modes shown here. The difference between the two modes is the clock
polarity when the bus master is in standby mode and not transferring data. Input data is
latched in on the rising edge of the clock, and output data is available from the falling
edge of the clock.
Table 7: SPI Modes
Note:
Note 1 applies to the entire table
SPI Modes
Clock Polarity
CPOL = 0, CPHA = 0
C remains at 0 for (CPOL = 0, CPHA = 0)
CPOL = 1, CPHA = 1
C remains at 1 for (CPOL = 1, CPHA = 1)
1. The listed SPI modes are supported in extended, dual, and quad SPI protocols.
Shown below is an example of three memory devices in extended SPI protocol in a simple connection to an MCU on an SPI bus. Because only one device is selected at a time,
that one device drives DQ1, while the other devices are High-Z.
Resistors ensure the device is not selected if the bus master leaves S# High-Z. The bus
master might enter a state in which all input/output is High-Z simultaneously, such as
when the bus master is reset. Therefore, the serial clock must be connected to an external pull-down resistor so that S# is pulled HIGH while the serial clock is pulled LOW.
This ensures that S# and the serial clock are not HIGH simultaneously and that tSHCH
is met. The typical resistor value of 100kΩ, assuming that the time constant R × Cp (Cp =
parasitic capacitance of the bus line), is shorter than the time the bus master leaves the
SPI bus in High-Z.
Example: Cp = 50pF, that is R × Cp = 5μs. The application must ensure that the bus master never leaves the SPI bus High-Z for a time period shorter than 5μs. W# and HOLD#
should be driven either HIGH or LOW, as appropriate.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Serial Peripheral Interface Modes
Figure 6: Bus Master and Memory Devices on the SPI Bus
VSS
VCC
R
SDO
SPI interface:
(CPOL, CPHA) =
(0, 0) or (1, 1)
SDI
SCK
VCC
C
SPI bus master
DQ1 DQ0
R
CS3
SPI memory
device
VCC
C
VSS
R
DQ1
DQ0
SPI memory
device
VCC
C
VSS
R
DQ1 DQ0
VSS
SPI memory
device
CS2 CS1
S#
W# HOLD#
S#
W# HOLD#
S#
W# HOLD#
Figure 7: SPI Modes
CPOL CPHA
0
0
C
1
1
C
DQ0
MSB
DQ1
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MSB
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
SPI Protocols
SPI Protocols
Table 8: Extended, Dual, and Quad SPI Protocols
Protocol
Name
Command
Input
Extended
DQ0
Multiple DQn
lines, depending
on the command
Dual
DQ[1:0]
DQ[1:0]
Address
Input
Data
Input/Output
Description
Multiple DQn
Device default protocol from the factory. Additional comlines, depending mands extend the standard SPI protocol and enable address
on the command or data transmission on multiple DQn lines.
DQ[1:0]
Volatile selectable: When the enhanced volatile configuration register bit 6 is set to 0 and bit 7 is set to 1, the device enters the dual SPI protocol immediately after the
WRITE ENHANCED VOLATILE CONFIGURATION REGISTER
command. The device returns to the default protocol after
the next power-on. In addition, the device can return to default protocol using the rescue sequence or through new
WRITE ENHANCED VOLATILE CONFIGURATION REGISTER
command, without power-off or power-on.
Nonvolatile selectable: When nonvolatile configuration
register bit 2 is set, the device enters the dual SPI protocol
after the next power-on. Once this register bit is set, the device defaults to the dual SPI protocol after all subsequent
power-on sequences until the nonvolatile configuration
register bit is reset to 1.
Quad1
DQ[3:0]
DQ[3:0]
DQ[3:0]
Volatile selectable: When the enhanced volatile configuration register bit 7 is set to 0, the device enters the quad
SPI protocol immediately after the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. The device returns to the default protocol after the next power-on. In addition, the device can return to default protocol using the
rescue sequence or through new WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command, without poweroff or power-on.
Nonvolatile selectable: When nonvolatile configuration
register bit 3 is set to 0, the device enters the quad SPI protocol after the next power-on. Once this register bit is set,
the device defaults to the quad SPI protocol after all subsequent power-on sequences until the nonvolatile configuration register bit is reset to 1.
Note:
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1. In quad SPI protocol, all command/address input and data I/O are transmitted on four
lines except during a PROGRAM and ERASE cycle performed with VPP. In this case, the
device enters the extended SPI protocol to temporarily allow the application to perform
a PROGRAM/ERASE SUSPEND operation or to check the write-in-progress bit in the status register or the program/erase controller bit in the flag status register. Then, when
VPP goes LOW, the device returns to the quad SPI protocol.
18
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Nonvolatile and Volatile Registers
The device features the following volatile and nonvolatile registers that users can access
to store device parameters and operating configurations:
•
•
•
•
•
•
Status register
Nonvolatile and volatile configuration registers
Extended address register
Enhanced volatile configuration register
Flag status register
Lock register
Note: The lock register is defined in READ LOCK REGISTER Command.
The working condition of memory is set by an internal configuration register that is not
directly accessible to users. As shown below, parameters in the internal configuration
register are loaded from the nonvolatile configuration register during each device boot
phase or power-on reset. In this sense, then, the nonvolatile configuration register contains the default settings of memory.
Also, during the life of an application, each time a WRITE VOLATILE or ENHANCED
VOLATILE CONFIGURATION REGISTER command executes to set configuration parameters in these respective registers, these new settings are copied to the internal configuration register. Therefore, memory settings can be changed in real time. However, at
the next power-on reset, the memory boots according to the memory settings defined
in the nonvolatile configuration register parameters.
Figure 8: Internal Configuration Register
Nonvolatile configuration register
Volatile configuration register and enhanced
volatile configuration register
Register download is executed only during the power-on phase or after a reset,
overwriting configuration register settings on the internal configuration register.
Register download is executed after a WRITE VOLATILE OR ENHANCED VOLATILE
CONFIGURATION REGISTER command, overwriting configuration register settings
on the internal configuration register.
Internal configuration
register
Device behavior
Although each die in the device is independent of one another, the description here is the same
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Status Register
Table 9: Status Register Bit Definitions
Note 1 applies to entire table
Bit
Name
Settings
Description
Notes
7
Status register
0 = Enabled
write enable/disable 1 = Disabled
Nonvolatile bit: Used with the W# signal to enable or disable writing to the status register.
3
5
Top/bottom
0 = Top
1 = Bottom
Nonvolatile bit: Determines whether the protected memory area defined by the block protect bits starts from the
top or bottom of the memory array.
4
6, 4:2
Block protect 3–0
See Protected Area
Sizes – Upper Area
and Lower Area tables in Device Protection
Nonvolatile bit: Defines memory to be software protected against PROGRAM or ERASE operations. When one or
more block protect bits is set to 1, a designated memory
area is protected from PROGRAM and ERASE operations.
4
1
Write enable latch
0 = Cleared (Default) Volatile bit: The device always powers up with this bit
1 = Set
cleared to prevent inadvertent WRITE STATUS REGISTER,
PROGRAM, or ERASE operations. To enable these operations, the WRITE ENABLE operation must be executed first
to set this bit.
0
Write in progress
0 = Ready
1 = Busy
Notes:
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Volatile bit: Indicates if one of the following command cycles is in progress:
WRITE STATUS REGISTER
WRITE NONVOLATILE CONFIGURATION REGISTER
PROGRAM
ERASE
2, 5
2, 6
1. Bits can be read from or written to using READ STATUS REGISTER or WRITE STATUS REGISTER commands, respectively.
2. Volatile bits are cleared to 0 by a power cycle or reset.
3. The status register write enable/disable bit, combined with the W#/VPP signal as described in the Signal Descriptions, provides hardware data protection for the device as follows: When the enable/disable bit is set to 1, and the W#/VPP signal is driven LOW, the
status register nonvolatile bits become read-only and the WRITE STATUS REGISTER operation will not execute. The only way to exit this hardware-protected mode is to drive
W#/VPP HIGH.
4. See Protected Area Sizes tables. The DIE ERASE command is executed only if all bits are
0.
5. In case of protection error this volatile bit is set and can be reset only by means of a
CLEAR FLAG STATUS REGISTER command.
6. Program or erase controller bit = NOT (write in progress bit).
20
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Nonvolatile and Volatile Configuration Registers
Table 10: Nonvolatile Configuration Register Bit Definitions
Note 1 applies to entire table
Bit Name
Settings
Description
Notes
15:12 Number of
dummy clock
cycles
0000 (identical to 1111)
0001
0010
.
.
1101
1110
1111
Sets the number of dummy clock cycles subsequent to all FAST READ commands.
The default setting targets the maximum allowed frequency and guarantees backward compatibility.
11:9
XIP mode at
power-on reset
000 = XIP: Fast Read
001 = XIP: Dual Output Fast Read
010 = XIP: Dual I/O Fast Read
011 = XIP: Quad Output Fast Read
100 = XIP: Quad I/O Fast Read
101 = Reserved
110 = Reserved
111 = Disabled (Default)
Enables the device to operate in the selected XIP
mode immediately after power-on reset.
8:6
Output driver 000 = Reserved
strength
001 = 90 Ohms
010 = 60 Ohms
011 = 45 Ohms
100 = Reserved
101 = 20 Ohms
110 = 15 Ohms
111 = 30 (Default)
Optimizes impedance at VCC/2 output voltage.
5
Reserved
X
"Don't Care."
4
Reset/hold
0 = Disabled
1 = Enabled (Default)
Enables or disables hold or reset.
(Available on dedicated part numbers.)
3
Quad I/O pro- 0 = Enabled
tocol
1 = Disabled (Default, Extended SPI protocol)
Enables or disables quad I/O protocol.
4
2
Dual I/O protocol
0 = Enabled
1 = Disabled (Default, Extended SPI protocol)
Enables or disables dual I/O protocol.
4
1
128Mb segment select
0 = Upper 128Mb segment
1 = Lower 128Mb segment (Default)
Selects a 128Mb segment as default for 3B address operations. See also the extended address
register.
0
Address bytes 0 = Enable 4B address
1 = Enable 3B address (Default)
Notes:
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2, 3
Defines the number of address bytes for a command.
1. Settings determine device memory configuration after power-on. The device ships from
the factory with all bits erased to 1 (FFFFh). The register is read from or written to by
READ NONVOLATILE CONFIGURATION REGISTER or WRITE NONVOLATILE CONFIGURATION REGISTER commands, respectively.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
2. The 0000 and 1111 settings are identical in that they both define the default state,
which is the maximum frequency of fc = 108 MHz. This ensures backward compatibility.
3. If the number of dummy clock cycles is insufficient for the operating frequency, the
memory reads wrong data. The number of cycles must be set according to and sufficient
for the clock frequency, which varies by the type of FAST READ command, as shown in
the Supported Clock Frequencies table.
4. If bits 2 and 3 are both set to 0, the device operates in quad I/O. When bits 2 or 3 are
reset to 0, the device operates in dual I/O or quad I/O respectively, after the next poweron.
Table 11: Volatile Configuration Register Bit Definitions
Note 1 applies to entire table
Bit
Name
Settings
7:4
Description
Notes
Number of dummy clock cycles
0000 (identical to 1111)
0001
0010
.
.
1101
1110
1111
Sets the number of dummy clock cycles subsequent to
all FAST READ commands.
The default setting targets maximum allowed frequency and guarantees backward compatibility.
