MX25U12835F
MX25U12835F
1.8V, 128M-BIT [x 1/x 2/x 4]
CMOS MXSMIO® (SERIAL MULTI I/O)
FLASH MEMORY
Key Features
• 1.65 to 2.0 volt for read, erase, and program operations
• Multi I/O Support - Single I/O, Dual I/O and Quad I/O
• Quad Peripheral Interface (QPI) Read / Program Mode
• Program Suspend/Resume & Erase Suspend/Resume
• 23-ball WLCSP (Ball Diameter 0.30mm)
P/N: PM1728
Macronix Proprietary
1
Rev. 1.9, March 13, 2019
MX25U12835F
Contents
1. FEATURES............................................................................................................................................................... 5
2. GENERAL DESCRIPTION...................................................................................................................................... 6
Table 1. Read Performance.........................................................................................................................6
3. PIN CONFIGURATIONS .......................................................................................................................................... 7
4. PIN DESCRIPTION................................................................................................................................................... 7
5. BLOCK DIAGRAM.................................................................................................................................................... 8
6. DATA PROTECTION................................................................................................................................................. 9
Table 2. Protected Area Sizes....................................................................................................................10
Table 3. 4K-bit Secured OTP Definition..................................................................................................... 11
7. Memory Organization............................................................................................................................................ 12
Table 4. Memory Organization...................................................................................................................12
8. DEVICE OPERATION............................................................................................................................................. 13
8-1. Quad Peripheral Interface (QPI) Read Mode........................................................................................... 15
9. COMMAND DESCRIPTION.................................................................................................................................... 16
9-1.
9-2.
9-3.
9-4.
9-5.
9-6.
9-7.
9-8.
9-9.
9-10.
9-11.
9-12.
9-13.
9-14.
9-15.
9-16.
9-17.
9-18.
9-19.
9-20.
9-21.
9-22.
9-23.
9-24.
9-25.
9-26.
P/N: PM1728
Table 5. Command Set...............................................................................................................................16
Write Enable (WREN)............................................................................................................................... 20
Write Disable (WRDI)................................................................................................................................ 21
Read Identification (RDID)........................................................................................................................ 22
Release from Deep Power-down (RDP), Read Electronic Signature (RES)............................................ 23
Read Electronic Manufacturer ID & Device ID (REMS)............................................................................ 25
QPI ID Read (QPIID)................................................................................................................................ 26
Table 6. ID Definitions ...............................................................................................................................26
Read Status Register (RDSR).................................................................................................................. 27
Read Configuration Register (RDCR)....................................................................................................... 28
Write Status Register (WRSR).................................................................................................................. 33
Table 7. Protection Modes..........................................................................................................................34
Read Data Bytes (READ)......................................................................................................................... 37
Read Data Bytes at Higher Speed (FAST_READ)................................................................................... 38
Dual Read Mode (DREAD)....................................................................................................................... 40
2 x I/O Read Mode (2READ).................................................................................................................... 41
Quad Read Mode (QREAD)..................................................................................................................... 42
4 x I/O Read Mode (4READ).................................................................................................................... 43
Burst Read................................................................................................................................................ 47
Performance Enhance Mode.................................................................................................................... 48
Sector Erase (SE)..................................................................................................................................... 52
Block Erase (BE32K)................................................................................................................................ 53
Block Erase (BE)...................................................................................................................................... 54
Chip Erase (CE)........................................................................................................................................ 55
Page Program (PP).................................................................................................................................. 56
4 x I/O Page Program (4PP)..................................................................................................................... 58
Deep Power-down (DP)............................................................................................................................ 59
Enter Secured OTP (ENSO)..................................................................................................................... 60
Exit Secured OTP (EXSO)........................................................................................................................ 60
Macronix Proprietary
2
Rev. 1.9, March 13, 2019
MX25U12835F
9-27. Read Security Register (RDSCUR).......................................................................................................... 60
Table 8. Security Register Definition..........................................................................................................61
9-28. Write Security Register (WRSCUR).......................................................................................................... 61
9-29. Write Protection Selection (WPSEL)......................................................................................................... 62
9-30. Single Block Lock/Unlock Protection (SBLK/SBULK)............................................................................... 65
9-31. Read Block Lock Status (RDBLOCK)....................................................................................................... 67
9-32. Gang Block Lock/Unlock (GBLK/GBULK)................................................................................................ 67
9-33. Program Suspend and Erase Suspend ................................................................................................... 68
Table 9. Readable Area of Memory While a Program or Erase Operation is Suspended..........................68
Table 10. Acceptable Commands During Program/Erase Suspend after tPSL/tESL.................................69
Table 11. Acceptable Commands During Suspend (tPSL/tESL not required)............................................69
9-34. Program Resume and Erase Resume...................................................................................................... 70
9-35. No Operation (NOP)................................................................................................................................. 71
9-36. Software Reset (Reset-Enable (RSTEN) and Reset (RST)).................................................................... 71
9-37. Read SFDP Mode (RDSFDP)................................................................................................................... 73
Table 12. Signature and Parameter Identification Data Values .................................................................74
Table 13. Parameter Table (0): JEDEC Flash Parameter Tables...............................................................75
Table 14. Parameter Table (1): Macronix Flash Parameter Tables............................................................77
10. RESET.................................................................................................................................................................. 79
Table 15-1. Reset Timing-(Power On)........................................................................................................79
Table 15-2. Reset Timing-(Other Operation)..............................................................................................79
11. POWER-ON STATE.............................................................................................................................................. 80
12. ELECTRICAL SPECIFICATIONS......................................................................................................................... 81
Table 16. Absolute Maximum Ratings........................................................................................................81
Table 17. Capacitance TA = 25°C, f = 1.0 MHz..........................................................................................81
Table 18. DC Characteristics......................................................................................................................83
Table 19. AC Characteristics......................................................................................................................84
13. OPERATING CONDITIONS.................................................................................................................................. 86
Table 20. Power-Up Timing and VWI Threshold........................................................................................88
Table 21. Power-Up/Down and Voltage Drop ............................................................................................89
13-1. Initial Delivery State.................................................................................................................................. 89
14. ERASE AND PROGRAMMING PERFORMANCE............................................................................................... 89
15. LATCH-UP CHARACTERISTICS......................................................................................................................... 89
16. ORDERING INFORMATION................................................................................................................................. 90
17. PART NAME DESCRIPTION................................................................................................................................ 91
18. PACKAGE INFORMATION................................................................................................................................... 92
18-1. 16-pin SOP (300mil)................................................................................................................................. 92
18-2. 8-land WSON (6x5mm)............................................................................................................................ 93
18-3. 8-land WSON (8x6mm)............................................................................................................................ 94
18-4. 23-ball WLCSP (Ball Diameter 0.30mm).................................................................................................. 95
18-5. 8-pin SOP (200mil)................................................................................................................................... 96
18-6. 24-Ball BGA (5x5 ball array)..................................................................................................................... 97
19. REVISION HISTORY ............................................................................................................................................ 98
P/N: PM1728
Macronix Proprietary
3
Rev. 1.9, March 13, 2019
MX25U12835F
Figures
P/N: PM1728
Figure 1. Serial Modes Supported................................................................................................................................................13
Figure 2. Serial Input Timing.........................................................................................................................................................14
Figure 3. Output Timing................................................................................................................................................................14
Figure 4. Enable QPI Sequence (Command 35h)........................................................................................................................15
Figure 5. Reset QPI Mode (Command F5h).................................................................................................................................15
Figure 6. Write Enable (WREN) Sequence (SPI Mode)...............................................................................................................20
Figure 7. Write Enable (WREN) Sequence (QPI Mode)...............................................................................................................20
Figure 8. Write Disable (WRDI) Sequence (SPI Mode)................................................................................................................21
Figure 9. Write Disable (WRDI) Sequence (QPI Mode)...............................................................................................................21
Figure 10. Read Identification (RDID) Sequence (SPI mode only)...............................................................................................22
Figure 11. Read Electronic Signature (RES) Sequence (SPI Mode)...........................................................................................23
Figure 12. Read Electronic Signature (RES) Sequence (QPI Mode)..........................................................................................24
Figure 13. Release from Deep Power-down (RDP) Sequence (SPI Mode)................................................................................24
Figure 14. Release from Deep Power-down (RDP) Sequence (QPI Mode)................................................................................24
Figure 15. Read Electronic Manufacturer & Device ID (REMS) Sequence (SPI Mode only)......................................................25
Figure 16. Read Status Register (RDSR) Sequence (SPI Mode)................................................................................................27
Figure 17. Read Status Register (RDSR) Sequence (QPI Mode)................................................................................................27
Figure 18. Read Configuration Register (RDCR) Sequence (SPI Mode).....................................................................................28
Figure 19. Read Configuration Register (RDCR) Sequence (QPI Mode).....................................................................................28
Figure 20. Program/Erase flow with read array data....................................................................................................................29
Figure 21. Program/Erase flow without read array data (read P_FAIL/E_FAIL flag)....................................................................30
Figure 22. Write Status Register (WRSR) Sequence (SPI Mode)...............................................................................................33
Figure 23. Write Status Register (WRSR) Sequence (QPI Mode)..............................................................................................33
Figure 24. WRSR flow..................................................................................................................................................................35
Figure 25. WP# Setup Timing and Hold Timing during WRSR when SRWD=1...........................................................................36
Figure 26. Read Data Bytes (READ) Sequence (SPI Mode only)................................................................................................37
Figure 27. Read at Higher Speed (FAST_READ) Sequence (SPI Mode)....................................................................................39
Figure 28. Read at Higher Speed (FAST_READ) Sequence (QPI Mode)....................................................................................39
Figure 29. Dual Read Mode Sequence (Command 3B)...............................................................................................................40
Figure 30. 2 x I/O Read Mode Sequence (SPI Mode only)..........................................................................................................41
Figure 31. Quad Read Mode Sequence (Command 6B)..............................................................................................................42
Figure 32. 4 x I/O Read Mode Sequence (SPI Mode)..................................................................................................................44
Figure 33. 4 x I/O Read Mode Sequence (SPI Mode), for MX25U12835FZNI-08G only.............................................................44
Figure 34. 4 x I/O Read Mode Sequence (QPI Mode)..................................................................................................................45
Figure 35. 4 x I/O Read Mode Sequence (QPI Mode), for MX25U12835FZNI-08G only.............................................................45
Figure 36. W4READ (Quad Read with 4 dummy cycles) Sequence ...........................................................................................46
Figure 37. Burst Read (SPI Mode)...............................................................................................................................................47
Figure 38. Burst Read (QPI Mode)...............................................................................................................................................47
Figure 39. 4 x I/O Read Performance Enhance Mode Sequence (SPI Mode).............................................................................49
Figure 40. 4 x I/O Read Performance Enhance Mode Sequence (SPI Mode), for MX25U12835FZNI-08G only........................50
Figure 41. 4 x I/O Read Performance Enhance Mode Sequence (QPI Mode).............................................................................51
Figure 42. 4 x I/O Read Performance Enhance Mode Sequence (QPI Mode), for MX25U12835FZNI-08G only........................51
Figure 43. Sector Erase (SE) Sequence (SPI Mode)..................................................................................................................52
Figure 44. Sector Erase (SE) Sequence (QPI Mode)..................................................................................................................52
Figure 45. Block Erase 32KB (BE32K) Sequence (SPI Mode)....................................................................................................53
Figure 46. Block Erase 32KB (BE32K) Sequence (QPI Mode)...................................................................................................53
Figure 47. Block Erase (BE) Sequence (SPI Mode).....................................................................................................................54
Figure 48. Block Erase (BE) Sequence (QPI Mode)....................................................................................................................54
Figure 49. Chip Erase (CE) Sequence (SPI Mode).....................................................................................................................55
Figure 50. Chip Erase (CE) Sequence (QPI Mode).....................................................................................................................55
Figure 51. Page Program (PP) Sequence (SPI Mode).................................................................................................................57
Figure 52. Page Program (PP) Sequence (QPI Mode)................................................................................................................57
Figure 53. 4 x I/O Page Program (4PP) Sequence (SPI Mode only)............................................................................................58
Figure 54. Deep Power-down (DP) Sequence (SPI Mode)..........................................................................................................59
Figure 55. Deep Power-down (DP) Sequence (QPI Mode)..........................................................................................................59
Figure 56. Write Security Register (WRSCUR) Sequence (Command 2F)..................................................................................61
Figure 57. BP and SRWD if WPSEL=0........................................................................................................................................62
Figure 58. The individual block lock mode is effective after setting WPSEL=1............................................................................63
Figure 59. Write Protection Selection (WPSEL) Sequence (Command 68).................................................................................63
Figure 60. WPSEL Flow................................................................................................................................................................64
Figure 61. Block Lock Flow...........................................................................................................................................................65
Figure 62. Block Unlock Flow.......................................................................................................................................................66
Figure 63. Suspend to Read Latency...........................................................................................................................................68
Figure 64. Resume to Suspend Latency......................................................................................................................................70
Figure 65. Suspend to Program Latency......................................................................................................................................70
Figure 66. Resume to Read Latency............................................................................................................................................70
Figure 67. Software Reset Recovery............................................................................................................................................72
Figure 68. Reset Sequence (SPI mode).......................................................................................................................................72
Figure 69. Reset Sequence (QPI mode)......................................................................................................................................72
Figure 70. Read Serial Flash Discoverable Parameter (RDSFDP) Sequence.............................................................................73
Figure 71. RESET Timing.............................................................................................................................................................79
Figure 72. Maximum Negative Overshoot Waveform...................................................................................................................81
Figure 73. Maximum Positive Overshoot Waveform.....................................................................................................................81
Figure 74. Input Test Waveforms and Measurement Level..........................................................................................................82
Figure 75. Output Loading............................................................................................................................................................82
Figure 76. SCLK TIMING DEFINITION........................................................................................................................................82
Figure 77. AC Timing at Device Power-Up...................................................................................................................................86
Figure 78. Power-Down Sequence...............................................................................................................................................87
Figure 79. Power-up Timing..........................................................................................................................................................88
Figure 80. Power Up/Down and Voltage Drop..............................................................................................................................88
Macronix Proprietary
4
Rev. 1.9, March 13, 2019
MX25U12835F
1.8V 128M-BIT [x 1/x 2/x 4] CMOS MXSMIO® (SERIAL MULTI I/O)
FLASH MEMORY
1. FEATURES
• Deep Power Down: 1.5uA(typ.)
• Typical 100,000 erase/program cycles
• 20 years data retention
GENERAL
• Supports Serial Peripheral Interface -- Mode 0 and
Mode 3
• 134,217,728 x 1 bit structure
or 67,108,864 x 2 bits (two I/O mode) structure
or 33,554,432 x 4 bits (four I/O mode) structure
• Equal Sectors with 4K byte each, or Equal Blocks
with 32K byte each or Equal Blocks with 64K byte
each
- Any Block can be erased individually
• Single Power Supply Operation
- 1.65 to 2.0 volt for read, erase, and program operations
• Latch-up protected to 100mA from -1V to Vcc +1V
• Low Vcc write inhibit is from 1.0V to 1.4V
SOFTWARE FEATURES
• Input Data Format
- 1-byte Command code
• Advanced Security Features
- Block lock protection
The BP0-BP3 status bit defines the size of the area
to be software protection against program and erase
instructions
- Additional 4k-bit secured OTP for unique identifier
• Auto Erase and Auto Program Algorithm
- Automatically erases and verifies data at selected
sector or block
- Automatically programs and verifies data at selected page by an internal algorithm that automatically times the program pulse widths (Any page to
be programed should have page in the erased state
first)
• Status Register Feature
• Command Reset
• Program/Erase Suspend
• Electronic Identification
- JEDEC 1-byte manufacturer ID and 2-byte device ID
- RES command for 1-byte Device ID
- REMS command for 1-byte manufacturer ID and
1-byte device ID
• Support Serial Flash Discoverable Parameters
(SFDP) mode
PERFORMANCE
• High Performance
- Fast read for SPI mode
- 1 I/O: 104MHz with 8 dummy cycles
- 2 I/O: 84MHz with 4 dummy cycles,
equivalent to 168MHz
- 4 I/O: 104MHz with 2+4 dummy cycles,
equivalent to 416MHz
- 4 I/O: 133MHz with 2+6 dummy cycles,
equivalent to 532MHz
(for MX25U12835FZNI-08G only)
- Fast read for QPI mode
- 4 I/O: 84MHz with 2+2 dummy cycles,
equivalent to 336MHz
- 4 I/O: 104MHz with 2+4 dummy cycles,
equivalent to 416MHz
- 4 I/O: 133MHz with 2+6 dummy cycles,
equivalent to 532MHz
(for MX25U12835FZNI-08G only)
- Fast program time:
0.5ms(typ.) and 3ms(max.)/page (256-byte per page)
- Byte program time: 12us (typical)
- 8/16/32/64 byte Wrap-Around Burst Read Mode
- Fast erase time:
35ms (typ.)/sector (4K-byte per sector);
200ms(typ.)/block (32K-byte per block),
350ms(typ.) /block (64K-byte per block)
• Low Power Consumption
- Low active read current:
20mA(typ.) at 104MHz,
15mA(typ.) at 84MHz,
27mA(typ.) at 133MHz
(for MX25U12835FZNI-08G only)
- Low active erase current:
18mA (typ.)
at Sector Erase, Block Erase (32KB/64KB);
20mA at Chip Erase
- Low active programming current: 20mA (typ.)
