M50FW040
4-Mbit (512 Kb x8, uniform block)
3-V supply firmware hub Flash memory
Feature summary
■
Supply voltage
– VCC = 3 V to 3.6 V for Program, Erase and
Read operations
– VPP = 12V for fast Erase (optional)
■
Two interfaces
– Firmware hub (FWH) interface for
embedded operation with PC chipsets
– Address/Address Multiplexed (A/A Mux)
interface for programming equipment
compatibility
■
Firmware hub (FWH) hardware interface mode
– 5-signal communication interface
supporting Read and Write operations
– Hardware Write Protect pins for block
protection
– Register based Read and Write protection
– 5 additional general-purpose inputs for
platform design flexibility
– Synchronized with 33-MHz PCI clock
■
Programming time: 10 µs typical
■
8 uniform 64 Kbyte memory blocks
■
Program/Erase Controller
– Embedded Byte Program and Block Erase
algorithms
– Status Register bits
■
Program and Erase Suspend
– Read other blocks during Program/Erase
Suspend
– Program other blocks during Erase
Suspend
■
For use in PC Bios applications
■
Electronic signature
– Manufacturer code: 20h
– Device code: 2Ch
October 2006
PLCC32 (K)
TSOP32 (NB)
8 × 14mm
TSOP40 (N)
10 × 20mm
■
Rev 9
Packages
– ECOPACK® (RoHS compliant)
1/53
www.st.com
1
Contents
M50FW040
Contents
1
Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2
Signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1
2.2
2.3
3
2.1.1
Input/Output communications (FWH0-FWH3) . . . . . . . . . . . . . . . . . . . . 12
2.1.2
Input communication frame (FWH4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.3
Identification inputs (ID0-ID3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.4
General-purpose inputs (FGPI0-FGPI4) . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.5
Interface configuration (IC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.6
Interface Reset (RP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.7
CPU Reset (INIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.8
Clock (CLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.9
Top Block Lock (TBL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.10
Write Protect (WP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1.11
Reserved for future use (RFU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Address/Address multiplexed (A/A Mux) signal descriptions . . . . . . . . . . 14
2.2.1
Address inputs (A0-A10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.2
Data Inputs/Outputs (DQ0-DQ7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.3
Output Enable (G) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.4
Write Enable (W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.5
Row/Column Address Select (RC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.6
Ready/Busy Output (RB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Supply signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1
VCC supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.2
VPP optional supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.3
VSS ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Bus operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1
2/53
Firmware hub (FWH) signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . 12
Firmware hub (FWH) bus operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1.1
Bus Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1.2
Bus Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1.3
Bus Abort . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1.4
Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1.5
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
M50FW040
Contents
3.1.6
3.2
4
5
6
Block Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Address/Address multiplexed (A/A Mux) bus operations . . . . . . . . . . . . . 19
3.2.1
Bus Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2.2
Bus Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2.3
Output Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2.4
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Command interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1
Read Memory Array command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2
Read Status Register command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3
Read Electronic Signature command . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.4
Program command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5
Erase command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.6
Clear Status Register command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.7
Program/Erase Suspend command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.8
Program/Erase Resume command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.0.1
Program/Erase Controller status (Bit 7) . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.0.2
Erase Suspend status (Bit 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.0.3
Erase status (Bit 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.0.4
Program status (Bit 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.0.5
VPP status (Bit 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.0.6
Program Suspend status (Bit 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.0.7
Block Protection status (Bit 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.0.8
Reserved (Bit 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Firmware hub (FWH) interface Configuration Registers . . . . . . . . . . . 30
6.1
Lock Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.1.1
Write Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.1.2
Read Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.1.3
Lock Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.2
Firmware Hub (FWH) General-Purpose Input Register . . . . . . . . . . . . . . 31
6.3
Manufacturer Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.4
Device Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.5
Firmware Hub (FWH) General-Purpose Input Register . . . . . . . . . . . . . . 31
3/53
Contents
M50FW040
6.6
Manufacturer Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.7
Device Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7
Program and Erase times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10
Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
11
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
12
Flowcharts and pseudo codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4/53
M50FW040
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Table 28.