3
XIP
0
1
Enables or disables XIP. For device part numbers with
feature digit equal to 2 or 4, this bit is always "Don’t
Care," so the device operates in XIP mode without setting this bit.
2
Reserved
x = Default
0b = Fixed value.
Wrap
00 = 16-byte boundary
aligned
16-byte wrap: Output data wraps within an aligned 16byte boundary starting from the address (3-byte or 4byte) issued after the command code.
01 = 32-byte boundary
aligned
32-byte wrap: Output data wraps within an aligned 32byte boundary starting from the address (3-byte or 4byte) issued after the command code.
10 = 64-byte boundary
aligned
64-byte wrap: Output data wraps within an aligned 64byte boundary starting from the address (3-byte or 4byte) issued after the command code.
11 = sequential (default)
Continuous reading (default): All bytes are read sequentially.
1:0
Notes:
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2, 3
4
1. Settings determine the device memory configuration upon a change of those settings by
the WRITE VOLATILE CONFIGURATION REGISTER command. The register is read from or
written to by READ VOLATILE CONFIGURATION REGISTER or WRITE VOLATILE CONFIGURATION REGISTER commands respectively.
2. The 0000 and 1111 settings are identical in that they both define the default state,
which is the maximum frequency of fc = 108 MHz. This ensures backward compatibility.
3. If the number of dummy clock cycles is insufficient for the operating frequency, the
memory reads wrong data. The number of cycles must be set according to and be sufficient for the clock frequency, which varies by the type of FAST READ command, as
shown in the Supported Clock Frequencies table.
4. See the Sequence of Bytes During Wrap table.
22
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Table 12: Sequence of Bytes During Wrap
Starting Address
16-Byte Wrap
32-Byte Wrap
64-Byte Wrap
0
0-1-2- . . . -15-0-1- . .
0-1-2- . . . -31-0-1- . .
0-1-2- . . . -63-0-1- . .
1
1-2- . . . -15-0-1-2- . .
1-2- . . . -31-0-1-2- . .
1-2- . . . -63-0-1-2- . .
15
15-0-1-2-3- . . . -15-0-1- . .
15-16-17- . . . -31-0-1- . .
15-16-17- . . . -63-0-1- . .
31
31-16-17- . . . -31-16-17- . .
31-0-1-2-3- . . . -31-0-1- . .
31-32-33- . . . -63-0-1- . .
63
63-48-49- . . . -63-48-49- . .
63-32-33- . . . -63-32-33- . .
63-0-1- . . . -63-0-1- . .
Table 13: Supported Clock Frequencies – STR
Note 1 applies to entire table
Number of Dummy
Clock Cycles
FAST READ
DUAL OUTPUT
FAST READ
DUAL I/O FAST
READ
QUAD OUTPUT
FAST READ
QUAD I/O FAST
READ
1
90
80
50
43
30
2
100
90
70
60
40
3
108
100
80
75
50
4
108
105
90
90
60
5
108
108
100
100
70
6
108
108
105
105
80
7
108
108
108
108
86
8
108
108
108
108
95
9
108
108
108
108
105
10
108
108
108
108
108
Note:
1. Values are guaranteed by characterization and not 100% tested in production.
Table 14: Supported Clock Frequencies – DTR
Note 1 applies to entire table
Number of Dummy
Clock Cycles
FAST READ
DUAL OUTPUT
FAST READ
DUAL I/O FAST
READ
QUAD OUTPUT
FAST READ
QUAD I/O FAST
READ
1
45
40
25
30
15
2
50
45
35
38
20
3
54
50
40
45
25
4
54
53
45
47
30
5
54
54
50
50
35
6
54
54
53
53
40
7
54
54
54
54
43
8
54
54
54
54
48
9
54
54
54
54
53
10
54
54
54
54
54
Note:
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1. Values are guaranteed by characterization and not 100% tested in production.
23
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Extended Address Register
In the case of 3-byte addressability mode, the device includes an extended address register that provides a fourth address byte A[31:24], enabling access to memory beyond
128Mb. The extended address register bits [1:0] are used to select one of the four 128Mb
segments of the memory array.
Figure 9: Upper and Lower Memory Array Segments
03FFFFFFh
A[25:24] = 11
02FFFFFFh
A[25:24] = 10
03000000h
01FFFFFFh
A[25:24] = 01
02000000h
00FFFFFFh
01000000h
A[25:24] = 00
00000000h
The PROGRAM and ERASE operations act upon the 128Mb segment selected in the extended address register.
The READ operation begins reading in the selected 128Mb segment. It is bound by the
256Mb (die segment) to which the 128Mb segment belongs. In a continuos read, when
the last byte of the die segment selected is read, the next byte output is the first byte of
the same die segment; therefore, a download of the whole array is not possible with one
READ operation. The value of the extended address register does not change when a
READ operation crosses the selected 128Mb boundary.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Table 15: Extended Address Register Bit Definitions
Note 1 applies to entire table
Bit Name
Settings
7
Description
A[31:26]
0 = Reserved
–
A[25:24]
11 = Upper 128Mb segment
10 = Third 128Mb segment
01 = Second 128Mb segment
00 = Lower 128Mb segment (default)
Enable selecting 128Mb segmentation. For A[25:24] ,
the default setting is determined by bit 1 of the nonvolatile configuration register. However, this setting
can be changed using the WRITE EXTENDED ADDRESS REGISTER command.
6
5
4
3
2
1
0
Note:
1. The extended address register is for an application that supports only 3-byte addressing.
It extends the device's first three address bytes A[23:0] to a fourth address byte A[31:24]
to enable memory access beyond 128Mb. The extended address register bits [1:0] are
used to select one of the four 128Mb segments of the memory array. If 4-byte addressing is enabled, extended address register settings are ignored.
Enhanced Volatile Configuration Register
Table 16: Enhanced Volatile Configuration Register Bit Definitions
Note 1 applies to entire table
Bit
Name
Settings
Description
Notes
7
Quad I/O protocol
0 = Enabled
Enables or disables quad I/O protocol.
1 = Disabled (Default,
extended SPI protocol)
2
6
Dual I/O protocol
0 = Enabled
Enables or disables dual I/O protocol.
1 = Disabled (Default,
extended SPI protocol)
2
5
Reserved
x = Default
0b = Fixed value.
4
Reset/hold
0 = Disabled
1 = Enabled (Default)
Enables or disables hold or reset.
(Available on dedicated part numbers.)
3
VPP accelerator
0 = Enabled
1 = Disabled (Default)
Enables or disables VPP acceleration for QUAD
INPUT FAST PROGRAM and QUAD INPUT EXTENDED FAST PROGRAM OPERATIONS.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Table 16: Enhanced Volatile Configuration Register Bit Definitions (Continued)
Note 1 applies to entire table
Bit
Name
2:0
Settings
Output driver strength 000 = Reserved
001 = 90 Ohms
010 = 60 Ohms
011 = 45 Ohms
100 = Reserved
101 = 20 Ohms
110 = 15 Ohms
111 = 30 (Default)
Notes:
Description
Notes
Optimizes impedance at VCC/2 output voltage.
1. Settings determine the device memory configuration upon a change of those settings by
the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. The register is
read from or written to in all protocols by READ ENHANCED VOLATILE CONFIGURATION
REGISTER or WRITE ENHANCED VOLATILE CONFIGURATION REGISTER commands, respectively.
2. If bits 6 and 7 are both set to 0, the device operates in quad I/O. When either bit 6 or 7 is
reset to 0, the device operates in dual I/O or quad I/O respectively following the next
WRITE ENHANCED VOLATILE CONFIGURATION command.
Flag Status Register
Table 17: Flag Status Register Bit Definitions
Note 1 applies to entire table
Bit Name
Settings
Description
Notes
7
Program or
erase
controller
0 = Busy
1 = Ready
Status bit: Indicates whether one of the following
command cycles is in progress: WRITE STATUS
REGISTER, WRITE NONVOLATILE CONFIGURATION
REGISTER, PROGRAM, or ERASE.
6
Erase suspend
0 = Not in effect
1 = In effect
Status bit: Indicates whether an ERASE operation has
been or is going to be suspended.
5
Erase
0 = Clear
1 = Failure or protection error
Error bit: Indicates whether an ERASE operation has
succeeded or failed.
3, 4
4
Program
0 = Clear
1 = Failure or protection error
Error bit: Indicates whether a PROGRAM operation has
succeeded or failed; also an attempt to program a 0 to
a 1 when VPP = VPPH and the data pattern is a multiple
of 64 bits.
3, 4
3
VPP
0 = Enabled
1 = Disabled (Default)
Error bit: Indicates an invalid voltage on VPP during a
PROGRAM or ERASE operation.
3, 4
2
Program suspend
0 = Not in effect
1 = In effect
Status bit: Indicates whether a PROGRAM operation
has been or is going to be suspended.
2
1
Protection
0 = Clear
1 = Failure or protection error
Error bit: Indicates whether an ERASE or PROGRAM
operation has attempted to modify the protected array
sector, or whether a PROGRAM operation has attempted to access the locked OTP space.
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26
2, 5
2
3, 4
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Table 17: Flag Status Register Bit Definitions (Continued)
Note 1 applies to entire table
Bit Name
Settings
0
Addressing
0 = 3 bytes addressing
1 = 4 bytes addressing
Notes:
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Description
Notes
Status bit: Indicates whether 3-byte or 4-byte address
mode is enabled.
2
1.
2.
3.
4.
Register bits are read by READ FLAG STATUS REGISTER command. All bits are volatile.
Status bits are reset automatically.
Error bits must be cleared through the CLEAR FLAG STATUS REGISTER command.
These error flags are "sticky." They must be cleared through the CLEAR STATUS REGISTER command.