- Standby current: 15uA (typ.)
P/N: PM1728
HARDWARE FEATURES
• SCLK Input - Serial clock input
• SI/SIO0 - Serial Data Input or Serial Data Input/
Output for 2 x I/O read mode and 4 x I/O read mode
• SO/SIO1 - Serial Data Output or Serial Data
Input/Output for 2 x I/O read mode and 4 x I/O read
mode
• WP#/SIO2 - Hardware write protection or serial
data Input/Output for 4 x I/O read mode
• RESET#/SIO3
- Hardware Reset pin or Serial
input & Output for 4 x I/O read mode
• PACKAGE
- 16-pin SOP (300mil)
- 8-land WSON (6x5mm)
- 8-land WSON (8x6mm)
- 23-ball WLCSP (Ball Diameter 0.30mm)
- 8-pin SOP (200mil)
- 24-Ball BGA (5x5 ball array)
All devices are RoHS Compliant and Halogen-free
Macronix Proprietary
5
Rev. 1.9, March 13, 2019
MX25U12835F
2. GENERAL DESCRIPTION
MX25U12835F is 128Mb bits Serial NOR Flash memory, which is configured as 16,777,216 x 8 internally. When it
is in two or four I/O mode, the structure becomes 67,108,864 bits x 2 or 33,554,432 bits x 4.
MX25U12835F features a serial peripheral interface and software protocol allowing operation on a simple 3-wire
bus while it is in single I/O mode. The three bus signals are a clock input (SCLK), a serial data input (SI), and a serial data output (SO). Serial access to the device is enabled by CS# input.
When it is in two I/O read mode, the SI pin and SO pin become SIO0 pin and SIO1 pin for address/dummy bits input and data output. When it is in four I/O read mode, the SI pin, SO pin, WP# pin and RESET# pin become SIO0
pin, SIO1 pin, SIO2 pin and SIO3 pin for address/dummy bits input and data output.
The MX25U12835F MXSMIO® (Serial Multi I/O) provides sequential read operation on the whole chip.
After program/erase command is issued, auto program/erase algorithms which program/erase and verify the specified page or sector/block locations will be executed. Program command is executed on byte basis, or page (256
bytes) basis, or word basis. Erase command is executed on 4K-byte sector, 32K-byte block, or 64K-byte block, or
whole chip basis.
To provide user with ease of interface, a status register is included to indicate the status of the chip. The status read
command can be issued to detect completion status of a program or erase operation via WIP bit.
Advanced security features enhance the protection and security functions, please refer to security features section
for more details.
The MX25U12835F utilizes Macronix's proprietary memory cell, which reliably stores memory contents even after
100,000 program and erase cycles.
Table 1. Read Performance
Read Performance
MX25U12835F
SPI
QPI
I/O
1 I/O
1I /2O
2 I/O
1I/4O
4 I/O
4 I/O
4 I/O
4 I/O
4 I/O
Dummy Cycle
8
8
4
8
6
8
4
6
8
MHz
104 MHz 104MHz
84 MHz
104MHz 104 MHz 133 MHz* 84 MHz
104 MHz 133 MHz*
* For MX25U12835FZNI-08G only
P/N: PM1728
Macronix Proprietary
6
Rev. 1.9, March 13, 2019
MX25U12835F
3. PIN CONFIGURATIONS
24-BALL BGA (5x5 ball array)
16-PIN SOP (300mil)
RESET#/SIO3
VCC
NC
NC
NC
NC
CS#
SO/SIO1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SCLK
SI/SIO0
NC
NC
NC
NC
GND
WP#/SIO2
5
4
3
8-WSON (6x5mm, 8x6mm)
1
2
3
4
CS#
SO/SIO1
WP#/SIO2
GND
NC
NC
RESET#
VCC
WP#/SIO2
DNU/SIO3
NC
NC
GND
NC
SI/SIO0
NC
NC
SCLK
CS#
SO/SIO1
NC
NC
NC
NC
NC
B
C
D
E
VCC
RESET#/SIO3
SCLK
SI/SIO0
8
7
6
5
8-PIN SOP (200mil)
VCC
RESET#/SIO3
SCLK
SI/SIO0
8
7
6
5
23-BALL BGA (WLCSP) TOP View
A
B
3 4
5 6
NC
NC
NC
NC
CS#
NC
NC RESET#/SIO3
SO/SIO1
NC
D
NC
SCLK
WP#/SIO2
NC
E
NC
SI/SIO0
GND
NC
F
NC
C
P/N: PM1728
VCC
NC
NC
1
4. PIN DESCRIPTION
1
2
3
4
1 2
NC
2
A
CS#
SO/SIO1
WP#/SIO2
GND
NC
NC
NC
Symbol
CS#
Description
Chip Select
Serial Data Input (for 1 x I/O)/ Serial
SI/SIO0
Data Input & Output (for 2xI/O or 4xI/O
read mode)
Serial Data Output (for 1 x I/O)/ Serial
SO/SIO1
Data Input & Output (for 2xI/O or 4xI/O
read mode)
SCLK
Clock Input
Write Protection Active low or Serial
WP#/SIO2
Data Input & Output (for 4xI/O read
mode)Note 1
Hardware Reset Pin Active low or Serial
RESET#/SIO3 Data Input & Output (for 4xI/O read
mode)Note 1
DNU/SIO3Note 2 Do Not Use or Serial Data Input &
(24BGA)
Output (for 4xI/O read mode)
VCC
+ 1.8V Power Supply
GND
Ground
Notes:
1. When using 1 I/O or 2 I/O (QE bit not enabled), the
DNU/SIO3 pin of 24BGA can not connect to GND. We
suggest user to connect this pin to VCC or floating.
2. The pin of RESET#/SIO3 or WP#/SIO2 will remain
internal pull up function while this pin is not physically
connected in system configuration.
However, the internal pull up function will be disabled if
the system has physical connection to RESET#/SIO3 or
WP#/SIO2 pin.
Macronix Proprietary
7
Rev. 1.9, March 13, 2019
MX25U12835F
5. BLOCK DIAGRAM
X-Decoder
Address
Generator
SI/SIO0
SO/SIO1
SIO2 *
SIO3 *
WP# *
HOLD# *
RESET# *
CS#
SCLK
Memory Array
Y-Decoder
Data
Register
Sense
Amplifier
SRAM
Buffer
Mode
Logic
State
Machine
HV
Generator
Clock Generator
Output
Buffer
* Depends on part number options.
P/N: PM1728
Macronix Proprietary
8
Rev. 1.9, March 13, 2019
MX25U12835F
6. DATA PROTECTION
During power transition, there may be some false system level signals which result in inadvertent erasure or programming. The device is designed to protect itself from these accidental write cycles.
The state machine will be reset as standby mode automatically during power up. In addition, the control register
architecture of the device constrains that the memory contents can only be changed after specific command sequences have completed successfully.
In the following, there are several features to protect the system from the accidental write cycles during VCC powerup and power-down or from system noise.
• Valid command length checking: The command length will be checked whether it is at byte base and completed
on byte boundary.
• Write Enable (WREN) command: WREN command is required to set the Write Enable Latch bit (WEL) before
other command to change data.
• Deep Power Down Mode: By entering deep power down mode, the flash device is under protected from writing
all commands except Release from deep power down mode command (RDP) and Read Electronic Signature
command (RES) and softreset command.
• Advanced Security Features: there are some protection and security features which protect content from inadvertent write and hostile access.
I. Block lock protection
- The Software Protected Mode (SPM) use (BP3, BP2, BP1, BP0) bits to allow part of memory to be protected
as read only. The protected area definition is shown as "Table 2. Protected Area Sizes", the protected areas are
more flexible which may protect various area by setting value of BP0-BP3 bits.
- The Hardware Protected Mode (HPM) use WP#/SIO2 to protect the (BP3, BP2, BP1, BP0) bits and Status
Register Write Protect bit.
- In four I/O and QPI mode, the feature of HPM will be disabled.
P/N: PM1728
Macronix Proprietary
9
Rev. 1.9, March 13, 2019
MX25U12835F
Table 2. Protected Area Sizes
Protected Area Sizes (T/B bit = 0)
Status bit
BP3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
BP2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
BP1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Protect Level
BP0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
128Mb
0 (none)
1 (1 block, protected block 255th)
2 (2 blocks, protected block 254th-255th)
3 (4 blocks, protected block 252nd-255th)
4 (8 blocks, protected block 248th-255th)
5 (16 blocks, protected block 240th-255th)
6 (32 blocks, protected block 224th-255th)
7 (64 blocks, protected block 192nd-255th)
8 (128 blocks, protected block 128th-255th)
9 (256 blocks, protected all)
10 (256 blocks, protected all)
11 (256 blocks, protected all)
12 (256 blocks, protected all)
13 (256 blocks, protected all)
14 (256 blocks, protected all)
15 (256 blocks, protected all)
Protected Area Sizes (T/B bit = 1)
Status bit
BP3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
P/N: PM1728
BP2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
BP1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Protect Level
BP0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
128Mb
0 (none)
1 (1 block, protected block 0th)
2 (2 blocks, protected block 0th-1st)
3 (4 blocks, protected block 0th-3rd)
4 (8 blocks, protected block 0th-7th)
5 (16 blocks, protected block 0th-15th)
6 (32 blocks, protected block 0th-31st)
7 (64 blocks, protected block 0th-63rd)
8 (128 blocks, protected block 0th-127th)
9 (256 blocks, protected all)
10 (256 blocks, protected all)
11 (256 blocks, protected all)
12 (256 blocks, protected all)
13 (256 blocks, protected all)
14 (256 blocks, protected all)
15 (256 blocks, protected all)
Macronix Proprietary
10
Rev. 1.9, March 13, 2019
MX25U12835F
II. Additional 4K-bit secured OTP for unique identifier: to provide 4K-bit one-time program area for setting device unique serial number - Which may be set by factory or system customer.
- Security register bit 0 indicates whether the secured OTP area is locked by factory or not.
- To program the 4K-bit secured OTP by entering 4K-bit secured OTP mode (with Enter Security OTP command),
and going through normal program procedure, and then exiting 4K-bit secured OTP mode by writing Exit Security
OTP command.
- Customer may lock-down the customer lockable secured OTP by writing WRSCUR(write security register) command to set customer lock-down bit1 as "1". Please refer to "Table 9. Security Register Definition" for security register bit definition and "Table 3. 4K-bit Secured OTP Definition" for address range definition.
- Note: Once lock-down whatever by factory or customer, it cannot be changed any more. While in 4K-bit secured
OTP mode, array access is not allowed.
Table 3. 4K-bit Secured OTP Definition
Address range
Size
Standard Factory Lock
xxx000 - xxx00F
128-bit
ESN (electrical serial number)
xxx010 - xxx1FF
3968-bit
N/A
P/N: PM1728
Macronix Proprietary
11
Customer Lock
Determined by customer
Rev. 1.9, March 13, 2019
MX25U12835F
7. Memory Organization
Table 4. Memory Organization
Block(64K-byte) Block(32K-byte)
Sector
254
508
individual block
lock/unlock unit:64K-byte
507
253
506
FF7FFFh
individual 16 sectors
lock/unlock unit:4K-byte
…
FF8FFFh
FF7000h
4080
FF0000h
FF0FFFh
4079
FEF000h
FEFFFFh
…
509
FF8000h
4087
4072
FE8000h
FE8FFFh
4071
FE7000h
FE7FFFh
…
510
4088
4064
FE0000h
FE0FFFh
4063
FDF000h
FDFFFFh
4056
FD8000h
FD8FFFh
4055
FD7000h
FD7FFFh
4048
FD0000h
FD0FFFh
47
02F000h
02FFFFh
40
028000h
028FFFh
39
027000h
027FFFh
…
255
FFFFFFh
…
511
Address Range
FFF000h
…
4095
5
…
individual block
lock/unlock unit:64K-byte
individual block
lock/unlock unit:64K-byte
3
01FFFFh
24
018000h
018FFFh
23
017000h
017FFFh
16
010000h
010FFFh
15
00F000h
00FFFFh
8
008000h
008FFFh
7
007000h
007FFFh
000000h
000FFFh
0
P/N: PM1728
individual 16 sectors
lock/unlock unit:4K-byte
…
0
0
020FFFh
01F000h
…
1
020000h
31
…
1
2
32
…
4
…
2
Macronix Proprietary
12
Rev. 1.9, March 13, 2019
MX25U12835F
8. DEVICE OPERATION
1. Before a command is issued, status register should be checked to ensure device is ready for the intended operation.
2. When incorrect command is inputted to this device, this device becomes standby mode and keeps the standby
mode until next CS# falling edge. In standby mode, SO pin of this device should be High-Z.
3. When correct command is inputted to this device, this device becomes active mode and keeps the active mode
until next CS# rising edge.
4. Input data is latched on the rising edge of Serial Clock (SCLK) and data shifts out on the falling edge of SCLK.
The difference of Serial mode 0 and mode 3 is shown as "Figure 1. Serial Modes Supported".
5. For the following instructions: RDID, RDSR, RDSCUR, READ, FAST_READ, DREAD, 2READ, QREAD, 4READ,
W4READ, RDSFDP, RES, REMS, QPIID, RDBLOCK, the shifted-in instruction sequence is followed by a dataout sequence. After any bit of data being shifted out, the CS# can be high. For the following instructions: WREN,
WRDI, WRSR, SE, BE32K, BE, CE, PP, 4PP, DP, ENSO, EXSO, WRSCUR, WPSEL, SBLK, SBULK, GBULK,
SUSPEND, RESUME, NOP, RSTEN, RST, EQIO, RSTQIO the CS# must go high exactly at the byte boundary;
otherwise, the instruction will be rejected and not executed.
6. During the progress of Write Status Register, Program, Erase operation, to access the memory array is neglected and not affect the current operation of Write Status Register, Program, Erase.
Figure 1. Serial Modes Supported
CPOL
CPHA
shift in
(Serial mode 0)
0
0
SCLK
(Serial mode 3)
1
1
SCLK
SI
shift out
MSB
SO
MSB
Note:
CPOL indicates clock polarity of Serial master, CPOL=1 for SCLK high while idle, CPOL=0 for SCLK low while not
transmitting. CPHA indicates clock phase. The combination of CPOL bit and CPHA bit decides which Serial mode is
supported.
P/N: PM1728
Macronix Proprietary
13
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 2. Serial Input Timing
tSHSL
CS#
tCHSL
tSLCH
tCHSH
tSHCH
SCLK
tDVCH
tCHCL
tCHDX
tCLCH
LSB
MSB
SI
High-Z
SO
Figure 3. Output Timing
CS#
tCH
SCLK
tCLQV
tCLQX
tCL
tCLQV
tCLQX
LSB
SO
SI
P/N: PM1728
tSHQZ
ADDR.LSB IN
Macronix Proprietary
14
Rev. 1.9, March 13, 2019
MX25U12835F
8-1. Quad Peripheral Interface (QPI) Read Mode
QPI protocol enables user to take full advantage of Quad I/O Serial NOR Flash by providing the Quad I/O interface
in command cycles, address cycles and as well as data output cycles.
Enable QPI mode
By issuing EQIO command (35h), the QPI mode is enabled.
Figure 4. Enable QPI Sequence (Command 35h)
CS#
MODE 3
SCLK
0
1
2
3
4
5
6
7
MODE 0
SIO0
35
SIO[3:1]
Reset QPI (RSTQIO)
To reset the QPI mode, the RSTQIO (F5h) command is required. After the RSTQIO command is issued, the device
returns from QPI mode (4 I/O interface in command cycles) to SPI mode (1 I/O interface in command cycles).
Note:
For EQIO and RSTQIO commands, CS# high width has to follow "write spec" tSHSL (as defined in "Table 19. AC
Characteristics") for next instruction.