Signal names (FWH interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Signal names (A/A Mux interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Block addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
FWH bus Read field definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
FWH bus Write field definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Read electronic signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Status Register bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Firmware hub Configuration Register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Lock Register bit definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
General-Purpose Input Register definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Program and Erase times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
FWH interface AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
A/A Mux interface AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
FWH interface clock characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
FWH interface AC signal timing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Reset AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A/A Mux interface read AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
A/A Mux interface Write AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
PLCC32 – 32 pin Rectangular Plastic Leaded Chip Carrier, package
mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
TSOP32 – 32 lead Plastic Thin Small Outline, 8x14 mm, package
mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
TSOP40 – 40 lead Plastic Thin Small Outline, 10x20 mm, package
mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
5/53
List of figures
M50FW040
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
6/53
Logic diagram (FWH interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Logic diagram (A/A Mux Interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PLCC connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TSOP32 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TSOP40 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
FWH Bus Read waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
FWH Bus Write waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
FWH interface AC testing input output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
A/A Mux interface AC testing input output waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
FWH interface clock waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
FWH interface AC signal timing waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Reset AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A/A Mux interface Read AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
A/A Mux interface Write AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
PLCC32 – 32 pin Rectangular Plastic Leaded Chip Carrier, package outline . . . . . . . . . . 44
TSOP32 – 32 lead Plastic Thin Small Outline, 8x14 mm, package outline . . . . . . . . . . . . 45
TSOP40 – 40 lead Plastic Thin Small Outline, 10x20 mm, package outline . . . . . . . . . . . 46
Program flowchart and pseudo code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Program Suspend & Resume flowchart and pseudo code . . . . . . . . . . . . . . . . . . . . . . . . . 49
Erase flowchart and pseudo code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Erase Suspend & Resume flowchart and pseudo code . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
M50FW040
1
Summary description
Summary description
The M50FW040 is a 4 Mbit (512Kb x8) non-volatile memory that can be read, erased and
reprogrammed. These operations can be performed using a single low voltage (3.0 to 3.6V)
supply. For fast erasing in production lines an optional 12V power supply can be used to
reduce the erasing time.
The memory is divided into blocks that can be erased independently so it is possible to
preserve valid data while old data is erased. Blocks can be protected individually to prevent
accidental Program or Erase commands from modifying the memory. Program and Erase
commands are written to the Command Interface of the memory. An on-chip Program/Erase
Controller simplifies the process of programming or erasing the memory by taking care of all
of the special operations that are required to update the memory contents. The end of a
program or erase operation can be detected and any error conditions identified. The
command set required to control the memory is consistent with JEDEC standards.
Two different bus interfaces are supported by the memory. The primary interface, the
Firmware Hub (or FWH) Interface, uses Intel’s proprietary FWH protocol. This has been
designed to remove the need for the ISA bus in current PC Chipsets; the M50FW040 acts
as the PC BIOS on the Low Pin Count bus for these PC Chipsets.
The secondary interface, the Address/Address Multiplexed (or A/A Mux) Interface, is
designed to be compatible with current Flash Programmers for production line programming
prior to fitting to a PC Motherboard.
The memory is offered in TSOP32 (8 x 14mm), TSOP40 (10 x 20mm) and PLCC32
packages and it is supplied with all the bits erased (set to ’1’).
In order to meet environmental requirements, ST offers the M50FW040 in ECOPACK®
packages. ECOPACK® packages are Lead-free and RoHS compliant. ECOPACK is an ST
trademark. ECOPACK specifications are available at: www.st.com.
7/53
Summary description
Figure 1.
M50FW040
Logic diagram (FWH interface)
VCC VPP
4
4
FWH0FWH3
ID0-ID3
5
FGPI0FGPI4
FWH4
WP
M50FW040
TBL
CLK
IC
RP
INIT
VSS
AI03623
Table 1.
8/53
Signal names (FWH interface)
FWH0-FWH3
Input/Output Communications
FWH4
Input Communication Frame
ID0-ID3
Identification Inputs
FGPI0-FGPI4
General Purpose Inputs
IC
Interface Configuration
RP
Interface Reset
INIT
CPU Reset
CLK
Clock
TBL
Top Block Lock
WP
Write Protect
RFU
Reserved for Future Use. Leave disconnected
VCC
Supply Voltage
VPP
Optional Supply Voltage for Fast Erase Operations
VSS
Ground
NC
Not Connected Internally
M50FW040
Summary description
Figure 2.