5. Program or erase controller bit = NOT (write in progress bit).
27
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Command Definitions
Command Definitions
Table 18: Command Set
Note 1 applies to entire table
Code
Extended
Dual
I/O
Quad
I/O
Data
Bytes
Notes
RESET ENABLE
66h
Yes
Yes
Yes
0
2
RESET MEMORY
99h
Command
RESET Operations
IDENTIFICATION Operations
READ ID
9E/9Fh
Yes
No
No
1 to 20
2
MULTIPLE I/O READ ID
AFh
No
Yes
Yes
1 to 3
2
READ SERIAL FLASH
DISCOVERY PARAMETER
5Ah
Yes
Yes
Yes
1 to ∞
3
READ
03h
Yes
No
No
1 to ∞
4
FAST READ
0Bh
Yes
Yes
Yes
DUAL OUTPUT FAST READ
3Bh
Yes
Yes
No
DUAL INPUT/OUTPUT FAST READ
0Bh
3Bh
BBh
Yes
Yes
No
QUAD OUTPUT FAST READ
6Bh
Yes
No
Yes
QUAD INPUT/OUTPUT FAST READ
0Bh
6Bh
EBh
Yes
No
Yes
FAST READ – DTR
0Dh
Yes
Yes
Yes
1 to ∞
6
DUAL OUTPUT FAST READ – DTR
3Dh
Yes
Yes
No
1 to ∞
6
DUAL INPUT/OUTPUT FAST READ – DTR
0Dh
3Dh
BDh
Yes
Yes
No
1 to ∞
6
QUAD OUTPUT FAST READ – DTR
6Dh
Yes
No
Yes
1 to ∞
6
QUAD INPUT/OUTPUT FAST READ – DTR
0Dh
6Dh
EDh
Yes
No
Yes
1 to ∞
7
4-BYTE READ
13h
Yes
Yes
Yes
1 to ∞
8
4-BYTE FAST READ
0Ch
4-BYTE DUAL OUTPUT FAST READ
3Ch
Yes
Yes
No
1 to ∞
4-BYTE DUAL INPUT/OUTPUT FAST
READ
BCh
Yes
Yes
No
4-BYTE QUAD OUTPUT FAST READ
6Ch
Yes
No
Yes
4-BYTE QUAD INPUT/OUTPUT FAST
READ
ECh
Yes
No
Yes
READ Operations
5
1 to ∞
5
5, 11
1 to ∞
5
5, 12
9
9
9, 11
1 to ∞
9
10, 12
WRITE Operations
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Command Definitions
Table 18: Command Set (Continued)
Note 1 applies to entire table
Code
Extended
Dual
I/O
Quad
I/O
Data
Bytes
Notes
WRITE ENABLE
06h
Yes
Yes
Yes
0
2
WRITE DISABLE
04h
Yes
Yes
Yes
1 to ∞
2
1
2, 13, 15
Command
REGISTER Operations
READ STATUS REGISTER
05h
WRITE STATUS REGISTER
01h
READ LOCK REGISTER
E8h
WRITE LOCK REGISTER
E5h
READ FLAG STATUS REGISTER
70h
CLEAR FLAG STATUS REGISTER
50h
READ NONVOLATILE
CONFIGURATION REGISTER
B5h
WRITE NONVOLATILE
CONFIGURATION REGISTER
B1h
READ VOLATILE
CONFIGURATION REGISTER
85h
WRITE VOLATILE
CONFIGURATION REGISTER
81h
READ ENHANCED VOLATILE
CONFIGURATION REGISTER
65h
WRITE ENHANCED VOLATILE
CONFIGURATION REGISTER
61h
READ EXTENDED ADDRESS REGISTER
C8h
WRITE EXTENDED ADDRESS REGISTER
C5h
Yes
Yes
Yes
1 to ∞
4
1
4, 13
Yes
Yes
Yes
1 to ∞
2
0
Yes
Yes
Yes
2
2
2, 13, 15
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1 to ∞
2
1
2, 13
1 to ∞
2
1
2, 13
0
2
2, 16
PROGRAM Operations
PAGE PROGRAM
02h
Yes
Yes
Yes
1 to 256
4, 13, 14
4-BYTE PAGE PROGRAM
12h
Yes
Yes
Yes
1 to 256
4, 13, 14, 17
DUAL INPUT FAST PROGRAM
A2h
Yes
Yes
No
1 to 256
4, 13, 14
EXTENDED DUAL INPUT
FAST PROGRAM
02h
A2h
D2h
Yes
Yes
No
QUAD INPUT FAST PROGRAM
32h
Yes
No
Yes
4-BYTE QUAD INPUT FAST PROGRAM
34h
Yes
No
Yes
4, 13, 14, 17
02h
32h
12h/38h
Yes
No
Yes
4, 12, 13, 14,
18
SUBSECTOR ERASE
20h
Yes
Yes
Yes
4-BYTE SUBSECTOR ERASE
21h
EXTENDED QUAD INPUT
FAST PROGRAM
4, 11, 13, 14
1 to 256
4, 13, 14
ERASE Operations
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0
4, 13, 14
4, 13, 14, 17
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Command Definitions
Table 18: Command Set (Continued)
Note 1 applies to entire table
Code
Extended
Dual
I/O
Quad
I/O
Data
Bytes
Notes
SECTOR ERASE
D8h
Yes
Yes
Yes
0
4, 13, 14
4-BYTE SECTOR ERASE
DCh
DIE ERASE
C4h
Yes
Yes
Yes
0
4, 13, 14
BULK ERASE
C7h
Yes
Yes
Yes
0
13, 14, 17
PROGRAM/ERASE RESUME
7Ah
Yes
Yes
Yes
0
2, 13, 14
PROGRAM/ERASE SUSPEND
75h
Yes
Yes
Yes
1 to 64
5
Command
4, 13, 14, 17
ONE-TIME PROGRAMMABLE (OTP) Operations
READ OTP ARRAY
4Bh
PROGRAM OTP ARRAY
42h
4, 13, 14
4-BYTE ADDRESS MODE Operations
ENTER 4-BYTE ADDRESS MODE
B7h
EXIT 4-BYTE ADDRESS MODE
E9h
Yes
Yes
Yes
0
2, 16
Yes
Yes
Yes
0
2, 17
QUAD Operations
ENTER QUAD
35h
EXIT QUAD
F5h
2, 17
DEEP POWER-DOWN Operations
ENTER DEEP POWER-DOWN
B9h
RELEASE from DEEP POWER-DOWN
ABh
Notes:
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Yes
Yes
Yes
0
2
1. Yes in the protocol columns indicates that the command is supported and has the same
functionality and command sequence as other commands marked Yes.
2. Address bytes = 0. Dummy clock cycles = 0.
3. Address bytes = 3. Dummy clock cycles default = 8.
4. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles = 0.
5. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles default = 8. Dummy clock cycles default = 10 (when quad SPI protocol is enabled). Dummy
clock cycles are configurable by the user.
6. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles default = 6. Dummy clock cycles default = 8 when quad SPI protocol is enabled. Dummy
clock cycles are configurable by the user.
7. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles default = 8. Dummy clock cycles are configurable by the user.
8. Address bytes = 4. Dummy clock cycles = 0.
9. Address bytes = 4. Dummy clock cycles default = 8. Dummy clock cycles default = 10
(when quad SPI protocol is enabled). Dummy clock cycles are configurable by the user.
10. Address bytes = 4. Dummy clock cycles default = 10. Dummy clock cycles is configurable
by the user.
11. When the device is in dual SPI protocol, the command can be entered with any of these
three codes. The different codes enable compatibility between dual SPI and extended
SPI protocols.
30
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
Command Definitions
12. When the device is in quad SPI protocol, the command can be entered with any of these
three codes. The different codes enable compatibility between quad SPI and extended
SPI protocols.
13. The WRITE ENABLE command must be issued first before this command can be executed.
14. Requires the READ FLAG STATUS REGISTER command being issued with at least one byte
output. (After code, at least 8 clock pulses in extended SPI, 4 clock pulses in dual I/O SPI,
and 2 clock pulses in quad I/O SPI.) The cycle is not complete until bit 7 of the flag status
register outputs 1.
15. The end of operation can be detected by means of a READ FLAG STATUS REGISTER command being issued twice, S# toggled between command execution, and bit 7 of the flag
status register outputs 1 both times.
16. Except for line items that enable the additional RESET# pin, the WRITE ENABLE command must be issued first before this command can be executed.
17. These commands are only available for line items that enable the additional RESET# pin.
18. The code 38h is only valid for line items that enable the additional RESET# pin; otherwise, code 12h is valid.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
READ REGISTER and WRITE REGISTER Operations
READ STATUS REGISTER or FLAG STATUS REGISTER Command
To initiate a READ STATUS REGISTER command, S# is driven LOW. For extended SPI
protocol, the command code is input on DQ0, and output on DQ1. For dual SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0]. The operation is
terminated by driving S# HIGH at any time during data output.
The status register can be read continuously and at any time, including during a PROGRAM, ERASE, or WRITE operation.
The flag status register can be read continuously and at any time, including during an
ERASE or WRITE operation.
If one of these operations is in progress, checking the write in progress bit or program or
erase controller bit is recommended before executing the command.
The flag status register must be read any time a PROGRAM, ERASE, or SUSPEND/
RESUME command is issued, or after a RESET command while device is busy. The cycle
is not complete until bit 7 of the flag status register outputs 1. Refer to Command Definitions for more information.
The end of operations such as power-up, WRITE STATUS REGISTER, and WRITE NONVOLATILE CONFIGURATION REGISTER can be detected by means of a READ FLAG STATUS REGISTER command being issued twice to poll the flag status register for both die,
S# toggled between command execution, and bit 7 of the flag status register outputs 1
both times.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
Figure 10: READ REGISTER Command
Extended
0
7
9
8
10
11
12
13
14
15
C
LSB
Command
DQ0
MSB
LSB
DOUT
High-Z
DQ1
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
MSB
Dual
0
3
4
5
6
7
C
LSB
LSB
DOUT
DOUT
Command
DQ[1:0]
MSB
DOUT
DOUT
DOUT
MSB
Quad
0
1
2
3
C
LSB
Command
DQ[3:0]
MSB
Notes:
DOUT
LSB
DOUT
DOUT
Don’t Care
MSB
1. Supports all READ REGISTER commands except READ LOCK REGISTER.
2. A READ NONVOLATILE CONFIGURATION REGISTER operation will output data starting
from the least significant byte.
READ NONVOLATILE CONFIGURATION REGISTER Command
To execute a READ NONVOLATILE CONFIGURATION REGISTER command, S# is driven LOW. For extended SPI protocol, the command code is input on DQ0, and output on
DQ1. For dual SPI protocol, the command code is input on DQ[1:0], and output on
DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0], and is output
on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data
output.
The nonvolatile configuration register can be read continuously. After all 16 bits of the
register have been read, a 0 is output. All reserved fields output a value of 1.
READ VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command
To execute a READ VOLATILE CONFIGURATION REGISTER command or a READ ENHANCED VOLATILE CONFIGURATION REGISTER command, S# is driven LOW. For extended SPI protocol, the command code is input on DQ0, and output on DQ1. For dual
SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad
SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data output.
When the register is read continuously, the same byte is output repeatedly.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
READ EXTENDED ADDRESS REGISTER Command
To initiate a READ EXTENDED ADDRESS REGISTER command, S# is driven LOW. For
extended SPI protocol, the command code is input on DQ0, and output on DQ1. For
dual SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For
quad SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0].
The operation is terminated by driving S# HIGH at any time during data output.
When the register is read continuously, the same byte is output repeatedly.
WRITE STATUS REGISTER Command
To issue a WRITE STATUS REGISTER command, the WRITE ENABLE command must be
executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until the
eighth bit of the last data byte has been latched in, after which it must be driven HIGH.
For extended SPI protocol, the command code is input on DQ0, followed by the data
bytes. For dual SPI protocol, the command code is input on DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code is input on DQ[3:0], followed by the
data bytes. When S# is driven HIGH, the operation, which is self-timed, is initiated; its
duration is tW.
This command is used to write new values to status register bits 7:2, enabling software
data protection. The status register can also be combined with the W#/V PP signal to
provide hardware data protection. The WRITE STATUS REGISTER command has no effect on status register bits 1:0.
When the operation is in progress, the program or erase controller bit of the flag status
register is set to 0. To obtain the operation status, the flag status register must be polled
twice, with S# toggled twice in between commands. When the operation completes, the
program or erase controller bit is cleared to 1. The end of operation can be detected
when the flag status register outputs the program or erase controller bit to 1 both times.
When the maximum time achieved (see AC Characteristics and Operating Conditions),
polling the flag status register twice is not required.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
Figure 11: WRITE REGISTER Command
Extended
0
7
8
9
10
11
12
13
15
14
C
LSB
LSB
DIN
Command
DQ0
MSB
Dual
DIN
DIN
DIN
DIN
DIN
DIN
DIN
MSB
0
3
4
5
6
7
C
LSB
MSB
Quad
LSB
DIN
Command
DQ[1:0]
DIN
DIN
DIN
DIN
MSB
0
1
2
3
C
LSB
Command
DQ[3:0]
MSB
Notes:
LSB
DIN
DIN
DIN
MSB
1. Supports all WRITE REGISTER commands except WRITE LOCK REGISTER.
2. A WRITE NONVOLATILE CONFIGURATION REGISTER operation requires data being sent
starting from least significant byte. For this command, the data in consists of two bytes.