Figure 5. Reset QPI Mode (Command F5h)
CS#
SCLK
SIO[3:0]
P/N: PM1728
F5
Macronix Proprietary
15
Rev. 1.9, March 13, 2019
MX25U12835F
9. COMMAND DESCRIPTION
Table 5. Command Set
Read/Write Array Commands
Mode
SPI
SPI/QPI
Command (byte)
READ
(normal read)
FAST READ
(fast read data)
1st byte
03 (hex)
0B (hex)
nd
2 byte
SPI
2READ
(2 x I/O read
command)
BB (hex)
SPI/QPI
SPI/QPI
4READ
(4 x I/O read)
4READ
(4 x I/O read)
EB (hex)
EB (hex)
ADD1(8)
ADD1(8)
ADD1(4)
ADD1(2)
ADD1(2)
3rd byte
ADD2(8)
ADD2(8)
ADD2(8)
ADD2(4)
ADD2(2)
ADD2(2)
4th byte
ADD3(8)
ADD3(8)
ADD3(8)
ADD3(4)
ADD3(2)
ADD3(2)
Dummy(6)
Dummy(Note 2)
Quad I/O read
with 6 dummy
cycles
Quad I/O read
with configurable
dummy cycles
SPI/QPI
SPI/QPI
5th byte
Action
Mode
ADD1(8)
(Note 4)
SPI
DREAD
(1I / 2O read
command)
3B (hex)
Dummy(8)/(4)
Dummy(8)
Dummy(4)(Note 3)
(Note 1)
n bytes read out n bytes read out n bytes read out n bytes read out
until CS# goes
until CS# goes
by Dual Output
by 2 x I/O until
high
high
until CS# goes
CS# goes high
high
SPI
SPI
SPI/QPI
SPI
1st byte
E7 (hex)
6B (hex)
02 (hex)
4PP
(quad page
program)
38 (hex)
20 (hex)
BE 32K
(block erase
32KB)
52 (hex)
2nd byte
ADD1(2)
ADD1(8)
ADD1
ADD1
ADD1
ADD1
ADD2(2)
ADD2(8)
ADD2
ADD2
ADD2
ADD2
ADD3
ADD3
ADD3
ADD3
to program the
selected page
quad input to
program the
selected page
to erase the
selected sector
to erase the
selected 32K
block
Command (byte)
rd
3 byte
th
W4READ
QREAD
(1I/4O read)
PP
(page program)
4 byte
ADD3(2)
ADD3(8)
5th byte
Dummy(4)
Dummy(8)
Action
Mode
Quad I/O read n bytes read out
for with 4 dummy by Quad output
cycles
until CS# goes
high
SPI/QPI
1st byte
BE
(block erase
64KB)
D8 (hex)
2nd byte
ADD1
Command (byte)
3rd byte
ADD2
4th byte
ADD3
SE
(sector erase)
SPI/QPI
CE
(chip erase)
60 or C7 (hex)
5th byte
Action
to erase the
selected block
to erase whole
chip
Note 1: The fast read command (0Bh) when under QPI mode, the dummy cycle is 4 clocks.
Note 2: Dummy cycle number will be different, depending on the bit7 (DC) setting of Configuration Register. Please refer to
"Configuration Register" Table. Only MX25U12835FZNI-08G supports 4READ with 8 dummy cycles.
Note 3: The count base is 4-bit for ADD(2) and Dummy(2) because of 2 x I/O. And the MSB is on SO/SIO1, which is different
from 1 x I/O condition.
Note 4: The number in parentheses after "ADD" or "Data" stands for how many clock cycles it has. For example, "Data(8)"
represents there are 8 clock cycles for the data in.
P/N: PM1728
Macronix Proprietary
16
Rev. 1.9, March 13, 2019
MX25U12835F
Register/Setting Commands
Mode
SPI/QPI
SPI/QPI
SPI/QPI
RDCR
(read
configuration
register)
SPI/QPI
1st byte
06 (hex)
04 (hex)
05 (hex)
15 (hex)
Command
(byte)
WREN
WRDI
(write enable) (write disable)
RDSR
(read status
register)
WRSR
(write status/
configuration
register)
SPI/QPI
01 (hex)
2nd byte
Values
3rd byte
Values
WPSEL
(Write Protect
Selection)
EQIO
(Enable QPI)
SPI/QPI
SPI
68 (hex)
35 (hex)
4th byte
5th byte
Action
sets the (WEL)
resets the
to read out the to read out the
write enable
(WEL) write
values of the values of the
latch bit
enable latch bit status register configuration
register
Command
(byte)
RSTQIO
(Reset QPI)
Mode
1st byte
QPI
F5 (hex)
PGM/ERS
Suspend
(Suspends
Program/
Erase)
SPI/QPI
B0 (hex)
PGM/ERS
Resume
(Resumes
Program/
Erase)
SPI/QPI
30 (hex)
to write new
to enter and
values of the enable individal
status/
block protect
configuration
mode
register
DP (Deep
power down)
RDP (Release
from deep
power down)
SBL
(Set Burst
Length)
SPI/QPI
B9 (hex)
SPI/QPI
AB (hex)
SPI/QPI
C0 (hex)
2nd byte
Entering the
QPI mode
Value
rd
3 byte
4th byte
5th byte
Action
P/N: PM1728
Exiting the QPI
mode
enters deep
power down
mode
Macronix Proprietary
17
release from
deep power
down mode
to set Burst
length
Rev. 1.9, March 13, 2019
MX25U12835F
ID/Security Commands
Command
(byte)
Mode
1st byte
RDID
RES (read
(read identificelectronic ID)
ation)
SPI
9F (hex)
SPI/QPI
AB (hex)
REMS (read
electronic
QPIID
manufacturer (QPI ID Read)
& device ID)
SPI
QPI
90 (hex)
AF (hex)
RDSFDP
SPI/QPI
5A (hex)
2nd byte
x
x
ADD1(8)
3rd byte
x
x
ADD2(8)
4th byte
x
ADD(Note 5)
5 byte
COMMAND
(byte)
Mode
1st byte
outputs JEDEC to read out
output the
ID: 1-byte
1-byte Device Manufacturer
Manufacturer
ID
ID & Device ID
ID & 2-byte
Device ID
RDSCUR
WRSCUR
(read security (write security
register)
register)
SPI/QPI
SPI/QPI
2B (hex)
2F (hex)
SPI/QPI
B1 (hex)
SPI/QPI
C1 (hex)
ADD3(8)
th
Action
ENSO (enter EXSO (exit
secured OTP) secured OTP)
SBLK
(single block
lock
SPI/QPI
36 (hex)
ID in QPI
interface
SBULK
(single block
unlock)
SPI/QPI
39 (hex)
Dummy(8)
n bytes read
to enter the to exit the 4Kout until CS# 4K-bit secured bit secured
goes high
OTP mode
OTP mode
RDBLOCK
(block protect
read)
SPI/QPI
3C (hex)
2nd byte
ADD1
ADD1
ADD1
3rd byte
ADD2
ADD2
ADD2
4th byte
ADD3
ADD3
ADD3
GBLK
(gang block
lock)
SPI/QPI
7E (hex)
GBULK
(gang block
unlock)
SPI/QPI
98 (hex)
whole chip
write protect
whole chip
unprotect
5th byte
Action
to read value to set the lockindividual
individual block read individual
of security
down bit as
block (64K(64K-byte) or block or sector
register
"1" (once lock- byte) or sector sector (4Kwrite protect
down, cannot (4K-byte) write byte) unprotect
status
be update)
protect
Note 5: ADD=00H will output the manufacturer ID first and ADD=01H will output device ID first.
P/N: PM1728
Macronix Proprietary
18
Rev. 1.9, March 13, 2019
MX25U12835F
Reset Commands
Mode
SPI/QPI
SPI/QPI
RST
(Reset
Memory)
SPI/QPI
1st byte
00 (hex)
66 (hex)
99 (hex)
COMMAND
(byte)
NOP
RSTEN
(No Operation) (Reset Enable)
nd
2 byte
3rd byte
4th byte
5th byte
Action
(Note 6)
Note 5: It is not recommended to adopt any other code not in the command definition table, which will potentially enter
the hidden mode.
Note 6: The RSTEN command must be executed before executing the RST command. If any other command is issued
in-between RSTEN and RST, the RST command will be ignored.
P/N: PM1728
Macronix Proprietary
19
Rev. 1.9, March 13, 2019
MX25U12835F
9-1. Write Enable (WREN)
The Write Enable (WREN) instruction is for setting Write Enable Latch (WEL) bit. For those instructions like PP, 4PP,
SE, BE32K, BE, CE, and WRSR, which are intended to change the device content WEL bit should be set every time
after the WREN instruction setting the WEL bit.
The sequence of issuing WREN instruction is: CS# goes low→sending WREN instruction code→ CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
Figure 6. Write Enable (WREN) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
SCLK
Mode 0
Command
SI
06h
High-Z
SO
Figure 7. Write Enable (WREN) Sequence (QPI Mode)
CS#
0
Mode 3
1
SCLK
Mode 0
Command
06h
SIO[3:0]
P/N: PM1728
Macronix Proprietary
20
Rev. 1.9, March 13, 2019
MX25U12835F
9-2. Write Disable (WRDI)
The Write Disable (WRDI) instruction is to reset Write Enable Latch (WEL) bit.
The sequence of issuing WRDI instruction is: CS# goes low→sending WRDI instruction code→CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The WEL bit is reset by following situations:
- Power-up
- Reset# pin driven low
- WRDI command completion
- WRSR command completion
- PP command completion
- 4PP command completion
- SE command completion
- BE32K command completion
- BE command completion
- CE command completion
- PGM/ERS Suspend command completion
- Softreset command completion
- WRSCUR command completion
- WPSEL command completion
- GBLK command completion
- GBULK command completion
Figure 8. Write Disable (WRDI) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
SCLK
Mode 0
Command
SI
04h
High-Z
SO
Figure 9. Write Disable (WRDI) Sequence (QPI Mode)
CS#
0
Mode 3
1
SCLK
Mode 0
Command
04h
SIO[3:0]
P/N: PM1728
Macronix Proprietary
21
Rev. 1.9, March 13, 2019
MX25U12835F
9-3. Read Identification (RDID)
The RDID instruction is for reading the manufacturer ID of 1-byte and followed by Device ID of 2-byte. The Macronix Manufacturer ID and Device ID are listed as "Table 6. ID Definitions".
The sequence of issuing RDID instruction is: CS# goes low→ sending RDID instruction code→24-bits ID data out
on SO→ to end RDID operation can drive CS# to high at any time during data out.
While Program/Erase operation is in progress, it will not decode the RDID instruction, therefore there's no effect on
the cycle of program/erase operation which is currently in progress. When CS# goes high, the device is at standby
stage.
Figure 10. Read Identification (RDID) Sequence (SPI mode only)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
28 29 30 31
SCLK
Mode 0
Command
SI
9Fh
Manufacturer Identification
SO
High-Z
7
6
5
3
2
1
MSB
P/N: PM1728
Device Identification
0 15 14 13
3
2
1
0
MSB
Macronix Proprietary
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Rev. 1.9, March 13, 2019
MX25U12835F
9-4. Release from Deep Power-down (RDP), Read Electronic Signature (RES)
The Release from Deep Power-down (RDP) instruction is terminated by driving Chip Select (CS#) High. When Chip
Select (CS#) is driven High, the device is put in the Stand-by Power mode. If the device was not previously in the
Deep Power-down mode, the transition to the Stand-by Power mode is immediate. If the device was previously in
the Deep Power-down mode, the transition to the Stand-by Power mode is delayed by tRES1, and Chip Select (CS#)
must remain High for at least tRES1(max), as specified in "Table 19. AC Characteristics". AC Characteristics. Once in
the Stand-by Power mode, the device waits to be selected, so that it can receive, decode and execute instructions.
The RDP instruction is only for releasing from Deep Power Down Mode. Reset# pin goes low will release the Flash
from deep power down mode.
RES instruction is for reading out the old style of 8-bit Electronic Signature, whose values are shown as "Table 6. ID
Definitions". This is not the same as RDID instruction. It is not recommended to use for new design. For new design,
please use RDID instruction.
Even in Deep power-down mode, the RDP and RES are also allowed to be executed, only except the device is in
progress of program/erase/write cycle; there's no effect on the current program/erase/write cycle in progress.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The RES instruction is ended by CS# goes high after the ID been read out at least once. The ID outputs repeatedly if continuously send the additional clock cycles on SCLK while CS# is at low. If the device was not previously
in Deep Power-down mode, the device transition to standby mode is immediate. If the device was previously in
Deep Power-down mode, there's a delay of tRES2 to transit to standby mode, and CS# must remain to high at least
tRES2(max). Once in the standby mode, the device waits to be selected, so it can be receive, decode, and execute
instruction.
Figure 11. Read Electronic Signature (RES) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10
28 29 30 31 32 33 34 35 36 37 38
SCLK
Mode 0
Command
SI
ABh
tRES2
3 Dummy Bytes
23 22 21
3
2
1
0
MSB
SO
Electronic Signature Out
High-Z
7
6
5
4
3
2
1
0
MSB
Deep Power-down Mode
P/N: PM1728
Macronix Proprietary
23
Stand-by Mode
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 12. Read Electronic Signature (RES) Sequence (QPI Mode)
CS#
MODE 3
0
1
2
3
4
5
6
7
SCLK
MODE 0
3 Dummy Bytes
Command
SIO[3:0]
X
ABh
X
X
X
X
X
H0
L0
MSB LSB
Data In
Data Out
Stand-by Mode
Deep Power-down Mode
Figure 13. Release from Deep Power-down (RDP) Sequence (SPI Mode)
CS#
0
Mode 3
1
2
3
4
5
6
tRES1
7
SCLK
Mode 0
Command
SI
ABh
High-Z
SO
Deep Power-down Mode
Stand-by Mode
Figure 14. Release from Deep Power-down (RDP) Sequence (QPI Mode)
CS#
Mode 3
tRES1
0
1
SCLK
Mode 0
Command
SIO[3:0]
ABh
Deep Power-down Mode
P/N: PM1728
Macronix Proprietary
24
Stand-by Mode
Rev. 1.9, March 13, 2019
MX25U12835F
9-5. Read Electronic Manufacturer ID & Device ID (REMS)
The REMS instruction returns both the JEDEC assigned manufacturer ID and the device ID. The Device ID values
are listed in "Table 6. ID Definitions".
The REMS instruction is initiated by driving the CS# pin low and sending the instruction code "90h" followed by two
dummy bytes and one address byte (A7-A0). After which the manufacturer ID for Macronix (C2h) and the device ID
are shifted out on the falling edge of SCLK with the most significant bit (MSB) first. If the address byte is 00h, the
manufacturer ID will be output first, followed by the device ID. If the address byte is 01h, then the device ID will be
output first, followed by the manufacturer ID. While CS# is low, the manufacturer and device IDs can be read continuously, alternating from one to the other. The instruction is completed by driving CS# high.
Figure 15. Read Electronic Manufacturer & Device ID (REMS) Sequence (SPI Mode only)
CS#
SCLK
Mode 3
0
1
2
Mode 0
3
4
5
6
7
8
Command
SI
9 10
2 Dummy Bytes
15 14 13
90h
3
2
1
0
High-Z
SO
CS#
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
SCLK
ADD (1)
SI
7
6
5
4
3
2
1
0
Manufacturer ID
SO
7
6
5
4
3
2
1
Device ID
0
7
6
5
4
3
2
MSB
MSB
1
0
7
MSB
Notes:
(1) ADD=00H will output the manufacturer's ID first and ADD=01H will output device ID first.
(2) Instruction is 90h (hex).
P/N: PM1728
Macronix Proprietary
25
Rev. 1.9, March 13, 2019
MX25U12835F
9-6. QPI ID Read (QPIID)
User can execute this ID Read instruction to identify the Device ID and Manufacturer ID. The sequence of issue
QPIID instruction is CS# goes low→sending QPI ID instruction→Data out on SO→CS# goes high. Most significant
bit (MSB) first.
After the command cycle, the device will immediately output data on the falling edge of SCLK. The manufacturer ID,
memory type, and device ID data byte will be output continuously, until the CS# goes high.
Table 6. ID Definitions
Command Type
Command
RDID / QPIID
9Fh / AFh
RES
ABh
REMS
90h
P/N: PM1728
MX25U12835F
Manufacturer ID
C2
Memory Type
25
Electronic ID
38
Device ID
38
Manufacturer ID
C2
Macronix Proprietary
26
Memory Density
38
Rev. 1.9, March 13, 2019
MX25U12835F
9-7. Read Status Register (RDSR)
The RDSR instruction is for reading Status Register Bits. The Read Status Register can be read at any time (even
in program/erase/write status register condition). It is recommended to check the Write in Progress (WIP) bit before
sending a new instruction when a program, erase, or write status register operation is in progress.
The sequence of issuing RDSR instruction is: CS# goes low→ sending RDSR instruction code→ Status Register data
out on SO.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care" in
SPI mode.
Figure 16. Read Status Register (RDSR) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
SCLK
Mode 0
command
05h
SI
SO
Status Register Out
High-Z
7
6
5
4
3
2
Status Register Out
1
0
7
6
5
4
3
2
1
0
7
MSB
MSB
Figure 17. Read Status Register (RDSR) Sequence (QPI Mode)
CS#
Mode 3 0
1
2
3
4
5
6
7
8
N
SCLK
Mode 0
SIO[3:0]
05h H0 L0 H0 L0 H0 L0
H0 L0
MSB LSB
Status Byte Status Byte Status Byte
P/N: PM1728
Macronix Proprietary
27
Status Byte
Rev. 1.9, March 13, 2019
MX25U12835F
9-8. Read Configuration Register (RDCR)
The RDCR instruction is for reading Configuration Register Bits. The Read Configuration Register can be read at
any time (even in program/erase/write configuration register condition). It is recommended to check the Write in
Progress (WIP) bit before sending a new instruction when a program, erase, or write configuration register operation
is in progress.