Logic diagram (A/A Mux Interface)
VCC VPP
11
8
DQ0-DQ7
A0-A10
RC
IC
M50FW040
RB
G
W
RP
VSS
AI10719
Table 2.
Signal names (A/A Mux interface)
IC
Interface Configuration
A0-A10
Address Inputs
DQ0-DQ7
Data Inputs/Outputs
G
Output Enable
W
Write Enable
RC
Row/Column Address Select
RB
Ready/Busy Output
RP
Interface Reset
VCC
Supply Voltage
VPP
Optional Supply Voltage for Fast Program and Erase Operations
VSS
Ground
NC
Not Connected Internally
9/53
Summary description
PLCC connections
A8
A9
RP
VPP
VCC
RC
A10
Figure 3.
M50FW040
A/A Mux
FGPI2
FGPI3
RP
VPP
VCC
CLK
FGPI4
A/A Mux
1 32
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
FGPI1
FGPI0
WP
TBL
ID3
ID2
ID1
ID0
FWH0
9
M50FW040
25
IC (VIL)
NC
NC
VSS
VCC
INIT
FWH4
RFU
RFU
IC (VIH)
NC
NC
VSS
VCC
G
W
RB
DQ7
DQ1
DQ2
VSS
DQ3
DQ4
DQ5
DQ6
FWH1
FWH2
VSS
FWH3
RFU
RFU
RFU
17
A/A Mux
A/A Mux
AI03616
1. Pins 27 and 28 are not internally connected.
Figure 4.
TSOP32 connections
A10
RC
VCC
VPP
RP
A9
A8
A7
A6
A5
A4
NC
NC
NC
VSS
IC
GPI4
CLK
VCC
VPP
RP
GPI3
GPI2
GPI1
GPI0
WP
TBL
1
8
9
16
M50FW040
32
INIT
FWH4/LFRAME
NC
RFU
RFU
RFU
RFU
G
W
NC
DQ7
DQ6
DQ5
DQ4
25
24
FWH3/LAD3
VSS
FWH2/LAD2
FWH1/LAD1
FWH0/LAD0
ID0
ID1
ID2
ID3/RFU
DQ3
VSS
DQ2
DQ1
DQ0
A0
A1
A2
A3
17
A/A Mux
A/A Mux
NC
NC
NC
NC
IC (VIH)
AI10718
1. the RB pin is not available for the A/A Mux interface in the TSOP32 package.
10/53
M50FW040
Summary description
Figure 5.
TSOP40 connections
A/A Mux
NC
IC (VIL)
NC
NC
NC
NC
FGPI4
NC
CLK
VCC
VPP
RP
NC
NC
FGPI3
FGPI2
FGPI1
FGPI0
WP
TBL
1
10
11
20
40
M50FW040
31
30
21
VSS
VCC
FWH4
INIT
RFU
RFU
RFU
RFU
RFU
VCC
VSS
VSS
FWH3
FWH2
FWH1
FWH0
ID0
ID1
ID2
ID3
VSS
VCC
W
G
RB
DQ7
DQ6
DQ5
DQ4
VCC
VSS
VSS
DQ3
DQ2
DQ1
DQ0
A0
A1
A2
A3
A/A Mux
NC
IC (VIH)
NC
NC
NC
NC
A10
NC
RC
VCC
VPP
RP
NC
NC
A9
A8
A7
A6
A5
A4
AI03617
11/53
Signal descriptions
2
M50FW040
Signal descriptions
There are two different bus interfaces available on this part. The active interface is selected
before power-up or during Reset using the Interface Configuration Pin, IC.
The signals for each interface are discussed in the Firmware hub (FWH) signal descriptions
section and the Address/Address multiplexed (A/A Mux) signal descriptions section below.
The supply signals are discussed in the Supply signal descriptions section below.
2.1
Firmware hub (FWH) signal descriptions
For the Firmware Hub (FWH) Interface see Figure 1., Logic diagram (FWH
interface), and Table 1., Signal names (FWH interface).