WRITE NONVOLATILE CONFIGURATION REGISTER Command
To execute the WRITE NONVOLATILE CONFIGURATION REGISTER command, the
WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# is
driven LOW and held LOW until the 16th bit of the last data byte has been latched in,
after which it must be driven HIGH. For extended SPI protocol, the command code is
input on DQ0, followed by two data bytes. For dual SPI protocol, the command code is
input on DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code
is input on DQ[3:0], followed by the data bytes. When S# is driven HIGH, the operation,
which is self-timed, is initiated; its duration is tWNVCR.
When the operation is in progress, the program or erase controller bit of the flag status
register is set to 0. To obtain the operation status, the flag status register must be polled
twice, with S# toggled twice in between commands. When the operation completes, the
program or erase controller bit is cleared to 1. The end of operation can be detected
when the flag status register outputs the program or erase controller bit to 1 both times.
When the maximum time achieved (see AC Characteristics and Operating Conditions),
polling the flag status register twice is not required.
WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command
To execute a WRITE VOLATILE CONFIGURATION REGISTER command or a WRITE
ENHANCED VOLATILE CONFIGURATION REGISTER command, the WRITE ENABLE
command must be executed to set the write enable latch bit to 1. S# is driven LOW and
held LOW until the eighth bit of the last data byte has been latched in, after which it
must be driven HIGH. For extended SPI protocol, the command code is input on DQ0,
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DIN
512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
followed by the data bytes. For dual SPI protocol, the command code is input on
DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code is input
on DQ[3:0], followed by the data bytes.
Because register bits are volatile, change to the bits is immediate. After the data is latched in, S# must be driven HIGH. Reserved bits are not affected by this command.
WRITE EXTENDED ADDRESS REGISTER Command
To initiate a WRITE EXTENDED ADDRESS REGISTER command, the WRITE ENABLE
command must be executed to set the write enable latch bit to 1.
Note: The WRITE ENABLE command is not necessary on line items that enable the additional RESET# pin.
S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0, followed by the data bytes. For dual SPI protocol, the command code is input on DQ[1:0],
followed by the data bytes. For quad SPI protocol, the command code is input on
DQ[3:0], followed by the data bytes.
Because register bits are volatile, change to the bits is immediate. After the data is latched in, S# must be driven HIGH. Reserved bits are not affected by this command.
READ LOCK REGISTER Command
To execute the READ LOCK REGISTER command, S# is driven LOW. For extended SPI
protocol, the command code is input on DQ0, followed by address bytes that point to a
location in the sector. For dual SPI protocol, the command code is input on DQ[1:0]. For
quad SPI protocol, the command code is input on DQ[3:0]. Each address bit is latched
in during the rising edge of the clock. For extended SPI protocol, data is shifted out on
DQ1 at a maximum frequency fC during the falling edge of the clock. For dual SPI protocol, data is shifted out on DQ[1:0], and for qual SPI protocol, data is shifted out on
DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data output.
When the register is read continuously, the same byte is output repeatedly. Any READ
LOCK REGISTER command that is executed while an ERASE, PROGRAM, or WRITE cycle is in progress is rejected with no affect on the cycle in progress.
Table 19: Lock Register
Note 1 applies to entire table
Bit
Name
Settings
7:2
1
Reserved
0
Write lock down 0 = Cleared (Default)
1 = Set
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Description
Bit values are 0.
Volatile bit: the device always powers-up with this bit cleared, which
means sector lock down and sector write lock bits can be set.
When this bit set, neither of the lock register bits can be written to
until the next power cycle.
36
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
Table 19: Lock Register (Continued)
Note 1 applies to entire table
Bit
Name
Settings
0
Sector write lock 0 = Cleared (Default)
1 = Set
Note:
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Description
Volatile bit: the device always powers-up with this bit cleared, which
means that PROGRAM and ERASE operations in this sector can be
executed and sector content modified.
When this bit is set, PROGRAM and ERASE operations in this sector
will not be executed.
1. Sector lock register bits 1:0 are written to by the WRITE LOCK REGISTER command. The
command will not execute unless the sector lock down bit is cleared.
37
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
Figure 12: READ LOCK REGISTER Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ[0]
MSB
A[MAX]
DOUT
High-Z
DQ1
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
MSB
Dual
0
3
4
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[1:0]
MSB
A[MAX]
Quad
0
1
MSB
2
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[3:0]
MSB
Note:
A[MAX]
LSB
DOUT
DOUT
Don’t Care
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + ((A[MAX] + 1)/2).
For quad SPI protocol, Cx = 1 + ((A[MAX] + 1)/4).
WRITE LOCK REGISTER Command
To initiate the WRITE LOCK REGISTER command, the WRITE ENABLE command must
be executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until
the eighth bit of the last data byte has been latched in, after which it must be driven
HIGH. The command code is input on DQn, followed by address bytes that point to a
location in the sector, and then one data byte that contains the desired settings for lock
register bits 0 and 1.
When execution is complete, the write enable latch bit is cleared within tSHSL2 and no
error bits are set. Because lock register bits are volatile, change to the bits is immediate.
WRITE LOCK REGISTER can be executed when an ERASE SUSPEND operation is in effect. After the data is latched in, S# must be driven HIGH.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ REGISTER and WRITE REGISTER Operations
Figure 13: WRITE LOCK REGISTER Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
LSB
Command
DQ0
MSB
Dual
A[MAX]
0
3
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
MSB
4
Cx
C
LSB
A[MIN]
LSB
Command
DQ[1:0]
MSB
Quad
A[MAX]
0
1
DIN
MSB
2
Cx
C
LSB
A[MIN]
LSB
Command
DQ[3:0]
MSB
A[MAX]
Note:
DIN
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + ((A[MAX] + 1)/2).
For quad SPI protocol, Cx = 1 + ((A[MAX] + 1)/4).
CLEAR FLAG STATUS REGISTER Command
To execute the CLEAR FLAG STATUS REGISTER command and clear the error bits
(erase, program, and protection), S# is driven LOW. For extended SPI protocol, the command code is input on DQ0. For dual SPI protocol, the command code is input on
DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0]. The operation
is terminated by driving S# HIGH at any time.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ IDENTIFICATION Operations
READ IDENTIFICATION Operations
READ ID and MULTIPLE I/O READ ID Commands
To execute the READ ID or MULTIPLE I/O READ ID commands, S# is driven LOW and
the command code is input on DQn. The device outputs the information shown in the
tables below. If an ERASE or PROGRAM cycle is in progress when the command is executed, the command is not decoded and the command cycle in progress is not affected.
When S# is driven HIGH, the device goes to standby. The operation is terminated by
driving S# HIGH at any time during data output.
Table 20: Data/Address Lines for READ ID and MULTIPLE I/O READ ID Commands
Command Name
READ ID
MULTIPLE I/O READ ID
Note:
Data In
Data Out
Unique ID
is Output
Extended
Dual
Quad
DQ0
DQ0
Yes
Yes
No
No
DQ[3:0]
DQ[1:0]
No
No
Yes
Yes
1. Yes in the protocol columns indicates that the command is supported and has the same
functionality and command sequence as other commands marked Yes.
Table 21: Read ID Data Out
Size
(Bytes)
Name
Content Value
1
Manufacturer ID
20h
JEDEC
2
Device ID
Memory Type
BBh
Manufacturer
Memory Capacity
20h (512Mb)
17
Assigned by
Unique ID
1 Byte: Length of data to follow
10h
2 Bytes: Extended device ID and device
configuration information
ID and information such as uniform
architecture, and HOLD
or RESET functionality
14 Bytes: Customized factory data
Optional
Note:
Factory
1. The 17 bytes of information in the unique ID is read by the READ ID command, but cannot be read by the MULTIPLE I/O READ ID command.
Table 22: Extended Device ID, First Byte
Bit 7
Bit 6
Bit 51
Bit 42
Bit 3
Bit 2
Reserved
Reserved
1 = Alternate BP
scheme
0 = Standard BP
scheme
Volatile configuration
register bit setting:
0 = Micron XIP
1 = Basic XIP
HOLD#/RESET#:
0 = HOLD
1 = RESET
Addressing:
0 = by byte
Notes:
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Bit 1
Bit 0
Architecture:
00 = Uniform
1. For alternate BP scheme information, contact the factory.
2. For more information, contact the factory.
40
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ IDENTIFICATION Operations
Figure 14: READ ID and MULTIPLE I/O Read ID Commands
Extended (READ ID)
0
7
16
15
8
31
32
C
LSB
DQ0
Command
MSB
LSB
DOUT
DOUT
High-Z
DQ1
MSB
DOUT
MSB
Manufacturer
identification
Dual (MULTIPLE I/O READ ID )
0
LSB
DOUT
3
MSB
UID
Device
identification
8
7
4
LSB
DOUT
DOUT
15
C
LSB
DQ[1:0]
LSB
DOUT
DOUT
Command
MSB
MSB
DOUT
MSB
Manufacturer
identification
Quad (MULTIPLE I/O READ ID )
0
LSB
DOUT
1
Device
identification
4
3
2
7
C
LSB
DQ[3:0]
Command
MSB
DOUT
LSB
DOUT
MSB
LSB
DOUT
MSB
Manufacturer
identification
Note:
DOUT
Device
identification
Don’t Care
1. The READ ID command is represented by the extended SPI protocol timing shown first.
The MULTIPLE I/O READ ID command is represented by the dual and quad SPI protocols
are shown below extended SPI protocol.
READ SERIAL FLASH DISCOVERY PARAMETER Command
To execute READ SERIAL FLASH DISCOVERY PARAMETER command, S# is driven
LOW. The command code is input on DQ0, followed by three address bytes and eight
dummy clock cycles (address is always 3 bytes, even if the device is configured to work
in 4-byte address mode). The device outputs the information starting from the specified
address. When the 2048-byte boundary is reached, the data output wraps to address 0 of
the serial Flash discovery parameter table. The operation is terminated by driving S#
HIGH at any time during data output.