The sequence of issuing RDCR instruction is: CS# goes low→ sending RDCR instruction code→ Configuration Register data out on SO.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care" in
SPI mode.
Figure 18. Read Configuration Register (RDCR) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
SCLK
Mode 0
command
15h
SI
SO
Configuration register Out
High-Z
7
6
5
4
3
2
1
0
Configuration register Out
7
6
5
4
3
2
1
0
7
MSB
MSB
Figure 19. Read Configuration Register (RDCR) Sequence (QPI Mode)
CS#
Mode 3 0
1
2
3
4
5
6
7
8
N
SCLK
Mode 0
SIO[3:0]
15h H0 L0 H0 L0 H0 L0
H0 L0
MSB LSB
Config. Byte Config. Byte Config. Byte
P/N: PM1728
Macronix Proprietary
28
Config. Byte
Rev. 1.9, March 13, 2019
MX25U12835F
For user to check if Program/Erase operation is finished or not, RDSR instruction flow are shown as follows:
Figure 20. Program/Erase flow with read array data
start
WREN command
RDSR command*
WEL=1?
No
Yes
Program/erase command
Write program data/address
(Write erase address)
RDSR command
WIP=0?
No
Yes
RDSR command
Read WEL=0, BP[3:0], QE,
and SRWD data
Read array data
(same address of PGM/ERS)
Verify OK?
No
Yes
Program/erase successfully
Program/erase
another block?
No
Program/erase fail
Yes
* Issue RDSR to check BP[3:0].
* If WPSEL = 1, issue RDBLOCK to check the block status.
Program/erase completed
P/N: PM1728
Macronix Proprietary
29
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 21. Program/Erase flow without read array data (read P_FAIL/E_FAIL flag)
start
WREN command
RDSR command*
WEL=1?
No
Yes
Program/erase command
Write program data/address
(Write erase address)
RDSR command
WIP=0?
No
Yes
RDSR command
Read WEL=0, BP[3:0], QE,
and SRWD data
RDSCUR command
Yes
P_FAIL/E_FAIL =1 ?
No
Program/erase fail
Program/erase successfully
Program/erase
another block?
No
Yes
* Issue RDSR to check BP[3:0].
* If WPSEL = 1, issue RDBLOCK to check the block status.
Program/erase completed
P/N: PM1728
Macronix Proprietary
30
Rev. 1.9, March 13, 2019
MX25U12835F
Status Register
The definition of the status register bits is as below:
WIP bit. The Write in Progress (WIP) bit, a volatile bit, indicates whether the device is busy in program/erase/write status register progress. When WIP bit sets to 1, which means the device is busy in program/erase/write status register
progress. When WIP bit sets to 0, which means the device is not in progress of program/erase/write status register
cycle.
WEL bit. The Write Enable Latch (WEL) bit is a volatile bit that is set to “1” by the WREN instruction. WEL needs to be
set to “1” before the device can accept program and erase instructions, otherwise the program and erase instructions
are ignored. WEL automatically clears to “0” when a program or erase operation completes. To ensure that both WIP
and WEL are “0” and the device is ready for the next program or erase operation, it is recommended that WIP be confirmed to be “0” before checking that WEL is also “0” (Please refer to "Figure 24. WRSR flow"). If a program or erase
instruction is applied to a protected memory area, the instruction will be ignored and WEL will clear to “0”.
BP3, BP2, BP1, BP0 bits. The Block Protect (BP3, BP2, BP1, BP0) bits, non-volatile bits, indicate the protected area
(as defined in "Table 2. Protected Area Sizes") of the device to against the program/erase instruction without hardware
protection mode being set. To write the Block Protect (BP3, BP2, BP1, BP0) bits requires the Write Status Register (WRSR)
instruction to be executed. Those bits define the protected area of the memory to against Page Program (PP), Sector
Erase (SE), Block Erase 32KB (BE32K), Block Erase (BE) and Chip Erase (CE) instructions (only if Block Protect bits
(BP3:BP0) set to 0, the CE instruction can be executed). The BP3, BP2, BP1, BP0 bits are "0" as default, which is unprotected.
QE bit. The Quad Enable (QE) bit, non-volatile bit, while it is "0" (factory default), it performs non-Quad and WP#,
RESET# are enable. While QE is "1", it performs Quad I/O mode and WP#, RESET# are disabled. In the other
word, if the system goes into four I/O mode (QE=1), the feature of HPM and RESET will be disabled.
SRWD bit. The Status Register Write Disable (SRWD) bit, non-volatile bit, is operated together with Write Protection
(WP#/SIO2) pin for providing hardware protection mode. The hardware protection mode requires SRWD sets to 1 and
WP#/SIO2 pin signal is low stage. In the hardware protection mode, the Write Status Register (WRSR) instruction is
no longer accepted for execution and the SRWD bit and Block Protect bits (BP3, BP2, BP1, BP0) are read only. The
SRWD bit defaults to be "0".
Table 7. Status Register
bit7
bit6
SRWD (status
register write
protect)
QE
(Quad
Enable)
1=status
register write
1=Quad
disabled
Enable
0=status
0=not Quad
register write
Enable
enabled
Non-volatile
bit
Non-volatile
bit
bit5
BP3
(level of
protected
block)
bit4
BP2
(level of
protected
block)
bit3
BP1
(level of
protected
block)
bit2
BP0
(level of
protected
block)
(note 1)
(note 1)
(note 1)
(note 1)
Non-volatile
bit
Non-volatile
bit
Non-volatile
bit
Non-volatile
bit
bit1
bit0
WEL
WIP
(write enable
(write in
latch)
progress bit)
1=write
1=write
enable
operation
0=not write 0=not in write
enable
operation
volatile bit
volatile bit
Note 1: Please refer to the "Table 2. Protected Area Sizes".
P/N: PM1728
Macronix Proprietary
31
Rev. 1.9, March 13, 2019
MX25U12835F
Configuration Register
The Configuration Register is able to change the default status of Flash memory. Flash memory will be configured
after the CR bit is set.
ODS bit
The output driver strength (ODS2, ODS1, ODS0) bits are volatile bits, which indicate the output driver level (as
defined in Output Driver Strength Table) of the device. The Output Driver Strength is defaulted as 30 Ohms when
delivered from factory. To write the ODS bits requires the Write Status Register (WRSR) instruction to be executed.
TB bit
The Top/Bottom (TB) bit is a non-volatile OTP bit. The Top/Bottom (TB) bit is used to configure the Block Protect
area by BP bit (BP3, BP2, BP1, BP0), starting from TOP or Bottom of the memory array. The TB bit is defaulted as
“0”, which means Top area protect. When it is set as “1”, the protect area will change to Bottom area of the memory
device. To write the TB bits requires the Write Status Register (WRSR) instruction to be executed.
Configuration Register
bit7
bit6
DC
(Dummy
Reserved
Cycle)
(note 2)
bit5
bit4
Reserved
Reserved
x
x
x
bit3
bit2
bit1
bit0
TB
ODS 2
ODS 1
ODS 0
(top/bottom (output driver (output driver (output driver
selected)
strength)
strength)
strength)
0=Top area
protect
(note 1)
(note 1)
(note 1)
1=Bottom
area protect
(Default=0)
OTP
volatile bit
volatile bit
volatile bit
Volatile bit
x
x
x
Note 1: Please refer to "Output Driver Strength Table"
Note 2: For 4READ command on MX25U12835FZNI-08G (f=133MHz) only. Please refer to "Dummy Cycle and Frequency Table" for details.
Output Driver Strength Table
ODS2
0
0
0
0
1
1
1
1
ODS1
0
0
1
1
0
0
1
1
ODS0
0
1
0
1
0
1
0
1
Description
Reserved
90 Ohms
60 Ohms
45 Ohms
Reserved
20 Ohms
15 Ohms
30 Ohms (Default)
Note
Impedance at VCC/2
Dummy Cycle and Frequency Table
DC
Numbers of Dummy
clock cycles
Quad I/O Read
1
8
133
0 (default)
6
104
Note: For 4READ command on MX25U12835FZNI-08G (f=133MHz) only.
P/N: PM1728
Macronix Proprietary
32
Rev. 1.9, March 13, 2019
MX25U12835F
9-9. Write Status Register (WRSR)
The WRSR instruction is for changing the values of Status Register Bits and Configuration Register Bits. Before
sending WRSR instruction, the Write Enable (WREN) instruction must be decoded and executed to set the Write
Enable Latch (WEL) bit in advance. The WRSR instruction can change the value of Block Protect (BP3, BP2, BP1,
BP0) bits to define the protected area of memory (as shown in "Table 2. Protected Area Sizes"). The WRSR also can
set or reset the Quad enable (QE) bit and set or reset the Status Register Write Disable (SRWD) bit in accordance
with Write Protection (WP#/SIO2) pin signal, but has no effect on bit1(WEL) and bit0 (WIP) of the status register.
The WRSR instruction cannot be executed once the Hardware Protected Mode (HPM) is entered.
The sequence of issuing WRSR instruction is: CS# goes low→ sending WRSR instruction code→ Status Register
data on SI→CS# goes high.
The CS# must go high exactly at the 8 bites or 16 bits data boundary; otherwise, the instruction will be rejected and
not executed. The self-timed Write Status Register cycle time (tW) is initiated as soon as Chip Select (CS#) goes
high. The Write in Progress (WIP) bit still can be checked during the Write Status Register cycle is in progress. The
WIP sets 1 during the tW timing, and sets 0 when Write Status Register Cycle is completed, and the Write Enable
Latch (WEL) bit is reset.
Figure 22. Write Status Register (WRSR) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
SCLK
Mode 0
SI
SO
command
01h
Status
Register In
7
6
4
5
2
3
Configuration
Register In
0 15 14 13 12 11 10 9
1
8
MSB
High-Z
Note: The CS# must go high exactly at 8 bits or 16 bits data boundary to completed the write register command.
Figure 23. Write Status Register (WRSR) Sequence (QPI Mode)
CS#
Mode 3
0
1
2
3
4
5
Mode 3
SCLK
Mode 0
Mode 0
Command
SIO[3:0]
P/N: PM1728
SR in
H0
01h
L0
CR in
H1
Macronix Proprietary
33
L1
Rev. 1.9, March 13, 2019
MX25U12835F
Software Protected Mode (SPM):
- When SRWD bit=0, no matter WP#/SIO2 is low or high, the WREN instruction may set the WEL bit and can
change the values of SRWD, BP3, BP2, BP1, BP0. The protected area, which is defined by BP3, BP2, BP1,
BP0, is at software protected mode (SPM).
- When SRWD bit=1 and WP#/SIO2 is high, the WREN instruction may set the WEL bit can change the values of
SRWD, BP3, BP2, BP1, BP0. The protected area, which is defined by BP3, BP2, BP1, BP0, is at software protected mode (SPM)
Note:
If SRWD bit=1 but WP#/SIO2 is low, it is impossible to write the Status Register even if the WEL bit has previously
been set. It is rejected to write the Status Register and not be executed.
Hardware Protected Mode (HPM):
- When SRWD bit=1, and then WP#/SIO2 is low (or WP#/SIO2 is low before SRWD bit=1), it enters the hardware
protected mode (HPM). The data of the protected area is protected by software protected mode by BP3, BP2,
BP1, BP0 and hardware protected mode by the WP#/SIO2 to against data modification.
Note:
To exit the hardware protected mode requires WP#/SIO2 driving high once the hardware protected mode is entered.
If the WP#/SIO2 pin is permanently connected to high, the hardware protected mode can never be entered; only
can use software protected mode via BP3, BP2, BP1, BP0.
If the system enter QPI or set QE=1, the feature of HPM will be disabled.
Table 8. Protection Modes
Mode
Software protection
mode (SPM)
Hardware protection
mode (HPM)
Status register condition
WP# and SRWD bit status
Memory
Status register can be written
in (WEL bit is set to "1") and
the SRWD, BP0-BP3
bits can be changed
WP#=1 and SRWD bit=0, or
WP#=0 and SRWD bit=0, or
WP#=1 and SRWD=1
The protected area
cannot
be program or erase.
The SRWD, BP0-BP3 of
status register bits cannot be
changed
WP#=0, SRWD bit=1
The protected area
cannot
be program or erase.
Note: As defined by the values in the Block Protect (BP3, BP2, BP1, BP0) bits of the Status Register, as shown in
"Table 2. Protected Area Sizes".
P/N: PM1728
Macronix Proprietary
34
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 24. WRSR flow
start
WREN command
RDSR command
No
WEL=1?
Yes
WRSR command
Write status register
and Configuration register
data
RDSR command
No
WIP=0?
Yes
RDSR command
Read WEL=0, BP[3:0], QE,
and SRWD data
No
Verify OK?
Yes
WRSR successfully
P/N: PM1728
WRSR fail
Macronix Proprietary
35
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 25. WP# Setup Timing and Hold Timing during WRSR when SRWD=1
WP#
tSHWL
tWHSL
CS#
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SCLK
01h
SI
SO
P/N: PM1728
High-Z
Macronix Proprietary
36
Rev. 1.9, March 13, 2019
MX25U12835F
9-10. Read Data Bytes (READ)
The read instruction is for reading data out. The address is latched on rising edge of SCLK, and data shifts out on
the falling edge of SCLK at a maximum frequency fR. The first address byte can be at any location. The address
is automatically increased to the next higher address after each byte data is shifted out, so the whole memory can
be read out at a single READ instruction. The address counter rolls over to 0 when the highest address has been
reached.
The sequence of issuing READ instruction is: CS# goes low→sending READ instruction code→ 3-byte address on
SI→ data out on SO→to end READ operation can use CS# to high at any time during data out.
Figure 26. Read Data Bytes (READ) Sequence (SPI Mode only)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
28 29 30 31 32 33 34 35 36 37 38 39
9 10
SCLK
Mode 0
SI
command
03h
24-Bit Address
23 22 21
3
2
1
0
MSB
SO
Data Out 1
High-Z
7
6
5
4
3
2
Data Out 2
1
0
7
MSB
P/N: PM1728
Macronix Proprietary
37
Rev. 1.9, March 13, 2019
MX25U12835F
9-11. Read Data Bytes at Higher Speed (FAST_READ)
The FAST_READ instruction is for quickly reading data out. The address is latched on rising edge of SCLK, and
data of each bit shifts out on the falling edge of SCLK at a maximum frequency fC. The first address byte can be at
any location. The address is automatically increased to the next higher address after each byte data is shifted out,
so the whole memory can be read out at a single FAST_READ instruction. The address counter rolls over to 0 when
the highest address has been reached.
Read on SPI Mode The sequence of issuing FAST_READ instruction is: CS# goes low→ sending FAST_READ
instruction code→ 3-byte address on SI→1-dummy byte (default) address on SI→ data out on SO→ to end FAST_
READ operation can use CS# to high at any time during data out.
Read on QPI Mode The sequence of issuing FAST_READ instruction in QPI mode is: CS# goes low→ sending
FAST_READ instruction, 2 cycles→ 24-bit address interleave on SIO3, SIO2, SIO1 & SIO0→4 dummy cycles→data
out interleave on SIO3, SIO2, SIO1 & SIO0→ to end QPI FAST_READ operation can use CS# to high at any time
during data out.
While Program/Erase/Write Status Register cycle is in progress, FAST_READ instruction is rejected without any impact on the Program/Erase/Write Status Register current cycle.
P/N: PM1728
Macronix Proprietary
38
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 27. Read at Higher Speed (FAST_READ) Sequence (SPI Mode)
CS#
SCLK
Mode 3
0
1
2
Mode 0
3
4
5
6
7
8
9 10
Command
SI
28 29 30 31
24-Bit Address
23 22 21
0Bh
3
2
1
0
High-Z
SO
CS#
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
SCLK
Dummy Cycle
7
SI
6
5
4
3
2
0
1
DATA OUT 2
DATA OUT 1
7
SO
6
5
4
3
2
1
0
7
6
5
4
3
2
1
MSB
MSB
0
7
MSB
Figure 28. Read at Higher Speed (FAST_READ) Sequence (QPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
A5
A4
A3
A2
A1
A0
8
9
10
11
12
13
14
15
H1
L1
SCLK
Mode 0
Command
SIO(3:0)
0Bh
Data In
P/N: PM1728
X
X
X
X
H0
L0
MSB LSB MSB LSB
24-Bit Address
Data Out 1 Data Out 2
Macronix Proprietary
39
Rev. 1.9, March 13, 2019
MX25U12835F
9-12. Dual Read Mode (DREAD)
The DREAD instruction enable double throughput of Serial NOR Flash in read mode. The address is latched on
rising edge of SCLK, and data of every two bits (interleave on 2 I/O pins) shift out on the falling edge of SCLK at a
maximum frequency fT. The first address byte can be at any location. The address is automatically increased to the
next higher address after each byte data is shifted out, so the whole memory can be read out at a single DREAD
instruction. The address counter rolls over to 0 when the highest address has been reached. Once writing DREAD
instruction, the following data out will perform as 2-bit instead of previous 1-bit.