2.1.1
Input/Output communications (FWH0-FWH3)
All Input and Output Communication with the memory take place on these pins. Addresses
and Data for Bus Read and Bus Write operations are encoded on these pins.
2.1.2
Input communication frame (FWH4)
The Input Communication Frame (FWH4) signals the start of a bus operation. When Input
Communication Frame is Low, VIL, on the rising edge of the Clock a new bus operation is
initiated. If Input Communication Frame is Low, VIL, during a bus operation then the
operation is aborted. When Input Communication Frame is High, VIH, the current bus
operation is proceeding or the bus is idle.
2.1.3
Identification inputs (ID0-ID3)
The Identification Inputs select the address that the memory responds to. Up to 16
memories can be addressed on a bus. For an address bit to be ‘0’ the pin can be left floating
or driven Low, VIL; an internal pull-down resistor is included with a value of RIL. For an
address bit to be ‘1’ the pin must be driven High, VIH; there will be a leakage current of ILI2
through each pin when pulled to VIH; see Table 18.
By convention the boot memory must have address ‘0000’ and all additional memories take
sequential addresses starting from ‘0001’.
2.1.4
General-purpose inputs (FGPI0-FGPI4)
The General Purpose Inputs can be used as digital inputs for the CPU to read. The General
Purpose Inputs Register holds the values on these pins. The pins must have stable data
from before the start of the cycle that reads the General Purpose Input Register until after
the cycle is complete. These pins must not be left to float, they should be driven Low, VIL, or
High, VIH.
12/53
M50FW040
2.1.5
Signal descriptions
Interface configuration (IC)
The Interface Configuration input selects whether the Firmware Hub (FWH) or the
Address/Address Multiplexed (A/A Mux) Interface is used. The chosen interface must be
selected before power-up or during a Reset and, thereafter, cannot be changed. The state
of the Interface Configuration, IC, should not be changed during operation.
To select the Firmware Hub (FWH) Interface the Interface Configuration pin should be left to
float or driven Low, VIL; to select the Address/Address Multiplexed (A/A Mux) Interface the
pin should be driven High, VIH. An internal pull-down resistor is included with a value of RIL;
there will be a leakage current of ILI2 through each pin when pulled to VIH; see Table
18.
2.1.6
Interface Reset (RP)
The Interface Reset (RP) input is used to reset the memory. When Interface Reset (RP) is
set Low, VIL, the memory is in Reset mode: the outputs are put to high impedance and the
current consumption is minimized. When RP is set High, VIH, the memory is in normal
operation. After exiting Reset mode, the memory enters Read mode.
2.1.7
CPU Reset (INIT)
The CPU Reset, INIT, pin is used to Reset the memory when the CPU is reset. It behaves
identically to Interface Reset, RP, and the internal Reset line is the logical OR (electrical
AND) of RP and INIT.
2.1.8
Clock (CLK)
The Clock, CLK, input is used to clock the signals in and out of the Input/Output
Communication Pins, FWH0-FWH3. The Clock conforms to the PCI specification.
2.1.9
Top Block Lock (TBL)
The Top Block Lock input is used to prevent the Top Block (Block 7) from being changed.
When Top Block Lock, TBL, is set Low, VIL, Program and Erase operations in the Top Block
have no effect, regardless of the state of the Lock Register. When Top Block Lock, TBL, is
set High, VIH, the protection of the Block is determined by the Lock Register. The state of
Top Block Lock, TBL, does not affect the protection of the Main Blocks (Blocks 0 to 6).
Top Block Lock, TBL, must be set prior to a Program or Erase operation is initiated and must
not be changed until the operation completes or unpredictable results may occur. Care
should be taken to avoid unpredictable behavior by changing TBL during Program or Erase
Suspend.
13/53
Signal descriptions
2.1.10
M50FW040
Write Protect (WP)
The Write Protect input is used to prevent the Main Blocks (Blocks 0 to 6) from being
changed. When Write Protect, WP, is set Low, VIL, Program and Erase operations in the
Main Blocks have no effect, regardless of the state of the Lock Register. When Write
Protect, WP, is set High, VIH, the protection of the Block determined by the Lock Register.
The state of Write Protect, WP, does not affect the protection of the Top Block (Block 7).