The operation always executes in continuous mode so the read burst wrap setting in the
volatile configuration register does not apply.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ IDENTIFICATION Operations
Table 23: Serial Flash Discovery Parameter Data Structure
Compliant with JEDEC standard JC-42.4 1775.03
Address
(Byte Mode)
Address (Bit)
Data
00h
7:0
53h
01h
15:08
46h
02h
23:16
44h
03h
31:24
50h
Minor revision
04h
7:0
00h
Major revision
05h
15:8
01h
Description
Serial Flash discoverable parameters signature
Serial Flash discoverable parameters
Number of parameter headers
06h
7:0
00h
Reserved
07h
15:8
FFh
Parameter ID (0) JEDEC-defined parameter table
08h
7:0
00h
Parameter
Minor revision
09h
15:8
00h
Major revision
0Ah
23:16
01h
Parameter length (DW)
0Bh
31:24
09h
Parameter table pointer
0Ch
7:0
30h
0Dh
15:8
00h
0Eh
23:16
00h
0Fh
31:24
FFh
Byte
Address
Bits
512Mb
Data
30h
1:0
01b
Write granularity
2
1
WRITE ENABLE command required for writing to volatile status registers
3
0
WRITE ENABLE command selected for writing to volatile status registers
4
0
7:5
111b
7:0
20h
Reserved
Table 24: Parameter ID
Description
Minimum block/sector erase sizes
Reserved
4KB ERASE command
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31h
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ IDENTIFICATION Operations
Table 24: Parameter ID (Continued)
Byte
Address
Bits
512Mb
Data
32h
0
1
2:1
01b
Supports double transfer rate clocking
3
1
Supports DUAL INPUT/OUTPUT FAST READ operation (dual input address, dual output)
4
1
Supports QUAD INPUT/OUTPUT FAST READ operation (quad input
address, quad output)
5
1
Supports QUAD OUTPUT FAST READ operation (single input address,
quad output)
6
1
Reserved
7
1
Description
Supports DUAL OUTPUT FAST READ operation (single input address,
dual output)
Number of address bytes used (3-byte or 4-byte) for array READ,
WRITE, and ERASE commands
Reserved
33h
7:0
FFh
Flash size (bits)
34h
7:0
FFh
35h
7:0
FFh
36h
7:0
FFh
37h
7:0
1Fh
38h
4:0
01001b
7:5
001b
Number of dummy clock cycles required before valid output from
QUAD INPUT/OUTPUT FAST READ operation
Number of XIP confirmation bits for QUAD INPUT/OUTPUT FAST
READ operation
Command code for QUAD INPUT/OUTPUT FAST READ operation
39h
7:0
EBh
Number of dummy clock cycles required before valid output from
QUAD OUTPUT FAST READ operation
3Ah
4:0
00111b
7:5
001b
Number of XIP confirmation bits for QUAD OUTPUT FAST READ operation
Command code for QUAD OUTPUT FAST READ operation
3Bh
7:0
6Bh
Number of dummy clock cycles required before valid output from
DUAL OUTPUT FAST READ operation
3Ch
4:0
00111b
7:5
001b
Number of XIP confirmation bits for DUAL OUTPUT FAST READ operation
Command code for DUAL OUTPUT FAST READ operation
3Dh
7:0
3Bh
Number of dummy clock cycles required before valid output from
DUAL INPUT/OUTPUT FAST READ operation
3Eh
4:0
00111b
7:5
001b
7:0
BBh
Number of XIP confirmation bits for DUAL INPUT/OUTPUT FAST
READ
Command code for DUAL INPUT/OUTPUT FAST READ operation
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43
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ IDENTIFICATION Operations
Table 24: Parameter ID (Continued)
Description
Supports FAST READ operation in dual SPI protocol
Byte
Address
Bits
512Mb
Data
40h
0
1
3:1
111b
4
1
Reserved
Supports FAST READ operation in quad SPI protocol
Reserved
7:5
111b
Reserved
43:41h
FFFFFFh
FFFFFFh
Reserved
45:44h
FFFFh
FFFFh
46h
4:0
00111b
7:5
001b
47h
7:0
BBh
49:48h
FFFFh
FFFFh
4Ah
4:0
01001b
7:5
001b
Number of dummy clock cycles required before valid output from
FAST READ operation in dual SPI protocol
Number of XIP confirmation bits for FAST READ operation in dual SPI
protocol
Command code for FAST READ operation in dual SPI protocol
Reserved
Number of dummy clock cycles required before valid output from
FAST READ operation in quad SPI protocol
Number of XIP confirmation bits for FAST READ operation in quad
SPI protocol
Command code for FAST READ operation in quad SPI protocol
4Bh
7:0
EBh
Sector type 1 size (4k)
4Ch
7:0
0Ch
Sector type 1 command code (4k)
4Dh
7:0
20h
Sector type 2 size (64KB)
4Eh
7:0
10h
Sector type 2 command code 64KB)
4Fh
7:0
D8h
Sector type 3 size (not present)
50h
7:0
00h
Sector type 3 size (not present)
51h
7:0
00h
Sector type 4 size (not present)
52h
7:0
00h
Sector type 4 size (not present)
53h
7:0
00h
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
READ MEMORY Operations
The device supports default reading and writing to an A[MAX:MIN] of A[23:0] (3-byte
address).
Reading and writing to an A[MAX:MIN] of A[31:0] (4-byte address) is also supported. Selection of the 3-byte or 4-byte address range can be enabled in two ways: through the
nonvolatile configuration register or through the ENABLE 4-BYTE ADDRESS MODE/
EXIT 4-BYTE ADDRESS MODE commands. Further details for these settings and commands are in the respective register and command sections of the data sheet.
After any READ command is executed, the device will output data from the selected address in the die. After a die boundary is reached, the device will start reading again from
the beginning of the same 256Mb die.
A complete device reading is completed by executing read twice.
3-Byte Address
To execute READ MEMORY commands, S# is driven LOW. The command code is input
on DQn, followed by input on DQn of three address bytes. Each address bit is latched in
during the rising edge of the clock. The addressed byte can be at any location, and the
address automatically increments to the next address after each byte of data is shifted
out; therefore, a die can be read with a single command. The operation is terminated by
driving S# HIGH at any time during data output.
Table 25: Command/Address/Data Lines for READ MEMORY Commands
Note 1 applies to entire table
Command Name
DUAL
QUAD
DUAL OUTPUT INPUT/OUTPUT QUAD OUTPUT INPUT/OUTPUT
FAST READ
FAST READ
FAST READ
FAST READ
READ
FAST
READ
STR Mode
03
0B
3B
BB
6B
EB
DTR Mode
–
0D
3D
BD
6D
ED
Extended SPI Protocol
Supported
Yes
Yes
Yes
Yes
Yes
Yes
Command Input
DQ0
DQ0
DQ0
DQ0
DQ0
DQ0
Address Input
DQ0
DQ0
DQ0
DQ[1:0]
DQ0
DQ[3:0]
Data Output
DQ1
DQ1
DQ[1:0]
DQ[1:0]
DQ[3:0]
DQ[3:0]
No
Yes
Yes
Yes
No
No
Command Input
–
DQ[1:0]
DQ[1:0]
DQ[1:0]
–
–
Address Input
–
DQ[1:0]
DQ[1:0]
DQ[1:0]
–
–
Data Output
–
DQ[1:0]
DQ[1:0]
DQ[1:0]
–
–
No
Yes
No
No
Yes
Yes
Command Input
–
DQ[3:0]
–
–
DQ[3:0]
DQ[3:0]
Address Input
–
DQ[3:0]
–
–
DQ[3:0]
DQ[3:0]
Dual SPI Protocol
Supported
Quad SPI Protocol
Supported
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Table 25: Command/Address/Data Lines for READ MEMORY Commands (Continued)
Note 1 applies to entire table
Command Name
DUAL
QUAD
DUAL OUTPUT INPUT/OUTPUT QUAD OUTPUT INPUT/OUTPUT
FAST READ
FAST READ
FAST READ
FAST READ
READ
FAST
READ
STR Mode
03
0B
3B
BB
DTR Mode
–
0D
3D
BD
6D
ED
Data Output
–
DQ[3:0]
–
–
DQ[3:0]
DQ[3:0]
Notes:
6B
EB
1. Yes in the "Supported' row for each protocol indicates that the command in that column is supported; when supported, a command's functionality is identical for the entire
column regardless of the protocol. For example, a FAST READ functions the same for all
three protocols even though its data is input/output differently depending on the protocol.
2. FAST READ is similar to READ, but requires dummy clock cycles following the address
bytes and can operate at a higher frequency (fC).
4-Byte Address
To execute 4-byte READ MEMORY commands, S# is driven LOW. The command code is
input on DQn, followed by input on DQn of four address bytes. Each address bit is
latched in during the rising edge of the clock. The addressed byte can be at any location,
and the address automatically increments to the next address after each byte of data is
shifted out; therefore, a die can be read with a single command. The operation is terminated by driving S# HIGH at any time during data output.
Table 26: Command/Address/Data Lines for READ MEMORY Commands – 4-Byte Address
Notes 1 and 2 apply to entire table
Command Name (4-Byte Address)
DUAL OUTPUT
FAST READ
DUAL
INPUT/OUTPUT
FAST READ
QUAD OUTPUT
FAST READ
QUAD
INPUT/OUTPUT
FAST READ
READ
FAST
READ
STR Mode
03/13
0B/0C
3B/3C
BB/BC
6B/6C
EB/EC
DTR Mode
–
0D
3D
BD
6D
ED
Extended SPI Protocol
Supported
Yes
Yes
Yes
Yes
Yes
Yes
Command Input
DQ0
DQ0
DQ0
DQ0
DQ0
DQ0
Address Input
DQ0
DQ0
DQ0
DQ[1:0]
DQ0
DQ[3:0]
Data Output
DQ1
DQ1
DQ[1:0]
DQ[1:0]
DQ[3:0]
DQ[3:0]
No
Yes
Yes
Yes
No
No
Command Input
–
DQ[1:0]
DQ[1:0]
DQ[1:0]
–
–
Address Input
–
DQ[1:0]
DQ[1:0]
DQ[1:0]
–
–
Data Output
–
DQ[1:0]
DQ[1:0]
DQ[1:0]
–
–
Dual SPI Protocol
Supported
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Table 26: Command/Address/Data Lines for READ MEMORY Commands – 4-Byte Address (Continued)
Notes 1 and 2 apply to entire table
Command Name (4-Byte Address)
READ
FAST
READ
DUAL OUTPUT
FAST READ
DUAL
INPUT/OUTPUT
FAST READ
QUAD OUTPUT
FAST READ
QUAD
INPUT/OUTPUT
FAST READ
STR Mode
03/13
0B/0C
3B/3C
BB/BC
6B/6C
EB/EC
DTR Mode
–
0D
3D
BD
6D
ED
No
Yes
No
No
Yes
Yes
Command Input
–
DQ[3:0]
–
–
DQ[3:0]
DQ[3:0]
Address Input
–
DQ[3:0]
–
–
DQ[3:0]
DQ[3:0]
Data Output
–
DQ[3:0]
–
–
DQ[3:0]
DQ[3:0]
Quad SPI Protocol
Supported
Notes:
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1. Yes in the "Supported' row for each protocol indicates that the command in that column is supported; when supported, a command's functionality is identical for the entire
column regardless of the protocol. For example, a FAST READ functions the same for all
three protocols even though its data is input/output differently depending on the protocol.
2. Command codes 13, 0C, 3C, BC, 6C, and EC do not need to be set up in the addressing
mode; they will work directly in 4-byte addressing mode.
3. A 4-BYTE FAST READ command is similar to 4-BYTE READ operation, but requires dummy clock cycles following the address bytes and can operate at a higher frequency (fC).
47
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Figure 15: READ Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ[0]
MSB
A[MAX]
DOUT
High-Z
DQ1
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
MSB
Don’t Care
Note:
1. Cx = 7 + (A[MAX] + 1).
READ MEMORY Operations Timing – Single Transfer Rate
Figure 16: FAST READ Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ0
MSB
A[MAX]
DQ1
DOUT
High-Z
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
MSB
Dummy cycles
Dual
0
3
4
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[1:0]
MSB
A[MAX]
MSB
Dummy cycles
Quad
0
1
2
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[3:0]
MSB
A[MAX]
LSB
DOUT
DOUT
MSB
Don’t Care
Dummy cycles
Note:
1. For extended protocol, Cx = 7 + (A[MAX] + 1).
For dual protocol, Cx = 3 + (A[MAX] + 1)/2.