The sequence of issuing DREAD instruction is: CS# goes low → sending DREAD instruction → 3-byte address on
SI → 8-bit dummy cycle → data out interleave on SIO1 & SIO0 → to end DREAD operation can use CS# to high
at any time during data out.
While Program/Erase/Write Status Register cycle is in progress, DREAD instruction is rejected without any impact
on the Program/Erase/Write Status Register current cycle.
Figure 29. Dual Read Mode Sequence (Command 3B)
CS#
0
1
2
3
4
5
6
7
8
SCLK
…
Command
SI/SIO0
SO/SIO1
P/N: PM1728
30 31 32
9
3B
…
24 ADD Cycle
A23 A22
…
39 40 41 42 43 44 45
A1 A0
High Impedance
8 dummy
cycle
Data Out
1
Data Out
2
D6 D4 D2 D0 D6 D4
D7 D5 D3 D1 D7 D5
Macronix Proprietary
40
Rev. 1.9, March 13, 2019
MX25U12835F
9-13. 2 x I/O Read Mode (2READ)
The 2READ instruction enable double throughput of Serial NOR Flash in read mode. The address is latched on rising edge of SCLK, and data of every two bits (interleave on 2 I/O pins) shift out on the falling edge of SCLK at a
maximum frequency fT. The first address byte can be at any location. The address is automatically increased to the
next higher address after each byte data is shifted out, so the whole memory can be read out at a single 2READ
instruction. The address counter rolls over to 0 when the highest address has been reached. Once writing 2READ
instruction, the following address/dummy/data out will perform as 2-bit instead of previous 1-bit.
The sequence of issuing 2READ instruction is: CS# goes low→ sending 2READ instruction→ 24-bit address interleave on SIO1 & SIO0→ 4 dummy cycles on SIO1 & SIO0→ data out interleave on SIO1 & SIO0→ to end 2READ
operation can use CS# to high at any time during data out.
While Program/Erase/Write Status Register cycle is in progress, 2READ instruction is rejected without any impact
on the Program/Erase/Write Status Register current cycle.
Figure 30. 2 x I/O Read Mode Sequence (SPI Mode only)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10
17 18 19 20 21 22 23 24 25 26 27 28 29 30
Mode 3
SCLK
Mode 0
Command
SI/SIO0
SO/SIO1
P/N: PM1728
BBh
12 ADD Cycles
4 Dummy
cycle
Data
Out 1
Data
Out 2
A22 A20 A18
A4 A2 A0
D6 D4 D2 D0 D6 D4 D2 D0
A23 A21 A19
A5 A3 A1
D7 D5 D3 D1 D7 D5 D3 D1
Macronix Proprietary
41
Mode 0
Rev. 1.9, March 13, 2019
MX25U12835F
9-14. Quad Read Mode (QREAD)
The QREAD instruction enable quad throughput of Serial NOR Flash in read mode. A Quad Enable (QE) bit of
status Register must be set to "1" before sending the QREAD instruction. The address is latched on rising edge of
SCLK, and data of every four bits (interleave on 4 I/O pins) shift out on the falling edge of SCLK at a maximum frequency fQ. The first address byte can be at any location. The address is automatically increased to the next higher
address after each byte data is shifted out, so the whole memory can be read out at a single QREAD instruction.
The address counter rolls over to 0 when the highest address has been reached. Once writing QREAD instruction,
the following data out will perform as 4-bit instead of previous 1-bit.
The sequence of issuing QREAD instruction is: CS# goes low→ sending QREAD instruction → 3-byte address on
SI → 8-bit dummy cycle → data out interleave on SIO3, SIO2, SIO1 & SIO0→ to end QREAD operation can use
CS# to high at any time during data out.
While Program/Erase/Write Status Register cycle is in progress, QREAD instruction is rejected without any impact
on the Program/Erase/Write Status Register current cycle.
Figure 31. Quad Read Mode Sequence (Command 6B)
CS#
0
1
2
3
4
5
6
7
8
…
Command
SI/SIO0
SO/SIO1
SIO2
SIO3
P/N: PM1728
29 30 31 32 33
9
SCLK
6B
…
24 ADD Cycles
A23 A22
…
38 39 40 41 42
A2 A1 A0
High Impedance
8 dummy cycles
Data Data
Out 1 Out 2
Data
Out 3
D4 D0 D4 D0 D4
D5 D1 D5 D1 D5
High Impedance
D6 D2 D6 D2 D6
High Impedance
D7 D3 D7 D3 D7
Macronix Proprietary
42
Rev. 1.9, March 13, 2019
MX25U12835F
9-15. 4 x I/O Read Mode (4READ)
The 4READ instruction enable quad throughput of Serial NOR Flash in read mode. A Quad Enable (QE) bit of status
Register must be set to "1" before sending the 4READ instruction. The address is latched on rising edge of SCLK,
and data of every four bits (interleave on 4 I/O pins) shift out on the falling edge of SCLK at a maximum frequency
fQ. The first address byte can be at any location. The address is automatically increased to the next higher address
after each byte data is shifted out, so the whole memory can be read out at a single 4READ instruction. The address
counter rolls over to 0 when the highest address has been reached. Once writing 4READ instruction, the following
address/dummy/data out will perform as 4-bit instead of previous 1-bit.
4 x I/O Read on SPI Mode (4READ) The sequence of issuing 4READ instruction is: CS# goes low→ sending
4READ instruction→ 24-bit address interleave on SIO3, SIO2, SIO1 & SIO0→2+4 dummy cycles→data out interleave on SIO3, SIO2, SIO1 & SIO0→ to end 4READ operation can use CS# to high at any time during data out.
4 x I/O Read on QPI Mode (4READ) The 4READ instruction also support on QPI command mode. The sequence
of issuing 4READ instruction QPI mode is: CS# goes low→ sending 4READ instruction→ 24-bit address interleave
on SIO3, SIO2, SIO1 & SIO0→2+4 dummy cycles (default) →data out interleave on SIO3, SIO2, SIO1 & SIO0→ to
end 4READ operation can use CS# to high at any time during data out.
Another sequence of issuing 4READ instruction especially useful in random access is: CS# goes low→send 4READ
instruction→3-bytes address interleave on SIO3, SIO2, SIO1 & SIO0→performance enhance toggling bit P[7:0]→
4 dummy cycles →data out until CS# goes high → CS# goes low (The following 4READ instruction is not allowed,
hence 8 cycles of 4READ can be saved comparing to normal 4READ mode) → 24-bit random access address.
In the performance-enhancing mode, P[7:4] must be toggling with P[3:0] ; likewise P[7:0]=A5h, 5Ah, F0h or 0Fh can
make this mode continue and reduce the next 4READ instruction. Once P[7:4] is no longer toggling with P[3:0]; likewise P[7:0]=FFh,00h,AAh or 55h and afterwards CS# is raised and then lowered, the system then will escape from
performance enhance mode and return to normal operation.
While Program/Erase/Write Status Register cycle is in progress, 4READ instruction is rejected without any impact
on the Program/Erase/Write Status Register current cycle.
W4READ instruction (E7h) is also available for 4 I/O read. Please refer to "Figure 36. W4READ (Quad Read with 4 dummy cycles) Sequence".
P/N: PM1728
Macronix Proprietary
43
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 32. 4 x I/O Read Mode Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Mode 3
SCLK
Mode 0
Command
6 ADD Cycles
EBh
Performance
enhance
indicator (Note2)
4 Dummy
Cycles
Data
Out 1
Data
Out 2
Data
Out 3
A20 A16 A12 A8 A4 A0 P4 P0
D4 D0 D4 D0 D4 D0
SIO1
A21 A17 A13 A9 A5 A1 P5 P1
D5 D1 D5 D1 D5 D1
SIO2
A22 A18 A14 A10 A6 A2 P6 P2
D6 D2 D6 D2 D6 D2
SIO3
A23 A19 A15 A11 A7 A3 P7 P3
D7 D3 D7 D3 D7 D3
SIO0
Mode 0
Figure 33. 4 x I/O Read Mode Sequence (SPI Mode), for MX25U12835FZNI-08G only
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Mode 3
SCLK
Mode 0
Command
6 ADD Cycles
Configurable
Dummy cycles
(Note 3)
Performance
enhance
indicator (Note2)
EBh
Data
Out 1
Data
Out 2
Data
Out 3
A20 A16 A12 A8 A4 A0 P4 P0
D4 D0 D4 D0 D4 D0
SIO1
A21 A17 A13 A9 A5 A1 P5 P1
D5 D1 D5 D1 D5 D1
SIO2
A22 A18 A14 A10 A6 A2 P6 P2
D6 D2 D6 D2 D6 D2
SIO3
A23 A19 A15 A11 A7 A3 P7 P3
D7 D3 D7 D3 D7 D3
SIO0
Mode 0
Note:
1. Hi-impedance is inhibited for the two clock cycles.
2. P7≠P3, P6≠P2, P5≠P1 & P4≠P0 (Toggling) is inhibited.
3. The Configurable Dummy Cycle (default = 6) is set by Configuration Register Bit . Please check "Dummy Cycle and
Frequency Table" for details.
P/N: PM1728
Macronix Proprietary
44
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 34. 4 x I/O Read Mode Sequence (QPI Mode)
CS#
MODE 3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
MODE 3
SCLK
MODE 0
MODE 0
SIO[3:0]
EB
A5 A4 A3 A2 A1 A0
Data In
24-bit Address
X
X
X
X
X
X
H0 L0 H1 L1 H2 L2 H3 L3
MSB
Data Out
Figure 35. 4 x I/O Read Mode Sequence (QPI Mode), for MX25U12835FZNI-08G only
CS#
MODE 3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
MODE 3
SCLK
MODE 0
SIO[3:0]
MODE 0
EB
Data In
A5
A4
A3
A2
24-bit Address
(Note)
A1
A0
X
X
X
X
X
Configurable
Dummy cycle
X
H0
L0
H1
L1
H2
L2
H3
L3
MSB
Data Out
Note: The Configurable Dummy Cycle (default = 6) is set by Configuration Register Bit. Please check "Dummy Cycle
and Frequency Table" for details.
P/N: PM1728
Macronix Proprietary
45
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 36. W4READ (Quad Read with 4 dummy cycles) Sequence
CS#
Mode 3
SCLK
０
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mode ０
4 Dummy
Cycles
Data
Out 2
Data
Out 3
A20 A16 A12 A8 A4 A0
D4 D0 D4 D0
D4 D0
D4
SIO1
A21 A17 A13 A9 A5 A1
D5 D1 D5 D1
D5 D1
D5
SIO2
A22 A18 A14 A10 A6 A2
D6 D2 D6 D2
D6 D2
D6
SIO3
A23 A19 A15 A11 A7 A3
D7 D3 D7 D3
D7 D3
D7
Command
SIO0
P/N: PM1728
E7h
6 ADD Cycles
Macronix Proprietary
46
Data
Out 1
Rev. 1.9, March 13, 2019
MX25U12835F
9-16. Burst Read
This device supports Burst Read in both SPI and QPI mode.
To set the Burst length, following command operation is required
Issuing command: “C0h” in the first Byte (8-clocks), following 4 clocks defining wrap around enable with “0h” and
disable with“1h”.
Next 4 clocks is to define wrap around depth. Definition as following table:
Data
00h
01h
02h
03h
1xh
Wrap Around
Yes
Yes
Yes
Yes
No
Wrap Depth
8-byte
16-byte
32-byte
64-byte
X
The wrap around unit is defined within the 256Byte page, with random initial address. It’s defined as “wrap-around
mode disable” for the default state of the device. To exit wrap around, it is required to issue another “C0h” command
in which data=‘1xh”. Otherwise, wrap around status will be retained until power down or reset command. To change
wrap around depth, it is requried to issue another “C0h” command in which data=“0xh”. QPI “0Bh” “EBh” and SPI “EBh”
“E7h” support wrap around feature after wrap around enable. However, the RDID command is default without Burst
read.
Figure 37. Burst Read (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9
D7
D6
10
11
12
13
14
15
SCLK
Mode 0
SIO
C0h
D5
D4
D3
D2
D1
D0
Figure 38. Burst Read (QPI Mode)
CS#
Mode 3
0
1
2
3
H0
L0
SCLK
Mode 0
SIO[3:0]
C0h
MSB
LSB
Note: MSB=Most Significant Bit
LSB=Least Significant Bit
P/N: PM1728
Macronix Proprietary
47
Rev. 1.9, March 13, 2019
MX25U12835F
9-17. Performance Enhance Mode
The device could waive the command cycle bits if the two cycle bits after address cycle toggles.
Performance enhance mode is supported in both SPI and QPI mode.
In QPI mode, “EBh” “0Bh” and SPI “EBh” “E7h” commands support enhance mode. The performance enhance
mode is not supported in dual I/O mode.
After entering enhance mode, following CS# go high, the device will stay in the read mode and treat CS# go low of
the first clock as address instead of command cycle.
To exit enhance mode, a new fast read command whose first two dummy cycles is not toggle then exit. Or issue
”FFh” data cycle to exit enhance mode.
P/N: PM1728
Macronix Proprietary
48
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 39. 4 x I/O Read Performance Enhance Mode Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22
n
SCLK
Mode 0
Data
Out 2
Data
Out n
A20 A16 A12 A8 A4 A0 P4 P0
D4 D0 D4 D0
D4 D0
SIO1
A21 A17 A13 A9 A5 A1 P5 P1
D5 D1 D5 D1
D5 D1
SIO2
A22 A18 A14 A10 A6 A2 P6 P2
D6 D2 D6 D2
D6 D2
SIO3
A23 A19 A15 A11 A7 A3 P7 P3
D7 D3 D7 D3
D7 D3
Command
EBh
SIO0
6 ADD Cycles
Performance
enhance
indicator (Note)
4 Dummy
Cycles
Data
Out 1
CS#
n+1
...........
n+7 ...... n+9
........... n+13
...........
Mode 3
SCLK
6 ADD Cycles
Performance
enhance
indicator (Note)
4 Dummy
Cycles
Data
Out 1
Data
Out 2
Data
Out n
SIO0
A20 A16 A12 A8 A4 A0 P4 P0
D4 D0 D4 D0
D4 D0
SIO1
A21 A17 A13 A9 A5 A1 P5 P1
D5 D1 D5 D1
D5 D1
SIO2
A22 A18 A14 A10 A6 A2 P6 P2
D6 D2 D6 D2
D6 D2
SIO3
A23 A19 A15 A11 A7 A3 P7 P3
D7 D3 D7 D3
D7 D3
Mode 0
Note:
1. Performance enhance mode, if P7≠P3 & P6≠P2 & P5≠P1 & P4≠P0 (Toggling), ex: A5, 5A, 0F, if not using
performance enhance recommend to keep 1 or 0 in performance enhance indicator.
2. Reset the performance enhance mode, if P7=P3 or P6=P2 or P5=P1 or P4=P0, ex: AA, 00, FF.
P/N: PM1728
Macronix Proprietary
49
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 40. 4 x I/O Read Performance Enhance Mode Sequence (SPI Mode), for MX25U12835FZNI-08G only
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22
n
SCLK
Mode 0
Configurable
Dummy cycles
Data
Out 2
Data
Out n
A20 A16 A12 A8 A4 A0 P4 P0
D4 D0 D4 D0
D4 D0
SIO1
A21 A17 A13 A9 A5 A1 P5 P1
D5 D1 D5 D1
D5 D1
SIO2
A22 A18 A14 A10 A6 A2 P6 P2
D6 D2 D6 D2
D6 D2
SIO3
A23 A19 A15 A11 A7 A3 P7 P3
D7 D3 D7 D3
D7 D3
Command
EBh
SIO0
6 ADD Cycles
Performance
enhance
indicator (Note1)
(Note 2)
Data
Out 1
CS#
n+1
...........
n+7 ...... n+9
........... n+13
...........
Mode 3
SCLK
6 ADD Cycles
Configurable
Dummy cycles
Performance
enhance
indicator (Note1)
Data
Out 1
(Note 2)
Data
Out 2
Data
Out n
SIO0
A20 A16 A12 A8 A4 A0 P4 P0
D4 D0 D4 D0
D4 D0
SIO1
A21 A17 A13 A9 A5 A1 P5 P1
D5 D1 D5 D1
D5 D1
SIO2
A22 A18 A14 A10 A6 A2 P6 P2
D6 D2 D6 D2
D6 D2
SIO3
A23 A19 A15 A11 A7 A3 P7 P3
D7 D3 D7 D3
D7 D3
Mode 0
Note:
1. Performance enhance mode, if P7≠P3 & P6≠P2 & P5≠P1 & P4≠P0 (Toggling), ex: A5, 5A, 0F, if not using
performance enhance recommend to keep 1 or 0 in performance enhance indicator.
Reset the performance enhance mode, if P7=P3 or P6=P2 or P5=P1 or P4=P0, ex: AA, 00, FF.