For quad protocol, Cx = 1 + (A[MAX] + 1)/4.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Figure 17: DUAL OUTPUT FAST READ Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ0
MSB
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
A[MAX]
High-Z
DQ1
DOUT
MSB
Dummy cycles
Dual
0
3
4
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[1:0]
MSB
A[MAX]
DOUT
MSB
Dummy cycles
Notes:
1. Cx = 7 + (A[MAX] + 1).
2. Shown here is the DUAL OUTPUT FAST READ timing for the extended SPI protocol. The
dual timing shown for the FAST READ command is the equivalent of the DUAL OUTPUT
FAST READ timing for the dual SPI protocol.
Figure 18: DUAL INPUT/OUTPUT FAST READ Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ0
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
MSB
High-Z
DQ1
A[MAX]
DOUT
MSB
Dummy cycles
Dual
0
3
4
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[1:0]
MSB
A[MAX]
DOUT
MSB
Dummy cycles
Notes:
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1. Cx = 7 + (A[MAX] + 1)/2.
2. Shown here is the DUAL INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The dual timing shown for the FAST READ command is the equivalent of the DUAL
INPUT/OUTPUT FAST READ timing for the dual SPI protocol.
49
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Figure 19: QUAD OUTPUT FAST READ Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
DOUT
LSB
DOUT
DOUT
High-Z
DOUT
DOUT
DOUT
‘1’
DOUT
DOUT
DOUT
Command
DQ0
MSB
DQ[2:1]
DQ3
A[MAX]
MSB
Dummy cycles
Quad
0
1
2
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[3:0]
MSB
A[MAX]
LSB
DOUT
DOUT
MSB
Dummy cycles
Notes:
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1. Cx = 7 + (A[MAX] + 1).
2. Shown here is the QUAD OUTPUT FAST READ timing for the extended SPI protocol. The
quad timing shown for the FAST READ command is the equivalent of the QUAD OUTPUT FAST READ timing for the quad SPI protocol.
50
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Figure 20: QUAD INPUT/OUTPUT FAST READ Command
Extended
0
7
8
Cx
C
LSB
DQ0
Command
A[MIN]
DOUT
LSB
DOUT
DOUT
High-Z
DOUT
DOUT
DOUT
‘1’
DOUT
DOUT
DOUT
MSB
DQ[2:1]
DQ3
A[MAX]
MSB
Dummy cycles
Quad
0
1
2
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[3:0]
MSB
A[MAX]
LSB
DOUT
DOUT
MSB
Dummy cycles
Notes:
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1. Cx = 7 + (A[MAX] + 1)/4.
2. Shown here is the QUAD INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The quad timing shown for the FAST READ command is the equivalent of the QUAD
INPUT/OUTPUT FAST READ timing for the quad SPI protocol.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
READ MEMORY Operations Timing – Double Transfer Rate
Figure 21: FAST READ Command – DTR
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ0
MSB
A[MAX]
DQ1
DOUT
High-Z
LSB
DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT
MSB
Dummy cycles
Dual
0
3
4
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[1:0]
MSB
A[MAX]
LSB
DOUT DOUT DOUT DOUT DOUT DOUT DOUT
MSB
Dummy cycles
Quad
0
1
2
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[3:0]
MSB
A[MAX]
LSB
DOUT DOUT DOUT
MSB
Don’t Care
Dummy cycles
Note:
1. For extended protocol, Cx = 7 + (A[MAX] + 1)/2.
For dual protocol, Cx = 3 + (A[MAX] + 1)/4.
For quad protocol, Cx = 1 + (A[MAX] + 1)/8.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Figure 22: DUAL OUTPUT FAST READ Command – DTR
Extended
0
7
8
Cx
C
LSB
DQ0
A[MIN]
Command
MSB
DOUT
LSB
DOUT DOUT DOUT DOUT DOUT DOUT DOUT
DOUT
DOUT DOUT DOUT DOUT DOUT DOUT DOUT
A[MAX]
High-Z
DQ1
MSB
Dummy cycles
Dual
0
3
4
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[1:0]
A[MAX]
MSB
DOUT DOUT
DOUT DOUT
DOUT DOUT
LSB
DOUT
MSB
Dummy cycles
Notes:
1. Cx = 7 + (A[MAX] + 1)/2.
2. Shown here is the DUAL OUTPUT FAST READ timing for the extended SPI protocol. The
dual timing shown for the FAST READ command is the equivalent of the DUAL OUTPUT
FAST READ timing for the dual SPI protocol.
Figure 23: DUAL INPUT/OUTPUT FAST READ Command – DTR
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ0
DOUT
LSB
DOUT DOUT DOUT DOUT DOUT DOUT DOUT
DOUT
DOUT DOUT DOUT DOUT DOUT DOUT DOUT
MSB
High-Z
DQ1
A[MAX]
MSB
Dummy cycles
Dual
0
3
4
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[1:0]
MSB
A[MAX]
LSB
DOUT DOUT DOUT DOUT DOUT DOUT DOUT
MSB
Dummy cycles
Notes:
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1. Cx = 7 + (A[MAX] + 1)/4.
2. Shown here is the DUAL INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The dual timing shown for the FAST READ command is the equivalent of the DUAL
INPUT/OUTPUT FAST READ timing for the dual SPI protocol.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
Figure 24: QUAD OUTPUT FAST READ Command – DTR
Extended
0
7
8
Cx
C
LSB
A[MIN]
DOUT
LSB
DOUT DOUT DOUT
High-Z
DOUT
DOUT DOUT DOUT
‘1’
DOUT
DOUT DOUT DOUT
Command
DQ0
MSB
A[MAX]
DQ[2:1]
DQ3
MSB
Dummy cycles
Quad
0
1
2
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[3:0]
MSB
A[MAX]
LSB
DOUT DOUT DOUT
MSB
Dummy cycles
Notes:
1. Cx = 7 + (A[MAX] + 1)/2.
2. Shown here is the QUAD OUTPUT FAST READ timing for the extended SPI protocol. The
quad timing shown for the FAST READ command is the equivalent of the QUAD OUTPUT FAST READ timing for the quad SPI protocol.
Figure 25: QUAD INPUT/OUTPUT FAST READ Command – DTR
Extended
0
7
8
Cx
C
LSB
DQ0
Command
A[MIN]
DOUT
LSB
DOUT DOUT DOUT
High-Z
DOUT
DOUT DOUT DOUT
DOUT
DOUT DOUT DOUT
MSB
DQ[2:1]
‘1’
DQ3
A[MAX]
MSB
Dummy cycles
Quad
0
1
2
Cx
C
LSB
A[MIN]
DOUT
Command
DQ[3:0]
MSB
A[MAX]
LSB
DOUT DOUT DOUT
MSB
Dummy cycles
Notes:
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1. Cx = 7 + (A[MAX] + 1)/8.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
READ MEMORY Operations
2. Shown here is the QUAD INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The quad timing shown for the FAST READ command is the equivalent of the QUAD
INPUT/OUTPUT FAST READ timing for the quad SPI protocol.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
PROGRAM Operations
PROGRAM Operations
PROGRAM commands are initiated by first executing the WRITE ENABLE command to
set the write enable latch bit to 1. S# is then driven LOW and held LOW until the eighth
bit of the last data byte has been latched in, after which it must be driven HIGH. The
command code is input on DQ0, followed by input on DQ[n] of address bytes and at
least one data byte. Each address bit is latched in during the rising edge of the clock.
When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is
tPP.
If the bits of the least significant address, which is the starting address, are not all zero,
all data transmitted beyond the end of the current page is programmed from the starting address of the same page. If the number of bytes sent to the device exceed the maximum page size, previously latched data is discarded and only the last maximum pagesize number of data bytes are guaranteed to be programmed correctly within the same
page. If the number of bytes sent to the device is less than the maximum page size, they
are correctly programmed at the specified addresses without any effect on the other
bytes of the same page.
When the operation is in progress, the program or erase controller bit of the flag status
register is set to 0. The write enable latch bit is cleared to 0, whether the operation is
successful or not. The status register and flag status register can be polled for the operation status. The operation is considered complete after bit 7 of the flag status register
outputs 1 with at least one byte output. When the operation completes, the program or
erase controller bit is cleared to 1.
If the operation times out, the write enable latch bit is reset and the program fail bit is
set to 1. If S# is not driven HIGH, the command is not executed, flag status register error
bits are not set, and the write enable latch remains set to 1. When a command is applied
to a protected sector, the command is not executed, the write enable latch bit remains
set to 1, and flag status register bits 1 and 4 are set.
Note that the flag status register must be polled even if operation times out.
Table 27: Data/Address Lines for PROGRAM Commands
Note 1 applies to entire table
Command Name
Data In
Address In
Extended
Dual
Quad
DQ0
DQ0
Yes
Yes
Yes
DUAL INPUT FAST PROGRAM
DQ[1:0]
DQ0
Yes
Yes
No
EXTENDED DUAL INPUT
FAST PROGRAM
DQ[1:0]
DQ[1:0]
Yes
Yes
No
QUAD INPUT FAST PROGRAM
DQ[3:0]
DQ0
Yes
No
Yes
EXTENDED QUAD INPUT
FAST PROGRAM
DQ[3:0]
DQ[3:0]
Yes
No
Yes
PAGE PROGRAM
Note:
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1. Yes in the protocol columns indicates that the command is supported and has the same
functionality and command sequence as other commands marked Yes.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
PROGRAM Operations
Figure 26: PAGE PROGRAM Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
LSB
Command
DQ0
MSB
Dual
A[MAX]
0
3
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
MSB
4
Cx
C
LSB
A[MIN]
LSB
Command
DQ[1:0]
MSB
Quad
A[MAX]
0
1
DIN
MSB
2
Cx
C
LSB
A[MIN]
LSB
Command
DQ[3:0]
MSB
A[MAX]
Note:
DIN
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.
For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
PROGRAM Operations
Figure 27: DUAL INPUT FAST PROGRAM Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
Command
DQ0
MSB
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
A[MAX]
High-Z
DQ1
LSB
DIN
MSB
Dual
0
3
4
Cx
C
LSB
A[MIN]
LSB
DIN
Command
DQ[1:0]
MSB
Note:
A[MAX]
DIN
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.
Figure 28: EXTENDED DUAL INPUT FAST PROGRAM Command
Extended
0
7
8
Cx
C
LSB
DQ0
A[MIN]
LSB
Command
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
MSB
High-Z
DQ1
A[MAX]
Dual
0
3
MSB
4
Cx
C
LSB
DQ[1:0]
A[MIN]
LSB
Command
MSB
Note:
A[MAX]
DIN
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/2.
For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
PROGRAM Operations
Figure 29: QUAD INPUT FAST PROGRAM Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
LSB
Command
DQ0
MSB
DIN
DIN
DIN
DIN
DIN
DIN
DIN
A[MAX]
High-Z
DQ[3:1]
DIN
MSB
Quad
0
1
2
Cx
C
LSB
A[MIN]
LSB
Command
DQ[3:0]
MSB
Note:
A[MAX]
DIN
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/4.
For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
PROGRAM Operations
Figure 30: EXTENDED QUAD INPUT FAST PROGRAM Command
Extended
0
7
8
Cx
C
LSB
A[MIN]
LSB
DIN
DIN
DIN
High-Z
DIN
DIN
DIN
‘1’
DIN
DIN
DIN
DIN
DIN
Command
DQ0
MSB
DQ[2:1]
DQ3
A[MAX]
Quad
0
1
MSB
2
Cx
C
LSB
A[MIN]
LSB
Command
DQ[3:0]
MSB
Note:
A[MAX]
DIN
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/4.
For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
WRITE Operations
WRITE Operations
WRITE ENABLE Command
The WRITE ENABLE operation sets the write enable latch bit. To execute a WRITE ENABLE command, S# is driven LOW and held LOW until the eighth bit of the command
code has been latched in, after which it must be driven HIGH. The command code is
input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and on
DQ[3:0] for quad SPI protocol.
The write enable latch bit must be set before every PROGRAM, ERASE, WRITE, ENTER
4-BYTE ADDRESS MODE, and EXIT 4-BYTE ADDRESS MODE command. If S# is not
driven HIGH after the command code has been latched in, the command is not executed, flag status register error bits are not set, and the write enable latch remains cleared
to its default setting of 0.
WRITE DISABLE Command
The WRITE DISABLE operation clears the write enable latch bit. To execute a WRITE
DISABLE command, S# is driven LOW and held LOW until the eighth bit of the command code has been latched in, after which it must be driven HIGH. The command
code is input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and
on DQ[3:0] for quad SPI protocol.
If S# is not driven HIGH after the command code has been latched in, the command is
not executed, flag status register error bits are not set, and the write enable latch remains set to 1.
Note: In case of a protection error, write disable will not clear the write enable latch. In
this situation, a CLEAR FLAG STATUS REGISTER command must be issued to clear
both flags.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
WRITE Operations
Figure 31: WRITE ENABLE and WRITE DISABLE Command Sequence
Extended
0
1
2
3
4
5
6
7
C
S#
Command Bits
DQ0
0
0
0
0
0
LSB
1
1
0
MSB
High-Z
DQ1
Dual
0
1
2
3
C
S#
Command Bits
DQ0
DQ1
LSB
0
0
1
0
0
0
0
1
MSB
Quad
0
1
C
S#
Command Bits LSB
DQ0
0
0
DQ1
0
1
DQ2
0
1
DQ3
0
0
Don’t Care
MSB
Note:
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1. Shown here is the WRITE ENABLE command code, which is 06h or 0000 0110 binary. The
WRITE DISABLE command sequence is identical, except the WRITE DISABLE command
code is 04h or 0000 0100 binary.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ERASE Operations
ERASE Operations
When the operation is in progress, the program or erase controller bit of the flag status
register is set to 0. The flag status register must be polled for the operation status. When
the operation completes, that bit is cleared to 1.
Note that the flag status register must be polled even if operation times out.
SUBSECTOR ERASE Command
To execute the SUBSECTOR ERASE command (and set the selected subsector bits to
FFh), the WRITE ENABLE command must be issued to set the write enable latch bit to
1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been
latched in, after which it must be driven HIGH. The command code is input on DQ0,
followed by address bytes; any address within the subsector is valid. Each address bit is
latched in during the rising edge of the clock. When S# is driven HIGH, the operation,
which is self-timed, is initiated; its duration is tSSE. The operation can be suspended
and resumed by the PROGRAM/ERASE SUSPEND and PROGRAM/ERASE RESUME
commands, respectively.
If the write enable latch bit is not set, the device ignores the SUBSECTOR ERASE command and no error bits are set to indicate operation failure.
When the operation is in progress, the program or erase controller bit is set to 0. The
write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. The operation
is considered complete once bit 7 of the flag status register outputs 1 with at least one
byte output. When the operation completes, the program or erase controller bit is
cleared to 1.
If the operation times out, the write enable latch bit is reset and the erase error bit is set
to 1. If S# is not driven HIGH, the command is not executed, flag status register error
bits are not set, and the write enable latch remains set to 1. When a command is applied
to a protected subsector, the command is not executed. Instead, the write enable latch
bit remains set to 1, and flag status register bits 1 and 5 are set.
SECTOR ERASE Command
To execute the SECTOR ERASE command (and set selected sector bits to FFh), the
WRITE ENABLE command must be issued to set the write enable latch bit to 1. S# is
driven LOW and held LOW until the eighth bit of the last data byte has been latched in,
after which it must be driven HIGH. The command code is input on DQ0, followed by
address bytes; any address within the sector is valid. Each address bit is latched in during the rising edge of the clock. When S# is driven HIGH, the operation, which is selftimed, is initiated; its duration is tSE. The operation can be suspended and resumed by
the PROGRAM/ERASE SUSPEND and PROGRAM/ERASE RESUME commands, respectively.
If the write enable latch bit is not set, the device ignores the SECTOR ERASE command
and no error bits are set to indicate operation failure.
When the operation is in progress, the program or erase controller bit is set to 0. The
write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. The operation
is considered complete once bit 7 of the flag status register outputs 1 with at least one
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ERASE Operations
byte output. When the operation completes, the program or erase controller bit is
cleared to 1.
If the operation times out, the write enable latch bit is reset and erase error bit is set to
1. If S# is not driven HIGH, the command is not executed, flag status register error bits
are not set, and the write enable latch remains set to 1. When a command is applied to a
protected sector, the command is not executed. Instead, the write enable latch bit remains set to 1, and flag status register bits 1 and 5 are set.
Figure 32: SUBSECTOR and SECTOR ERASE Command
Extended
0
7
8
Cx
C
A[MIN]
LSB
DQ0
Command
A[MAX]
MSB
Dual
0
3
4
Cx
C
LSB
DQ0[1:0]
A[MIN]
Command
MSB
Quad
A[MAX]
0
1
2
Cx
C
LSB
MSB
Note:
A[MIN]
Command
DQ0[3:0]
A[MAX]
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.
For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.
DIE ERASE Command
To initiate the DIE ERASE command, the WRITE ENABLE command must be issued to
set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of
the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0, followed by address bytes; any address within the single
256Mb die is valid. Each address bit is latched in during the rising edge of the clock.
When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is
tDSE.
If the write enable latch bit is not set, the device ignores the DIE ERASE command and
no error bits are set to indicate operation failure.
When the operation is in progress, the program or erase controller bit is set to 0. The
write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. The operation
is considered complete once bit 7 of the flag status register outputs 1 with at least one
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ERASE Operations
byte output. When the operation completes, the program or erase controller bit is
cleared to 1.
The command is not executed if any sector is locked. Instead, the write enable latch bit
remains set to 1, and flag status register bits 1 and 5 are set.
Figure 33: DIE ERASE Command
Extended
0
7
8
Cx
C
LSB
DQ0
A[MIN]
Command
MSB
Dual
A[MAX]
0
3
4
Cx
C
LSB
DQ0[1:0]
A[MIN]
Command
MSB
Quad
A[MAX]
0
1
2
Cx
C
LSB
MSB
Note:
A[MIN]
Command
DQ0[3:0]
A[MAX]
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.
For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.
BULK ERASE Command
The BULK ERASE command is valid for line items that enable the additional RESET#
pin. To initiate the BULK ERASE command, the WRITE ENABLE command must be issued to set the write enable latch bit to 1. S# is driven LOW and held LOW until the
eighth bit of the last data byte has been latched in, after which it must be driven HIGH.
The command code is input on DQ0. When S# is driven HIGH, the operation, which is
self-timed, is initiated; its duration is tBE.
If the write enable latch bit is not set, the device ignores the SECTOR ERASE command
and no error bits are set to indicate operation failure.
When the operation is in progress, the write in progress bit is set to 1 and the write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. When the operation
completes, the write in progress bit is cleared to 0.
If the operation times out, the write enable latch bit is reset and erase error bit is set to
1. If S# is not driven HIGH, the command is not executed, the flag status register error
bits are not set, and the write enable latch remains set to 1.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ERASE Operations
The command is not executed if any sector is locked. Instead, the write enable latch bit
remains set to 1, and flag status register bits 1 and 5 are set.
Figure 34: BULK ERASE Command
Extended
0
7
C
LSB
Command
DQ0
MSB
Dual
0
3
C
LSB
Command
DQ0[1:0]
MSB
Quad
0
1
C
LSB
Command
DQ0[3:0]
MSB
PROGRAM/ERASE SUSPEND Command
To initiate the PROGRAM/ERASE SUSPEND command, S# is driven LOW. The command code is input on DQ0. The operation is terminated by the PROGRAM/ERASE RESUME command.
PROGRAM/ERASE SUSPEND command enables the memory controller to interrupt
and suspend an array PROGRAM or ERASE operation within the program/erase latency.
If a SUSPEND command is issued during a PROGRAM operation, then the flag status
register bit 2 is set to 1. After erase/program latency time, the flag status register bit 7 is
also set to 1, but the device is considered in suspended state once bit 7 of the flag status
register outputs 1 with at least one byte output. In the suspended state, the device is
waiting for any operation. (See the Operations Allowed/Disallowed During Device
States table.)
If a SUSPEND command is issued during an ERASE operation, then the flag status register bit 6 is set to 1. After erase/program latency time, the flag status register bit 7 is also
set to 1, but the device is considered in suspended state once bit 7 of the flag status register outputs 1 with at least one byte output. In the suspended state, the device is waiting for any operation. (See the Operations Allowed/Disallowed During Device States table.)
If the time remaining to complete the operation is less than the suspend latency, the device completes the operation and clears the flag status register bits 2 or 6, as applicable.
Because the suspend state is volatile, if there is a power cycle, the suspend state information is lost and the flag status register powers up as 80h.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ERASE Operations
During an ERASE SUSPEND operation, a PROGRAM or READ operation is possible in
any sector except the one in a suspended state. Reading from a sector that is in a suspended state will output indeterminate data. The device ignores a PROGRAM command to a sector that is in an erase suspend state; it also sets the flag status register bit 4
to 1, program failure/protection error, and leaves the write enable latch bit unchanged.
The commands allowed during an erase suspend state are shown in the Operations Allowed/Disallowed During Device States table. When the ERASE resumes, it does not
check the new lock status of the WRITE LOCK REGISTER command.
During a PROGRAM SUSPEND operation, a READ operation is possible in any page except the one in a suspended state. Reading from a page that is in a suspended state will
output indeterminate data. The commands allowed during a program suspend state include the WRITE VOLATILE CONFIGURATION REGISTER command and the WRITE
ENHANCED VOLATILE CONFIGURATION REGISTER command.
It is possible to nest a PROGRAM/ERASE SUSPEND operation inside a PROGRAM/
ERASE SUSPEND operation just once. Issue an ERASE command and suspend it. Then
issue a PROGRAM command and suspend it also. With the two operations suspended,
the next PROGRAM/ERASE RESUME command resumes the latter operation, and a second PROGRAM/ERASE RESUME command resumes the former (or first) operation.
Table 28: Suspend Parameters
Parameter
Condition
Typ
Max
Units
Notes
Erase to suspend
Sector erase or erase resume to erase suspend
700
–
µs
1
Program to suspend
Program resume to program suspend
5
–
µs
1
Subsector erase to suspend
Subsector erase or subsector erase resume to erase suspend
50
–
µs
1
Suspend latency
Program
7
–
µs
2
Suspend latency
Subsector erase
15
–
µs
2
Suspend latency
Erase
15
–
µs
3
Notes:
1. Timing is not internally controlled.
2. Any READ command accepted.
3. Any command except the following are accepted: SECTOR, SUBSECTOR, or DIE ERASE;
WRITE STATUS REGISTER; WRITE NONVOLATILE CONFIGURATION REGISTER; and PROGRAM OTP.