2. The Configurable Dummy Cycle (default = 6) is set by Configuration Register Bit. Please refer to "Dummy Cycle
and Frequency Table" for details.
P/N: PM1728
Macronix Proprietary
50
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 41. 4 x I/O Read Performance Enhance Mode Sequence (QPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
A1
A0
8
9
10
11
12
13
14
15
16
17
H0
L0
H1
L1
SCLK
Mode 0
SIO[3:0]
A5
EBh
A4
A3
A2
X
X
X
X
MSB LSB MSB LSB
P(7:4) P(3:0)
Data In
4 dummy
cycles
performance
enhance
indicator
Data Out
CS#
n+1
.............
SCLK
Mode 0
SIO[3:0]
A5
A4
A3
A2
A1
X
A0
X
X
X
P(7:4) P(3:0)
6 Address cycles
H0
L0
H1
L1
MSB LSB MSB LSB
4 dummy
cycles
performance
enhance
indicator
Data Out
Note: Reset the performance enhance mode, if P7=P3 or P6=P2 or P5=P1 or P4=P0, ex: AA, 00, FF.
Figure 42. 4 x I/O Read Performance Enhance Mode Sequence (QPI Mode), for MX25U12835FZNI-08G only
CS#
MODE 3
0
1
2
3
4
5
6
7
A1
A0
8
9
10
11
12
13
14
15
16
17
H0
L0
H1
L1
SCLK
MODE 0
SIO[3:0]
EBh
A5
A4
A3
A2
X
X
X
X
MSB LSB MSB LSB
P(7:4) P(3:0)
Data In
performance
enhance
indicator
Configurable Dummy cycles
(Note)
Data Out
CS#
n+1
.............
SCLK
MODE 0
SIO[3:0]
A5
A4
A3
A2
A1
6 Address cycles
X
A0
X
X
X
H0
L0
H1
L1
MSB LSB MSB LSB
P(7:4) P(3:0)
performance
enhance
indicator
Configurable Dummy cycles
(Note)
Data Out
Note:
1. The Configurable Dummy Cycle (default = 6) is set by Configuration Register Bit . Please refer to "Dummy Cycle
and Frequency Table" for details.
2. Reset the performance enhance mode, if P7=P3 or P6=P2 or P5=P1 or P4=P0, ex: AA, 00, FF.
P/N: PM1728
Macronix Proprietary
51
Rev. 1.9, March 13, 2019
MX25U12835F
9-18. Sector Erase (SE)
The Sector Erase (SE) instruction is for erasing the data of the chosen sector to be "1". The instruction is used for
any 4K-byte sector. A Write Enable (WREN) instruction must execute to set the Write Enable Latch (WEL) bit before
sending the Sector Erase (SE). Any address of the sector (Please refer to "Table 4. Memory Organization") is a valid
address for Sector Erase (SE) instruction. The CS# must go high exactly at the byte boundary (the least significant
bit of the address been latched-in); otherwise, the instruction will be rejected and not executed.
Address bits [Am-A12] (Am is the most significant address) select the sector address.
The sequence of issuing SE instruction is: CS# goes low→ sending SE instruction code→ 3-byte address on SI→
CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The self-timed Sector Erase Cycle time (tSE) is initiated as soon as Chip Select (CS#) goes high. The Write in
Progress (WIP) bit still can be checked while the Sector Erase cycle is in progress. The WIP sets during the tSE
timing, and clears when Sector Erase Cycle is completed, and the Write Enable Latch (WEL) bit is cleared. If the
sector is protected by BP3, BP2, BP1, BP0 bits, the Sector Erase (SE) instruction will not be executed on the
sector.
Figure 43. Sector Erase (SE) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9
29 30 31
SCLK
Mode 0
24-Bit Address
Command
SI
23 22
20h
2
1
0
MSB
Figure 44. Sector Erase (SE) Sequence (QPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
SCLK
Mode 0
24-Bit Address
Command
SIO[3:0]
20h A5 A4 A3 A2 A1 A0
MSB LSB
P/N: PM1728
Macronix Proprietary
52
Rev. 1.9, March 13, 2019
MX25U12835F
9-19. Block Erase (BE32K)
The Block Erase (BE32K) instruction is for erasing the data of the chosen block to be "1". The instruction is used
for 32K-byte block erase operation. A Write Enable (WREN) instruction must be executed to set the Write Enable
Latch (WEL) bit before sending the Block Erase (BE32K). Any address of the block (Please refer to "Table 4. Memory
Organization") is a valid address for Block Erase (BE32K) instruction. The CS# must go high exactly at the byte
boundary (the least significant bit of address byte been latched-in); otherwise, the instruction will be rejected and not
executed.
The sequence of issuing BE32K instruction is: CS# goes low→ sending BE32K instruction code→ 3-byte address
on SI→CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The self-timed Block Erase Cycle time (tBE32K) is initiated as soon as Chip Select (CS#) goes high. The Write
in Progress (WIP) bit still can be checked during the Block Erase cycle is in progress. The WIP sets 1 during the
tBE32K timing, and sets 0 when Block Erase Cycle is completed, and the Write Enable Latch (WEL) bit is reset. If
the block is protected by BP3, BP2, BP1, BP0 bits, the Block Erase (tBE32K) instruction will not be executed on the
block.
Figure 45. Block Erase 32KB (BE32K) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9
29 30 31
SCLK
Mode 0
Command
SI
24-Bit Address
23 22
52h
2
1
0
MSB
Figure 46. Block Erase 32KB (BE32K) Sequence (QPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
SCLK
Mode 0
24-Bit Address
Command
SIO[3:0]
52h
A5 A4 A3 A2 A1 A0
MSB
P/N: PM1728
Macronix Proprietary
53
Rev. 1.9, March 13, 2019
MX25U12835F
9-20. Block Erase (BE)
The Block Erase (BE) instruction is for erasing the data of the chosen block to be "1". The instruction is used
for 64K-byte block erase operation. A Write Enable (WREN) instruction must be executed to set the Write Enable
Latch (WEL) bit before sending the Block Erase (BE). Any address of the block (Please refer to "Table 4. Memory
Organization") is a valid address for Block Erase (BE) instruction. The CS# must go high exactly at the byte boundary (the
least significant bit of address byte been latched-in); otherwise, the instruction will be rejected and not executed.
The sequence of issuing BE instruction is: CS# goes low→ sending BE instruction code→ 3-byte address on SI→
CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The self-timed Block Erase Cycle time (tBE) is initiated as soon as Chip Select (CS#) goes high. The Write in
Progress (WIP) bit still can be checked while the Block Erase cycle is in progress. The WIP sets during the tBE
timing, and clears when Block Erase Cycle is completed, and the Write Enable Latch (WEL) bit is cleared. If the
block is protected by BP3, BP2, BP1, BP0 bits, the Block Erase (BE) instruction will not be executed on the block.
Figure 47. Block Erase (BE) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9
29 30 31
SCLK
Mode 0
Command
SI
24-Bit Address
23 22
D8h
2
1
0
MSB
Figure 48. Block Erase (BE) Sequence (QPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
SCLK
Mode 0
24-Bit Address
Command
SIO[3:0]
D8h
A5 A4 A3 A2 A1 A0
MSB
P/N: PM1728
Macronix Proprietary
54
Rev. 1.9, March 13, 2019
MX25U12835F
9-21. Chip Erase (CE)
The Chip Erase (CE) instruction is for erasing the data of the whole chip to be "1". A Write Enable (WREN) instruction must be executed to set the Write Enable Latch (WEL) bit before sending the Chip Erase (CE). The CS# must
go high exactly at the byte boundary, otherwise the instruction will be rejected and not executed.
The sequence of issuing CE instruction is: CS# goes low→sending CE instruction code→CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The self-timed Chip Erase Cycle time (tCE) is initiated as soon as Chip Select (CS#) goes high. The Write in Progress (WIP) bit still can be checked during the Chip Erase cycle is in progress. The WIP sets during the tCE timing,
and clears when Chip Erase Cycle is completed, and the Write Enable Latch (WEL) bit is cleared. If the chip is protected by BP3, BP2, BP1, BP0 bits, the Chip Erase (CE) instruction will not be executed. It will be only executed
when BP3, BP2, BP1, BP0 all set to "0".
Figure 49. Chip Erase (CE) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
SCLK
Mode 0
Command
SI
60h or C7h
Figure 50. Chip Erase (CE) Sequence (QPI Mode)
CS#
Mode 3
0
1
SCLK
Mode 0
Command
SIO[3:0]
P/N: PM1728
60h or C7h
Macronix Proprietary
55
Rev. 1.9, March 13, 2019
MX25U12835F
9-22. Page Program (PP)
The Page Program (PP) instruction is for programming the memory to be "0". A Write Enable (WREN) instruction
must be executed to set the Write Enable Latch (WEL) bit before sending the Page Program (PP). The device programs only the last 256 data bytes sent to the device. The last address byte (the 8 least significant address bits,
A7-A0) should be set to 0 for 256 bytes page program. If A7-A0 are not all zero, transmitted data that exceed page
length are programmed from the starting address (24-bit address that last 8 bit are all 0) of currently selected page.
If the data bytes sent to the device exceeds 256, the last 256 data byte is programmed at the request page and
previous data will be disregarded. If the data bytes sent to the device has not exceeded 256, the data will be programmed at the request address of the page. There will be no effort on the other data bytes of the same page.
The sequence of issuing PP instruction is: CS# goes low→ sending PP instruction code→ 3-byte address on SI→ at
least 1-byte on data on SI→ CS# goes high.
The CS# must be kept low during the whole Page Program cycle; The CS# must go high exactly at the byte boundary (the
latest eighth bit of data being latched in), otherwise the instruction will be rejected and will not be executed.
The self-timed Page Program Cycle time (tPP) is initiated as soon as Chip Select (CS#) goes high. The Write in
Progress (WIP) bit still can be checked during the Page Program cycle is in progress. The WIP sets 1 during the
tPP timing, and sets 0 when Page Program Cycle is completed, and the Write Enable Latch (WEL) bit is reset. If the
page is protected by BP3, BP2, BP1, BP0 bits, the Page Program (PP) instruction will not be executed.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
P/N: PM1728
Macronix Proprietary
56
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 51. Page Program (PP) Sequence (SPI Mode)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10
28 29 30 31 32 33 34 35 36 37 38 39
SCLK
1
0
7
6
5
3
2
1
0
2079
2
2078
3
2077
23 22 21
02h
SI
Data Byte 1
24-Bit Address
2076
Command
2075
Mode 0
4
1
0
MSB
MSB
2074
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
2073
2072
CS#
SCLK
Data Byte 2
7
SI
6
5
4
3
2
Data Byte 3
1
MSB
0
7
6
5
4
3
2
Data Byte 256
1
7
0
MSB
6
5
4
3
2
MSB
Figure 52. Page Program (PP) Sequence (QPI Mode)
CS#
Mode 3
0
1
2
SCLK
Mode 0
Command
SIO[3:0]
02h
Data In
P/N: PM1728
24-Bit Address
A5
A4
A3
A2
A1
A0
H0
L0
H1
L1
H2
L2
H3
L3
Data Byte Data Byte Data Byte Data Byte
1
2
3
4
Macronix Proprietary
57
H255 L255
......
Data Byte
256
Rev. 1.9, March 13, 2019
MX25U12835F
9-23. 4 x I/O Page Program (4PP)
The Quad Page Program (4PP) instruction is for programming the memory to be "0". A Write Enable (WREN) instruction must execute to set the Write Enable Latch (WEL) bit and Quad Enable (QE) bit must be set to "1" before
sending the Quad Page Program (4PP). The Quad Page Programming takes four pins: SIO0, SIO1, SIO2, and
SIO3 as address and data input, which can improve programmer performance and the effectiveness of application.
The 4PP operation frequency supports as fast as 104MHz. The other function descriptions are as same as standard
page program.
The sequence of issuing 4PP instruction is: CS# goes low→ sending 4PP instruction code→ 3-byte address on
SIO[3:0]→ at least 1-byte on data on SIO[3:0]→CS# goes high.
Figure 53. 4 x I/O Page Program (4PP) Sequence (SPI Mode only)
CS#
Mode 3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21
SCLK
Mode 0
SIO0
P/N: PM1728
Command
38h
6 ADD cycles
Data Data Data Data
Byte 1 Byte 2 Byte 3 Byte 4
A20 A16 A12 A8 A4 A0 D4 D0 D4 D0 D4 D0 D4 D0
SIO1
A21 A17 A13 A9 A5 A1 D5 D1 D5 D1 D5 D1 D5 D1
SIO2
A22 A18 A14 A10 A6 A2 D6 D2 D6 D2 D6 D2 D6 D2
SIO3
A23 A19 A15 A11 A7 A3
Macronix Proprietary
58
D7 D3 D7 D3
D7 D3 D7 D3
Rev. 1.9, March 13, 2019
MX25U12835F
9-24. Deep Power-down (DP)
The Deep Power-down (DP) instruction is for setting the device on the minimizing the power consumption (to entering the Deep Power-down mode), the standby current is reduced from ISB1 to ISB2). The Deep Power-down mode
requires the Deep Power-down (DP) instruction to enter, during the Deep Power-down mode, the device is not active and all Write/Program/Erase instruction are ignored. When CS# goes high, it's only in deep power-down mode
not standby mode. It's different from Standby mode.
The sequence of issuing DP instruction is: CS# goes low→sending DP instruction code→CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
Once the DP instruction is set, all instructions will be ignored except the Release from Deep Power-down mode
(RDP) and Read Electronic Signature (RES) instruction and softreset command. (those instructions allow the ID being reading out). When Power-down, or software reset command the deep power-down mode automatically stops,
and when power-up, the device automatically is in standby mode. For DP instruction the CS# must go high exactly
at the byte boundary (the latest eighth bit of instruction code been latched-in); otherwise, the instruction will not be
executed. As soon as Chip Select (CS#) goes high, a delay of tDP is required before entering the Deep Power-down
mode.
Figure 54. Deep Power-down (DP) Sequence (SPI Mode)
CS#
0
Mode 3
1
2
3
4
5
6
tDP
7
SCLK
Mode 0
Command
B9h
SI
Stand-by Mode
Deep Power-down Mode
Figure 55. Deep Power-down (DP) Sequence (QPI Mode)
CS#
Mode 3
0
tDP
1
SCLK
Mode 0
Command
SIO[3:0]
B9h
Stand-by Mode
P/N: PM1728
Deep Power-down Mode
Macronix Proprietary
59
Rev. 1.9, March 13, 2019
MX25U12835F
9-25. Enter Secured OTP (ENSO)
The ENSO instruction is for entering the additional 4K-bit secured OTP mode. The additional 4K-bit secured OTP is
independent from main array, which may use to store unique serial number for system identifier. After entering the
Secured OTP mode, and then follow standard read or program procedure to read out the data or update data. The
Secured OTP data cannot be updated again once it is lock-down.
The sequence of issuing ENSO instruction is: CS# goes low→ sending ENSO instruction to enter Secured OTP
mode→ CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
Please note that WRSR/WRSCUR commands are not acceptable during the access of secure OTP region, once security OTP is lock down, only read related commands are valid.
9-26. Exit Secured OTP (EXSO)
The EXSO instruction is for exiting the additional 4K-bit secured OTP mode.
The sequence of issuing EXSO instruction is: CS# goes low→ sending EXSO instruction to exit Secured OTP
mode→ CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
9-27. Read Security Register (RDSCUR)
The RDSCUR instruction is for reading the value of Security Register bits. The Read Security Register can be read
at any time (even in program/erase/write status register/write security register condition) and continuously.
The sequence of issuing RDSCUR instruction is : CS# goes low→sending RDSCUR instruction→Security Register
data out on SO→ CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The definition of the Security Register bits is as below:
Secured OTP Indicator bit. The Secured OTP indicator bit shows the secured OTP area is locked by factory before
exit factory or not. When it is "0", it indicates non-factory lock; "1" indicates factory-lock.
Lock-down Secured OTP (LDSO) bit. By writing WRSCUR instruction, the LDSO bit may be set to "1" for customer lock-down purpose. However, once the bit is set to "1" (lock-down), the LDSO bit and the 4K-bit Secured OTP
area cannot be update any more. While it is in 4K-bit secured OTP mode, main array access is not allowed.
P/N: PM1728
Macronix Proprietary
60
Rev. 1.9, March 13, 2019
MX25U12835F
Table 9. Security Register Definition
bit7
bit6
bit5
bit4
bit3
bit2
WPSEL
E_FAIL
P_FAIL
Reserved
0=BP
protection
mode
1=individual
mode
(default=0)
0=normal
Erase
succeed
1=individual
Erase failed
(default=0)
0=normal
Program
succeed
1=indicate
Program
failed
(default=0)
-
0=Erase
is not
suspended
1= Erase
suspended
(default=0)
Non-volatile
bit (OTP)
Volatile bit
Volatile bit
Volatile bit
Volatile bit
ESB
PSB
(Erase
(Program
Suspend bit) Suspend bit)
bit1
bit0
LDSO
Secured OTP
(indicate if
indicator bit
lock-down)
0 = not lock0=Program
0 = nondown
is not
factory
1 = lock-down
suspended
lock
(cannot
1= Program
1 = factory
program/
suspended
erase
lock
(default=0)
OTP)
Volatile bit
Non-volatile
bit
(OTP)
Non-volatile
bit (OTP)
9-28. Write Security Register (WRSCUR)
The WRSCUR instruction is for setting the values of Security Register Bits. The WREN (Write Enable) instruction is
required before issuing WRSCUR instruction. The WRSCUR instruction may change the values of bit1 (LDSO bit)
for customer to lock-down the 4K-bit Secured OTP area. Once the LDSO bit is set to "1", the Secured OTP area
cannot be updated any more. The LDSO bit is an OTP bit. Once the LDSO bit is set, the value of LDSO bit can notbe altered any more.
The sequence of issuing WRSCUR instruction is :CS# goes low→ sending WRSCUR instruction → CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The CS# must go high exactly at the boundary; otherwise, the instruction will be rejected and not executed.
Figure 56. Write Security Register (WRSCUR) Sequence (Command 2F)
CS#
0
1
2
3
4
5
6
7
SCLK
Command
SI
P/N: PM1728
2F
Macronix Proprietary
61
Rev. 1.9, March 13, 2019
MX25U12835F
9-29. Write Protection Selection (WPSEL)
There are two write protection methods, (1) BP protection mode (2) individual block protection mode. If WPSEL=0,
flash is under BP protection mode . If WPSEL=1, flash is under individual block protection mode. The default value
of WPSEL is “0”. WPSEL command can be used to set WPSEL=1. Please note that WPSEL is an OTP bit. Once
WPSEL is set to 1, there is no chance to recover WPSEL bit back to “0”. If the flash is under BP mode, the individual block protection mode is disabled. Contrarily, if flash is on the individual block protection mode, the BP mode
is disabled.
Every time after the system is powered-on, and the Security Register bit 7 is checked to be WPSEL=1, all
the blocks or sectors will be write protected by default. User may only unlock the blocks or sectors via SBULK
and GBULK instruction. Program or erase functions can only be operated after the Unlock instruction is conducted.
BP protection mode, WPSEL=0:
ARRAY is protected by BP3-BP0 and BP3-BP0 bits are protected by “SRWD=1 and WP#=0”, where SRWD is bit 7
of status register that can be set by WRSR command.
Individual block protection mode, WPSEL=1:
Blocks are individually protected by their own SRAM lock bits which are set to “1” after power up. SBULK and SBLK
command can set SRAM lock bit to “0” and “1”. When the system accepts and executes WPSEL instruction, the bit
7 in security register will be set. It will activate SBLK, SBULK, RDBLOCK, GBLK, GBULK etc instructions to conduct
block lock protection and replace the original Software Protect Mode (SPM) use (BP3-BP0) indicated block methods.Under the individual block protection mode (WPSEL=1), hardware protection is performed by driving WP#=0.
Once WP#=0 all array blocks/sectors are protected regardless of the contents of SRAM lock bits.
The sequence of issuing WPSEL instruction is: CS# goes low → sending WPSEL instruction to enter the individual
block protect mode → CS# goes high. Please refer to "Figure 59. Write Protection Selection (WPSEL) Sequence (Command
68)".
WPSEL instruction function flow is as follows:
Figure 57. BP and SRWD if WPSEL=0
WP# pin
BP3
BP2
BP1
BP0
SRWD
64KB
64KB
64KB
.
.
.
(1) BP3-BP0 is used to define the protection group region.
(For the protected area size, please refer to "Table 2. Protected Area Sizes")
(2) “SRWD=1 and WP#=0” is used to protect BP3-BP0. In this
case, SRWD and BP3-BP0 of status register bits can not
be changed by WRSR
64KB
P/N: PM1728
Macronix Proprietary
62
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 58. The individual block lock mode is effective after setting WPSEL=1
SRAM
SRAM
…
…
TOP 4KBx16
Sectors
4KB
4KB
4KB
SRAM
SRAM
• SBLK/SBULK(36h/39h):
- SBLK(36h): Set SRAM bit=1 (protect) : array can not be
programmed/erased
- SBULK(39h): Set SRAM bit=0 (unprotect): array can be
programmed/erased
- All top 4KBx16 sectors and bottom 4KBx16 sectors
and other 64KB uniform blocks can be protected and
unprotected by SRAM bits individually by SBLK/SBULK
command set.
…
64KB
• Power-Up: All SRAM bits=1 (all blocks are default protected).
All array cannot be programmed/erased
SRAM
…
• GBLK/GBULK(7Eh/98h):
- GBLK(7Eh): Set all SRAM bits=1,whole chip is protected
and cannot be programmed/erased.
- GBULK(98h): Set all SRAM bits=0,whole chip is
unprotected and can be programmed/erased.
- All sectors and blocks SRAM bits of whole chip can be
protected and unprotected at one time by GBLK/GBULK
command set.
……
Uniform
64KB blocks
64KB
SRAM
…
…
Bottom
4KBx16
Sectors
4KB
4KB
SRAM
• RDBLOCK(3Ch):
- use RDBLOCK mode to check the SRAM bits status after
SBULK /SBLK/GBULK/GBLK command set.
SBULK / SBLK / GBULK / GBLK / RDBLOCK
Figure 59. Write Protection Selection (WPSEL) Sequence (Command 68)
CS#
0
1
2
3
4
5
6
7
SCLK
Command
SI
P/N: PM1728
68
Macronix Proprietary
63
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 60. WPSEL Flow
start
WREN command
RDSCUR(2Bh) command
Yes
WPSEL=1?
No
WPSEL disable,
block protected by BP[3:0]
WPSEL(68h) command
RDSR command
No
WIP=0?
Yes
RDSCUR(2Bh) command
No
WPSEL=1?
Yes
WPSEL set successfully
WPSEL set fail
WPSEL enable.
Block protected by individual lock
(SBLK, SBULK, … etc).
P/N: PM1728
Macronix Proprietary
64
Rev. 1.9, March 13, 2019
MX25U12835F
9-30. Single Block Lock/Unlock Protection (SBLK/SBULK)
These instructions are only effective after WPSEL was executed. The SBLK instruction is for write protection a specified block (or sector) of memory, using AMAX-A16 or (AMAX-A12) address bits to assign a 64Kbyte block (or 4K bytes
sector) to be protected as read only. The SBULK instruction will cancel the block (or sector) write protection state.
This feature allows user to stop protecting the entire block (or sector) through the chip unprotect command (GBULK).
The WREN (Write Enable) instruction is required before issuing SBLK/SBULK instruction.
The sequence of issuing SBLK/SBULK instruction is: CS# goes low → send SBLK/SBULK (36h/39h)
instruction→send 3-byte address assign one block (or sector) to be protected on SI pin → CS# goes high. The CS#
must go high exactly at the byte boundary, otherwise the instruction will be rejected and not be executed.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
SBLK/SBULK instruction function flow is as follows:
Figure 61. Block Lock Flow
Start
RDSCUR(2Bh) command
WPSEL=1?
No
WPSEL command
Yes
WREN command
SBLK command
( 36h + 24bit address )
RDSR command
WIP=0?
No
Yes
RDBLOCK command
( 3Ch + 24bit address )
Data = FFh ?
No
Yes
Block lock successfully
Lock another block?
Block lock fail
Yes
No
Block lock
P/N: PM1728
completed
Macronix Proprietary
65
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 62. Block Unlock Flow
start
RDSCUR(2Bh) command
WPSEL=1?
No
WPSEL command
Yes
WREN command
SBULK command
( 39h + 24bit address )
RDSR command
No
WIP=0?
Yes
RDBLOCK command to verify
( 3Ch + 24bit address )
Data = FF ?
Yes
No
Block unlock successfully
Unlock another block?
Block unlock fail
Yes
Unlock block completed?
P/N: PM1728
Macronix Proprietary
66
Rev. 1.9, March 13, 2019
MX25U12835F
9-31. Read Block Lock Status (RDBLOCK)
This instruction is only effective after WPSEL was executed. The RDBLOCK instruction is for reading the status of
protection lock of a specified block (or sector), using AMAX-A16 (or AMAX-A12) address bits to assign a 64K bytes block (4K
bytes sector) and read protection lock status bit which the first byte of Read-out cycle. The status bit is"1" to indicate
that this block has be protected, that user can read only but cannot write/program /erase this block. The status bit is
"0" to indicate that this block hasn't be protected, and user can read and write this block.
The sequence of issuing RDBLOCK instruction is: CS# goes low → send RDBLOCK (3Ch) instruction → send
3-byte address to assign one block on SI pin → read block's protection lock status bit on SO pin → CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
9-32. Gang Block Lock/Unlock (GBLK/GBULK)
These instructions are only effective after WPSEL was executed. The GBLK/GBULK instruction is for enable/disable
the lock protection block of the whole chip.
The WREN (Write Enable) instruction is required before issuing GBLK/GBULK instruction.
The sequence of issuing GBLK/GBULK instruction is: CS# goes low → send GBLK/GBULK (7Eh/98h) instruction
→CS# goes high.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
The CS# must go high exactly at the byte boundary, otherwise, the instruction will be rejected and not be executed.
P/N: PM1728
Macronix Proprietary
67
Rev. 1.9, March 13, 2019
MX25U12835F
9-33. Program Suspend and Erase Suspend
The Suspend instruction interrupts a Page Program, Sector Erase, or Block Erase operation to allow access to the
memory array.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are don't care
when during SPI mode.
After the program or erase operation has entered the suspended state, the memory array can be read except for
the page being programmed or the sector or block being erased ("Table 10. Readable Area of Memory While a Program
or Erase Operation is Suspended").
Table 10. Readable Area of Memory While a Program or Erase Operation is Suspended
Suspended Operation
Readable Region of Memory Array
Page Program
All but the Page being programmed
Sector Erase (4KB)
All but the 4KB Sector being erased
Block Erase (32KB)
All but the 32KB Block being erased
Block Erase (64KB)
All but the 64KB Block being erased
When the Serial NOR Flash receives the Suspend instruction, there is a latency of tPSL or tESL ("Figure 63. Suspend
to Read Latency") before the Write Enable Latch (WEL) bit clears to “0” and the PSB or ESB sets to “1”, after which
the device is ready to accept one of the commands listed in "Table 11. Acceptable Commands During Program/Erase
Suspend after tPSL/tESL" (e.g. FAST READ). Refer to "Table 19. AC Characteristics" for tPSL and tESL timings.
"Table 12. Acceptable Commands During Suspend (tPSL/tESL not required)" lists the commands for which the tPSL and
tESL latencies do not apply. For example, RDSR, RDSCUR, RSTEN, and RST can be issued at any time after the
Suspend instruction.
Security Register bit 2 (PSB) and bit 3 (ESB) can be read to check the suspend status (please refer to "Table 9.
Security Register Definition"). The PSB (Program Suspend Bit) sets to “1” when a program operation is suspended.
The ESB (Erase Suspend Bit) sets to “1” when an erase operation is suspended. The PSB or ESB clears to “0”
when the program or erase operation is resumed.
Figure 63. Suspend to Read Latency
tPSL / tESL
CS#
Suspend Command
Read Command
tPSL: Program Latency
tESL: Erase Latency
P/N: PM1728
Macronix Proprietary
68
Rev. 1.9, March 13, 2019
MX25U12835F
Table 11. Acceptable Commands During Program/Erase Suspend after tPSL/tESL
Command Name
Command Code
READ
03h
FAST READ
0Bh
DREAD
3Bh
QREAD
6Bh
2READ
BBh
4READ
EBh
W4READ
E7h
RDSFDP
5Ah
RDID
9Fh
QPIID
AFh
REMS
90h
ENSO
B1h
EXSO
C1h
WREN
06h
EQIO
35h
RSTQIO
F5h
RESUME
30h
SBL
C0h
PP
02h
4PP
38h
Suspend Type
Program Suspend
Erase Suspend
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Table 12. Acceptable Commands During Suspend (tPSL/tESL not required)
Command Name
Command Code
WRDI
04h
RDSR
05h
RDCR
15h
RDSCUR
2Bh
RES
ABh
RSTEN
66h
RST
99h
NOP
00h
P/N: PM1728
Suspend Type
Program Suspend
•
•
•
•
•
•
•
Macronix Proprietary
69
Erase Suspend
•
•
•
•
•
•
•
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 64. Resume to Suspend Latency
CS#
tPRS / tERS
Resume
Command
Suspend
Command
tPRS: Program Resume to another Suspend
tERS: Erase Resume to another Suspend
9-33-1. Erase Suspend to Program
The “Erase Suspend to Program” feature allows Page Programming while an erase operation is suspended. Page
Programming is permitted in any unprotected memory except within the sector of a suspended Sector Erase
operation or within the block of a suspended Block Erase operation. The Write Enable (WREN) instruction must be
issued before any Page Program instruction.
A Page Program operation initiated within a suspended erase cannot itself be suspended and must be allowed to
finish before the suspended erase can be resumed. The Status Register can be polled to determine the status of
the Page Program operation. The WEL and WIP bits of the Status Register will remain “1” while the Page Program
operation is in progress and will both clear to “0” when the Page Program operation completes.
Figure 65. Suspend to Program Latency
CS#
Suspend Command
tPSL / tESL
Program Command
tPSL: Program Latency
tESL: Erase Latency
9-34. Program Resume and Erase Resume
The Resume instruction resumes a suspended Page Program, Sector Erase, or Block Erase operation. Before
issuing the Resume instruction to restart a suspended erase operation, make sure that there is no Page Program
operation in progress.
Immediately after the Serial NOR Flash receives the Resume instruction, the WEL and WIP bits are set to “1” and
the PSB or ESB is cleared to “0”. The program or erase operation will continue until finished ("Figure 66. Resume to
Read Latency") or until another Suspend instruction is received. A resume-to-suspend latency of tPRS or tERS must
be observed before issuing another Suspend instruction ("Figure 64. Resume to Suspend Latency").
Please note that the Resume instruction will be ignored if the Serial NOR Flash is in “Performance Enhance Mode”.
Make sure the Serial NOR Flash is not in “Performance Enhance Mode” before issuing the Resume instruction.
Figure 66. Resume to Read Latency
tSE/tBE/tPP
CS#
P/N: PM1728
Read Command
Resume Command
Macronix Proprietary
70
Rev. 1.9, March 13, 2019
MX25U12835F
9-35. No Operation (NOP)
The "No Operation" command is only able to terminate the Reset Enable (RSTEN) command and will not affect any
other command.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are "don't care"
in SPI mode.
9-36. Software Reset (Reset-Enable (RSTEN) and Reset (RST))
The Software Reset operation combines two instructions: Reset-Enable (RSTEN) command and Reset (RST)
command. It returns the device to standby mode. All the volatile bits and settings will be cleared then, which makes
the device return to the default status as power on.
To execute Reset command (RST), the Reset-Enable (RSTEN) command must be executed first to perform the
Reset operation. If there is any other command to interrupt after the Reset-Enable command, the Reset-Enable will
be invalid.
Both SPI (8 clocks) and QPI (2 clocks) command cycle can accept by this instruction. The SIO[3:1] are don't care
when during SPI mode.
If the Reset command is executed during program or erase operation, the operation will be disabled, the data under
processing could be damaged or lost.
The reset time is different depending on the last operation. For details, please refer to "Table 15-2. Reset Timing-(Other
Operation)" for tREADY2.
P/N: PM1728
Macronix Proprietary
71
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 67. Software Reset Recovery
Stand-by Mode
66
CS#
99
tReady2
Mode
Note: Refer to "Table 15-2. Reset Timing-(Other Operation)" for tREADY2 data.
Figure 68. Reset Sequence (SPI mode)
CS#
SCLK
Mode 3
Mode 3
Mode 0
Mode 0
Command
Command
99h
66h
SIO0
Figure 69. Reset Sequence (QPI mode)
tSHSL
CS#
MODE 3
MODE 3
MODE 3
SCLK
MODE 0
SIO[3:0]
P/N: PM1728
Command
MODE 0
66h
Command
MODE 0
99h
Macronix Proprietary
72
Rev. 1.9, March 13, 2019
MX25U12835F
9-37. Read SFDP Mode (RDSFDP)
The Serial Flash Discoverable Parameter (SFDP) standard provides a consistent method of describing the functional
and feature capabilities of serial flash devices in a standard set of internal parameter tables. These parameter tables
can be interrogated by host system software to enable adjustments needed to accommodate divergent features
from multiple vendors. The concept is similar to the one found in the Introduction of JEDEC Standard, JESD68 on
CFI.
The sequence of issuing RDSFDP instruction is same as CS# goes low→send RDSFDP instruction (5Ah)→send 3
address bytes on SI pin→send 1 dummy byte on SI pin→read SFDP code on SO→to end RDSFDP operation can
use CS# to high at any time during data out.
SFDP is a JEDEC Standard, JESD216.