Table 29: Operations Allowed/Disallowed During Device States
Note 1 applies to entire table
Standby
Operation
State
Program or
Erase State
Subsector Erase Suspend or
Program Suspend State
Erase Suspend
State
Notes
READ
Yes
No
Yes
Yes
2
PROGRAM
Yes
No
No
Yes/No
3
ERASE
Yes
No
No
No
4
WRITE
Yes
No
No
No
5
WRITE
Yes
No
Yes
Yes
6
READ
Yes
Yes
Yes
Yes
7
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ERASE Operations
Table 29: Operations Allowed/Disallowed During Device States (Continued)
Note 1 applies to entire table
Standby
Operation
State
SUSPEND
No
Notes:
Program or
Erase State
Subsector Erase Suspend or
Program Suspend State
Erase Suspend
State
Notes
Yes
No
No
8
1. The device can be in only one state at a time. Depending on the state of the device,
some operations are allowed (Yes) and others are not (No). For example, when the device is in the standby state, all operations except SUSPEND are allowed in any sector. For
all device states except the erase suspend state, if an operation is allowed or disallowed
in one sector, it is allowed or disallowed in all other sectors. In the erase suspend state, a
PROGRAM operation is allowed in any sector except the one in which an ERASE operation has been suspended.
2. All READ operations except READ STATUS REGISTER and READ FLAG REGISTER. When issued to a sector or subsector that is simultaneously in an erase suspend state, the READ
operation is accepted, but the data output is not guaranteed until the erase has completed.
3. All PROGRAM operations except PROGRAM OTP. In the erase suspend state, a PROGRAM
operation is allowed in any sector (Yes) except the sector (No) in which an ERASE operation has been suspended.
4. Applies to the SECTOR ERASE or SUBSECTOR ERASE operation.
5. Applies to the following operations: WRITE STATUS REGISTER, WRITE NONVOLATILE
CONFIGURATION REGISTER, PROGRAM OTP, and DIE ERASE.
6. Applies to the WRITE VOLATILE CONFIGURATION REGISTER, WRITE ENHANCED VOLATILE CONFIGURATION REGISTER, WRITE ENABLE, WRITE DISABLE, CLEAR FLAG STATUS
REGISTER, WRITE EXTENDED ADDRESS REGISTER, ENTER 4-BYTE EXTENDED ADDRESS
REGISTER, EXIT 4-BYTE EXTENDED ADDRESS REGISTER, or WRITE LOCK REGISTER operation.
7. Applies to the READ STATUS REGISTER or READ FLAG STATUS REGISTER operation.
8. Applies to the PROGRAM SUSPEND or ERASE SUSPEND operation.
PROGRAM/ERASE RESUME Command
To initiate the PROGRAM/ERASE RESUME command, S# is driven LOW. The command
code is input on DQ0. The operation is terminated by driving S# HIGH.
When this command is executed, the status register write in progress bit is set to 1, and
the flag status register program erase controller bit is set to 0. This command is ignored
if the device is not in a suspended state.
When the operation is in progress, the program or erase controller bit of the flag status
register is set to 0. The flag status register must be polled for the operation status. When
the operation completes, that bit is cleared to 1. Note that the flag status register must
be polled even if operation times out.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
RESET Operations
RESET Operations
Table 30: Reset Command Set
Command
Command Code (Binary)
Command Code (Hex)
Address Bytes
RESET ENABLE
0110 0110
66
0
RESET MEMORY
1001 1001
99
0
RESET ENABLE and RESET MEMORY Command
To reset the device, the RESET ENABLE command must be followed by the RESET
MEMORY command. To execute each command, S# is driven LOW. The command code
is input on DQ0. A minimum de-selection time of tSHSL2 must come between the RESET ENABLE and RESET MEMORY commands or a reset is not guaranteed. When these
two commands are executed and S# is driven HIGH, the device enters a power-on reset
condition. A time of tSHSL3 is required before the device can be re-selected by driving
S# LOW. It is recommended that the device exit XIP mode before executing these two
commands to initiate a reset.
If a reset is initiated while a WRITE, PROGRAM, or ERASE operation is in progress or
suspended, the operation is aborted and data may be corrupted.
Figure 35: RESET ENABLE and RESET MEMORY Command
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
C
Reset enable
Reset memory
S#
DQ0
Note:
1. The number of lines and rate for transmission varies with extended, dual, or quad SPI.
RESET Conditions
All volatile lock bits, the volatile configuration register, the enhanced volatile configuration register, and the extended address register are reset to the power-on reset default
condition. The power-on reset condition depends on settings in the nonvolatile configuration register.
Reset is effective once bit 7 of the flag status register outputs 1 with at least one byte
output. A RESET ENABLE command is not accepted in the cases of WRITE STATUS
REGISTER and WRITE NONVOLATILE CONFIGURATION REGISTER operations.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ONE-TIME PROGRAMMABLE Operations
ONE-TIME PROGRAMMABLE Operations
READ OTP ARRAY Command
To initiate a READ OTP ARRAY command, S# is driven LOW. The command code is input on DQ0/DQ4, followed by address bytes and dummy clock cycles. Each address bit
is latched in during the rising edge of C. Data is shifted out on DQ1/DQ5, beginning
from the specified address and at a maximum frequency of fC (MAX) on the falling edge
of the clock. The address increments automatically to the next address after each byte of
data is shifted out. There is no rollover mechanism; therefore, if read continuously, after
location 0x40, the device continues to output data at location 0x40. The operation is terminated by driving S# HIGH at any time during data output.
Figure 36: READ OTP Command
Extended
0
7
8
Cx
C, C_1, C_2
LSB
A[MIN]
Command
DQ0/DQ4
MSB
A[MAX]
DQ1/DQ4
DOUT
High-Z
DOUT
DOUT
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
DOUT
DOUT
LSB
DOUT
DOUT
MSB
Dummy cycles
Dual
0
3
4
Cx
C, C_1, C_2
LSB
DQ[1:0]/DQ[6:5]
A[MIN]
DOUT
Command
MSB
A[MAX]
MSB
Dummy cycles
Quad
0
1
2
Cx
C, C_1, C_2
LSB
DQ[3:0]/DQ[7:4]
A[MIN]
DOUT
Command
MSB
A[MAX]
LSB
DOUT
DOUT
MSB
Don’t Care
Dummy cycles
Note:
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.
For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.
PROGRAM OTP ARRAY Command
To initiate the PROGRAM OTP ARRAY command, the WRITE ENABLE command must
be issued to set the write enable latch bit to 1; otherwise, the PROGRAM OTP ARRAY
command is ignored and flag status register bits are not set. S# is driven LOW and held
LOW until the eighth bit of the last data byte has been latched in, after which it must be
driven HIGH. The command code is input on DQ0/DQ4, followed by address bytes and
at least one data byte. Each address bit is latched in during the rising edge of the clock.
When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is
tPOTP. There is no rollover mechanism; therefore, after a maximum of 65 bytes are
latched in the subsequent bytes are discarded.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ONE-TIME PROGRAMMABLE Operations
PROGRAM OTP ARRAY programs, at most, 64 bytes to the OTP memory area and one
OTP control byte. When the operation is in progress, the write in progress bit is set to 1.
The write enable latch bit is cleared to 0, whether the operation is successful or not, and
the status register and flag status register can be polled for the operation status. When
the operation completes, the write in progress bit is cleared to 0.
If the operation times out, the write enable latch bit is reset and the program fail bit is
set to 1. If S# is not driven HIGH, the command is not executed, flag status register error
bits are not set, and the write enable latch remains set to 1. The operation is considered
complete once bit 7 of the flag status register outputs 1 with at least one byte output.
The OTP control byte (byte 64) is used to permanently lock the OTP memory array.
Table 31: OTP Control Byte (Byte 64)
Bit Name
0
OTP control byte
Settings
Description
0 = Locked
1 = Unlocked (Default)
Used to permanently lock the 64-byte OTP array. When bit 0 = 1,
the 64-byte OTP array can be programmed. When bit 0 = 0, the
64-byte OTP array is read only.
Once bit 0 has been programmed to 0, it can no longer be
changed to 1. Program OTP array is ignored, the write enable
latch bit remains set, and flag status register bits 1 and 4 are set.
Figure 37: PROGRAM OTP Command
Extended
0
7
8
Cx
C, C_1, C_2
LSB
A[MIN]
LSB
Command
DQ0/DQ4
MSB
A[MAX]
Dual
0
3
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
DIN
MSB
4
Cx
C, C_1, C_2
LSB
A[MIN]
LSB
Command
DQ[1:0]/DQ[6:5]
MSB
A[MAX]
Quad
0
1
DIN
MSB
2
Cx
C, C_1, C_2
LSB
A[MIN]
LSB
Command
DQ[3:0]/DQ[7:4]
MSB
Note:
A[MAX]
DIN
MSB
1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).
For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.
For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
ADDRESS MODE Operations – Enter and Exit 4-Byte Address
Mode
ADDRESS MODE Operations – Enter and Exit 4-Byte Address Mode
ENTER or EXIT 4-BYTE ADDRESS MODE Command
Both ENTER 4-BYTE ADDRESS MODE and EXIT 4-BYTE ADDRESS MODE commands
share the same requirements.
To enter or exit the 4-byte address mode, the WRITE ENABLE command must be executed to set the write enable latch bit to 1.
Note: The WRITE ENABLE command is not necessary for line items that enable the additional RESET# pin.
S# must be driven LOW. The command must be input on DQn. The effect of the command is immediate; after the command has been executed, the write enable latch bit is
cleared to 0.
The default address mode is three bytes, and the device returns to the default upon exiting the 4-byte address mode.
ENTER or EXIT QUAD Command
The ENTER or EXIT QUAD (QPI) command is only available for line items that enable
the additional RESET# pin. To initiate this command, the WRITE ENABLE command
must not be executed. S# must be driven LOW, and the command must be input on
DQn. The effect of the command is immediate.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
XIP Mode
XIP Mode
Execute-in-place (XIP) mode allows the memory to be read by sending an address to the
device and then receiving the data on one, two, or four pins in parallel, depending on
the customer requirements. XIP mode offers maximum flexibility to the application,
saves instruction overhead, and reduces random access time.
Activate or Terminate XIP Using Volatile Configuration Register
Applications that boot in SPI and must switch to XIP use the volatile configuration register. XIP provides faster memory READ operations by requiring only an address to execute, rather than a command code and an address.
To activate XIP requires two steps. First, enable XIP by setting volatile configuration register bit 3 to 0. Next, drive the XIP confirmation bit to 0 during the next FAST READ operation. XIP is then active. Once in XIP, any command that occurs after S# is toggled requires only address bits to execute; a command code is not necessary, and device operations use the SPI protocol that is enabled. XIP is terminated by driving the XIP confirmation bit to 1. The device automatically resets volatile configuration register bit 3 to 1.
Note: For devices with basic XIP, indicated by a part number feature set digit of 2 or 4, it
is not necessary to set the volatile configuration register bit 3 to 0 to enable XIP. Instead,
it is enabled by setting the XIP confirmation bit to 0 during the first dummy clock cycle
after any FAST READ command.
Activate or Terminate XIP Using Nonvolatile Configuration Register
Applications that must boot directly in XIP use the nonvolatile configuration register. To
enable a device to power-up in XIP using the nonvolatile configuration register, set nonvolatile configuration register bits [11:9]. Settings vary according to protocol, as explained in the Nonvolatile Configuration Register section. Because the device boots directly in XIP, after the power cycle, no command code is necessary. XIP is terminated by
driving the XIP confirmation bit to 1.
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512Mb, 1.8V, Multiple I/O Serial Flash Memory
XIP Mode
Figure 38: XIP Mode Directly After Power-On
Mode 3
C
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 16
Mode 0
tVSI
VCC
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