Figure 70. Read Serial Flash Discoverable Parameter (RDSFDP) Sequence
CS#
0
1
2
3
4
5
6
7
8
9 10
28 29 30 31
SCLK
Command
SI
SO
24 BIT ADDRESS
23 22 21
5Ah
3
2
1
0
High-Z
CS#
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
SCLK
Dummy Cycle
SI
7
6
5
4
3
2
1
0
DATA OUT 2
DATA OUT 1
SO
7
6
5
4
3
2
0
7
MSB
MSB
P/N: PM1728
1
Macronix Proprietary
73
6
5
4
3
2
1
0
7
MSB
Rev. 1.9, March 13, 2019
MX25U12835F
Table 12. Signature and Parameter Identification Data Values
SFDP Table (JESD216) below is for MX25U12835FZNI-10G, MX25U12835FZ2I-10G, MX25U12835FZNI-08G,
MX25U12835FMI-10G and MX25U12835FM2I-10G
Description
SFDP Signature
Comment
Fixed: 50444653h
Add (h) DW Add Data (h/b) Data
(Byte)
(Bit)
(Note1)
(h)
00h
07:00
53h
53h
01h
15:08
46h
46h
02h
23:16
44h
44h
03h
31:24
50h
50h
SFDP Minor Revision Number
Start from 00h
04h
07:00
00h
00h
SFDP Major Revision Number
Start from 01h
This number is 0-based. Therefore,
0 indicates 1 parameter header.
05h
15:08
01h
01h
06h
23:16
01h
01h
07h
31:24
FFh
FFh
00h: it indicates a JEDEC specified
header.
08h
07:00
00h
00h
Start from 00h
09h
15:08
00h
00h
Start from 01h
0Ah
23:16
01h
01h
How many DWORDs in the
Parameter table
0Bh
31:24
09h
09h
0Ch
07:00
30h
30h
0Dh
15:08
00h
00h
0Eh
23:16
00h
00h
0Fh
31:24
FFh
FFh
it indicates Macronix manufacturer
ID
10h
07:00
C2h
C2h
Start from 00h
11h
15:08
00h
00h
Start from 01h
12h
23:16
01h
01h
How many DWORDs in the
Parameter table
13h
31:24
04h
04h
14h
07:00
60h
60h
15h
15:08
00h
00h
16h
23:16
00h
00h
17h
31:24
FFh
FFh
Number of Parameter Headers
Unused
ID number (JEDEC)
Parameter Table Minor Revision
Number
Parameter Table Major Revision
Number
Parameter Table Length
(in double word)
Parameter Table Pointer (PTP)
First address of JEDEC Flash
Parameter table
Unused
ID number
(Macronix manufacturer ID)
Parameter Table Minor Revision
Number
Parameter Table Major Revision
Number
Parameter Table Length
(in double word)
Parameter Table Pointer (PTP)
First address of Macronix Flash
Parameter table
Unused
P/N: PM1728
Macronix Proprietary
74
Rev. 1.9, March 13, 2019
MX25U12835F
Table 13. Parameter Table (0): JEDEC Flash Parameter Tables
SFDP Table below is for MX25U12835FZNI-10G, MX25U12835FZ2I-10G, MX25U12835FZNI-08G,
MX25U12835FMI-10G and MX25U12835FM2I-10G
Description
Comment
Block/Sector Erase sizes
00: Reserved, 01: 4KB erase,
10: Reserved,
11: not support 4KB erase
Write Granularity
0: 1Byte, 1: 64Byte or larger
Write Enable Instruction Required 0: not required
1: required 00h to be written to the
for Writing to Volatile Status
status register
Registers
Add (h) DW Add Data (h/b)
(Byte)
(Bit)
(Note1)
01b
02
1b
03
0b
30h
0: use 50h opcode,
1: use 06h opcode
Write Enable Opcode Select for
Note: If target flash status register is
Writing to Volatile Status Registers
nonvolatile, then bits 3 and 4 must
be set to 00b.
Contains 111b and can never be
Unused
changed
4KB Erase Opcode
01:00
31h
Data
(h)
E5h
04
0b
07:05
111b
15:08
20h
16
1b
18:17
00b
19
0b
20
1b
20h
(1-1-2) Fast Read (Note2)
0=not support 1=support
Address Bytes Number used in
addressing flash array
Double Transfer Rate (DTR)
Clocking
00: 3Byte only, 01: 3 or 4Byte,
10: 4Byte only, 11: Reserved
(1-2-2) Fast Read
0=not support 1=support
(1-4-4) Fast Read
0=not support 1=support
21
1b
(1-1-4) Fast Read
0=not support 1=support
22
1b
23
1b
33h
31:24
FFh
37h:34h
31:00
07FF FFFFh
0=not support 1=support
32h
Unused
Unused
Flash Memory Density
(1-4-4) Fast Read Number of Wait
states (Note3)
(1-4-4) Fast Read Number of
Mode Bits (Note4)
0 0000b: Not supported; 0 0100b: 4
0 0110b: 6; 0 1000b: 8
Mode Bits:
000b: Not supported; 010b: 2 bits
(1-4-4) Fast Read Opcode
(1-1-4) Fast Read Number of Wait
states
(1-1-4) Fast Read Number of
Mode Bits
39h
0 0000b: Not supported; 0 0100b: 4
0 0110b: 6; 0 1000b: 8
Mode Bits:
000b: Not supported; 010b: 2 bits
(1-1-4) Fast Read Opcode
P/N: PM1728
38h
3Ah
3Bh
Macronix Proprietary
75
04:00
0 0100b
07:05
010b
15:08
EBh
20:16
0 1000b
23:21
000b
31:24
6Bh
F1h
FFh
44h
EBh
08h
6Bh
Rev. 1.9, March 13, 2019
MX25U12835F
SFDP Table below is for MX25U12835FZNI-10G, MX25U12835FZ2I-10G, MX25U12835FZNI-08G,
MX25U12835FMI-10G and MX25U12835FM2I-10G
Description
Comment
(1-1-2) Fast Read Number of Wait
states
(1-1-2) Fast Read Number of
Mode Bits
0 0000b: Not supported; 0 0100b: 4
0 0110b: 6; 0 1000b: 8
Mode Bits:
000b: Not supported; 010b: 2 bits
(1-1-2) Fast Read Opcode
(1-2-2) Fast Read Number of Wait
states
(1-2-2) Fast Read Number of
Mode Bits
0 0000b: Not supported; 0 0100b: 4
0 0110b: 6; 0 1000b: 8
Mode Bits:
000b: Not supported; 010b: 2 bits
3Eh
3Fh
0=not support 1=support
Unused
(4-4-4) Fast Read
3Ch
3Dh
(1-2-2) Fast Read Opcode
(2-2-2) Fast Read
Add (h) DW Add Data (h/b)
(Byte)
(Bit)
(Note1)
0=not support 1=support
40h
Unused
04:00
0 1000b
07:05
000b
15:08
3Bh
20:16
0 0100b
23:21
000b
31:24
BBh
00
0b
03:01
111b
04
1b
07:05
111b
Data
(h)
08h
3Bh
04h
BBh
FEh
Unused
43h:41h
31:08
FFh
FFh
Unused
45h:44h
15:00
FFh
FFh
20:16
0 0000b
23:21
000b
47h
31:24
FFh
FFh
49h:48h
15:00
FFh
FFh
20:16
0 0100b
23:21
010b
4Bh
31:24
EBh
EBh
4Ch
07:00
0Ch
0Ch
4Dh
15:08
20h
20h
4Eh
23:16
0Fh
0Fh
4Fh
31:24
52h
52h
50h
07:00
10h
10h
51h
15:08
D8h
D8h
52h
23:16
00h
00h
53h
31:24
FFh
FFh
(2-2-2) Fast Read Number of Wait
states
(2-2-2) Fast Read Number of
Mode Bits
0 0000b: Not supported; 0 0100b: 4
0 0110b: 6; 0 1000b: 8
Mode Bits:
000b: Not supported; 010b: 2 bits
(2-2-2) Fast Read Opcode
Unused
(4-4-4) Fast Read Number of Wait
states
(4-4-4) Fast Read Number of
Mode Bits
0 0000b: Not supported; 0 0100b: 4
0 0110b: 6; 0 1000b: 8
Mode Bits:
000b: Not supported; 010b: 2 bits
(4-4-4) Fast Read Opcode
Sector Type 1 Size
Sector/block size = 2^N bytes (Note5)
0Ch: 4KB; 0Fh: 32KB; 10h: 64KB
Sector Type 1 erase Opcode
Sector Type 2 Size
Sector/block size = 2^N bytes
00h: N/A; 0Fh: 32KB; 10h: 64KB
Sector Type 2 erase Opcode
Sector Type 3 Size
Sector/block size = 2^N bytes
00h: N/A; 0Fh: 32KB; 10h: 64KB
Sector Type 3 erase Opcode
Sector Type 4 Size
00h: N/A, This sector type doesn't
exist
Sector Type 4 erase Opcode
P/N: PM1728
Macronix Proprietary
76
46h
4Ah
00h
44h
Rev. 1.9, March 13, 2019
MX25U12835F
Table 14. Parameter Table (1): Macronix Flash Parameter Tables
SFDP Table below is for MX25U12835FZNI-10G, MX25U12835FZ2I-10G, MX25U12835FZNI-08G,
MX25U12835FMI-10G and MX25U12835FM2I-10G
Description
Vcc Supply Maximum Voltage
Vcc Supply Minimum Voltage
Comment
2000h=2.000V
2700h=2.700V
3600h=3.600V
1650h=1.650V, 1750h=1.750V
2250h=2.250V, 2300h=2.300V
2350h=2.350V, 2650h=2.650V
2700h=2.700V
Add (h) DW Add Data (h/b)
(Byte)
(Bit)
(Note1)
Data
(h)
61h:60h
07:00
15:08
00h
20h
00h
20h
63h:62h
23:16
31:24
50h
16h
50h
16h
H/W Reset# pin
0=not support 1=support
00
1b
H/W Hold# pin
0=not support 1=support
01
0b
Deep Power Down Mode
0=not support 1=support
02
1b
S/W Reset
0=not support 1=support
03
1b
S/W Reset Opcode
Reset Enable (66h) should be
issued before Reset Opcode
Program Suspend/Resume
0=not support 1=support
12
1b
Erase Suspend/Resume
0=not support 1=support
13
1b
14
1b
15
1b
66h
23:16
C0h
C0h
67h
31:24
64h
64h
65h:64h
Unused
Wrap-Around Read mode
0=not support 1=support
Wrap-Around Read mode Opcode
11:04
1001 1001b
F99Dh
(99h)
Wrap-Around Read data length
08h:support 8B wrap-around read
16h:8B&16B
32h:8B&16B&32B
64h:8B&16B&32B&64B
Individual block lock
0=not support 1=support
00
1b
Individual block lock bit
(Volatile/Nonvolatile)
0=Volatile 1=Nonvolatile
01
0b
09:02
0011 0110b
(36h)
10
0b
11
1b
Individual block lock Opcode
Individual block lock Volatile
protect bit default protect status
0=protect 1=unprotect
Secured OTP
0=not support 1=support
Read Lock
0=not support 1=support
12
0b
Permanent Lock
0=not support 1=support
13
0b
Unused
15:14
11b
Unused
31:16
FFh
FFh
31:00
FFh
FFh
6Bh:68h
Unused
6Fh:6Ch
C8D9h
MX25U12835FZNI-10G-SFDP_2015-12-03,SF10
P/N: PM1728
Macronix Proprietary
77
Rev. 1.9, March 13, 2019
MX25U12835F
Note 1: h/b is hexadecimal or binary.
Note 2: (x-y-z) means I/O mode nomenclature used to indicate the number of active pins used for the opcode (x),
address (y), and data (z). At the present time, the only valid Read SFDP instruction modes are: (1-1-1),
(2-2-2), and (4-4-4)
Note 3: Wait States is required dummy clock cycles after the address bits or optional mode bits.
Note 4: Mode Bits is optional control bits that follow the address bits. These bits are driven by the system
controller if they are specified. (eg,read performance enhance toggling bits)
Note 5: 4KB=2^0Ch,32KB=2^0Fh,64KB=2^10h
Note 6: All unused and undefined area data is blank FFh for SFDP Tables that are defined in Parameter
Identification Header. All other areas beyond defined SFDP Table are reserved by Macronix.
P/N: PM1728
Macronix Proprietary
78
Rev. 1.9, March 13, 2019
MX25U12835F
10. RESET
Driving the RESET# pin low for a period of tRLRH or longer will reset the device. After reset cycle, the device is at
the following states:
- Standby mode
- All the volatile bits such as WEL/WIP/SRAM lock bit will return to the default status as power on.
If the device is under programming or erasing, driving the RESET# pin low will also terminate the operation and data
could be lost. During the resetting cycle, the SO data becomes high impedance and the current will be reduced to
minimum.
Figure 71. RESET Timing
CS#
tRHSL
SCLK
tRH tRS
RESET#
tRLRH
tREADY1 / tREADY2
Table 15-1. Reset Timing-(Power On)
Symbol Parameter
tRHSL Reset# high before CS# low
tRS
Reset# setup time
tRH
Reset# hold time
tRLRH Reset# low pulse width
tREADY1 Reset Recovery time
Min.
10
15
15
10
35
Typ.
Max.
Unit
us
ns
ns
us
us
Min.
10
15
15
10
40
40
310
12
25
100
40
Typ.
Max.
Unit
us
ns
ns
us
us
us
us
ms
ms
ms
ms
Table 15-2. Reset Timing-(Other Operation)
Symbol
tRHSL
tRS
tRH
tRLRH
Parameter
Reset# high before CS# low
Reset# setup time
Reset# hold time
Reset# low pulse width
Reset Recovery time (During instruction decoding)
Reset Recovery time (for read operation)
Reset Recovery time (for program operation)
tREADY2 Reset Recovery time(for SE operation)
Reset Recovery time (for BE64KB/BE32KB operation)
Reset Recovery time (for Chip Erase operation)
Reset Recovery time (for WRSR operation)
P/N: PM1728
Macronix Proprietary
79
Rev. 1.9, March 13, 2019
MX25U12835F
11. POWER-ON STATE
The device is at the following states after power-up:
- Standby mode (please note it is not deep power-down mode)
- Write Enable Latch (WEL) bit is reset
The device must not be selected during power-up and power-down stage until the VCC reaches the following levels:
- VCC minimum at power-up stage and then after a delay of tVSL
- GND at power-down
Please note that a pull-up resistor on CS# may ensure a safe and proper power-up/down level.
An internal power-on reset (POR) circuit may protect the device from data corruption and inadvertent data change
during power up state. When VCC is lower than VWI (POR threshold voltage value), the internal logic is reset and
the flash device has no response to any command.
For further protection on the device, if the VCC does not reach the VCC minimum level, the correct operation is not
guaranteed. The write, erase, and program command should be sent after the below time delay:
- tVSL after VCC reached VCC minimum level
The device can accept read command after VCC reached VCC minimum and a time delay of tVSL.
Please refer to the "Figure 79. Power-up Timing".
Note:
- To stabilize the VCC level, the VCC rail decoupled by a suitable capacitor close to package pins is recommended. (generally around 0.1uF)
- At power-down stage, the VCC drops below VWI level, all operations are disable and device has no response
to any command. The data corruption might occur during this stage if a write, program, erase cycle is in progress.
P/N: PM1728
Macronix Proprietary
80
Rev. 1.9, March 13, 2019
MX25U12835F
12. ELECTRICAL SPECIFICATIONS
Table 16. Absolute Maximum Ratings
Rating
Value
Ambient Operating Temperature
Industrial grade
-40°C to 85°C
Storage Temperature
-65°C to 150°C
Applied Input Voltage
-0.5V to VCC+0.5V
Applied Output Voltage
-0.5V to VCC+0.5V
VCC to Ground Potential
-0.5V to 2.5V
NOTICE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage
to the device. This is stress rating only and functional operational sections of this specification is not implied.
Exposure to absolute maximum rating conditions for extended period may affect reliability.
2. Specifications contained within the following tables are subject to change.
3. During voltage transitions, all pins may overshoot to VCC+1.0V or -1.0V for period up to 20ns.
Figure 73. Maximum Positive Overshoot Waveform
Figure 72. Maximum Negative Overshoot Waveform
20ns
0V
VCC+1.0V
-1.0V
2.0V
20ns
Table 17. Capacitance TA = 25°C, f = 1.0 MHz
Symbol Parameter
CIN
COUT
P/N: PM1728
Min.
Typ.
Max.
Unit
Input Capacitance
6
pF
VIN = 0V
Output Capacitance
8
pF
VOUT = 0V
Macronix Proprietary
81
Conditions
Rev. 1.9, March 13, 2019
MX25U12835F
Figure 74. Data Input Test Waveforms and Measurement Level
Input timing referance level
0.8VCC
Output timing referance level
0.7VCC
AC
Measurement
Level
0.3VCC
0.2VCC
0.5VCC
Note: Input pulse rise and fall time are
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