Write Protect, WP, must be set prior to a Program or Erase operation is initiated and must
not be changed until the operation completes or unpredictable results may occur. Care
should be taken to avoid unpredictable behavior by changing WP during Program or Erase
Suspend.
2.1.11
Reserved for future use (RFU)
These pins do not have assigned functions in this revision of the part. They must be left
disconnected.
2.2
Address/Address multiplexed (A/A Mux) signal descriptions
For the Address/Address Multiplexed (A/A Mux) Interface see Figure 1., Logic
diagram (FWH interface), and Table 1., Signal names (FWH interface).
2.2.1
Address inputs (A0-A10)
The Address Inputs are used to set the Row Address bits (A0-A10) and the Column
Address bits (A11-A18). They are latched during any bus operation by the Row/Column
Address Select input, RC.
2.2.2
Data Inputs/Outputs (DQ0-DQ7)
The Data Inputs/Outputs hold the data that is written to or read from the memory. They
output the data stored at the selected address during a Bus Read operation. During Bus
Write operations they represent the commands sent to the Command Interface of the
internal state machine. The Data Inputs/Outputs, DQ0-DQ7, are latched during a Bus Write
operation.
2.2.3
Output Enable (G)
The Output Enable, G, controls the Bus Read operation of the memory.
2.2.4
Write Enable (W)
The Write Enable, W, controls the Bus Write operation of the memory’s Command Interface.
2.2.5
Row/Column Address Select (RC)
The Row/Column Address Select input selects whether the Address Inputs should be
latched into the Row Address bits (A0-A10) or the Column Address bits (A11-A18). The
Row Address bits are latched on the falling edge of RC whereas the Column Address bits
are latched on the rising edge.
14/53
M50FW040
2.2.6
Signal descriptions
Ready/Busy Output (RB)
The Ready/Busy pin gives the status of the memory’s Program/Erase Controller. When
Ready/Busy is Low, VOL, the memory is busy with a Program or Erase operation and it will
not accept any additional Program or Erase command except the Program/Erase Suspend
command. When Ready/Busy is High, VOH, the memory is ready for any Read, Program or
Erase operation.
2.3
Supply signal descriptions
The Supply Signals are the same for both interfaces.
2.3.1
VCC supply voltage
The VCC Supply Voltage supplies the power for all operations (Read, Program, Erase etc.).
The Command Interface is disabled when the VCC Supply Voltage is less than the Lockout
Voltage, VLKO. This prevents Bus Write operations from accidentally damaging the data
during power up, power down and power surges. If the Program/Erase Controller is
programming or erasing during this time then the operation aborts and the memory contents
being altered will be invalid. After VCC becomes valid the Command Interface is reset to
Read mode.
A 0.1µF capacitor should be connected between the VCC Supply Voltage pins and the VSS
Ground pin to decouple the current surges from the power supply. Both VCC Supply Voltage
pins must be connected to the power supply. The PCB track widths must be sufficient to
carry the currents required during program and erase operations.
2.3.2
VPP optional supply voltage
The VPP Optional Supply Voltage pin is used to select the Fast Erase option of the memory
and to protect the memory. When VPP < VPPLK Program and Erase operations cannot be
performed and an error is reported in the Status Register if an attempt to change the
memory contents is made. When VPP = VCC Program and Erase operations take place as
normal. When VPP = VPPH Fast Erase operations are used. Any other voltage input to VPP
will result in undefined behavior and should not be used.
VPP should not be set to VPPH for more than 80 hours during the life of the memory.
2.3.3
VSS ground
VSS is the reference for all the voltage measurements.
15/53
Signal descriptions
Table 3.
16/53
M50FW040
Block addresses
Size
(Kbytes)
Address Range
Block Number
Block Type
64
70000h-7FFFFh
7
Top Block
64
60000h-6FFFFh
6
Main Block
64
50000h-5FFFFh
5
Main Block
64
40000h-4FFFFh
4
Main Block
64
30000h-3FFFFh
3
Main Block
64
20000h-2FFFFh
2
Main Block
64
10000h-1FFFFh
1
Main Block
64
00000h-0FFFFh
0
Main Block
M50FW040
3
Bus operations
Bus operations
The two interfaces have similar bus operations but the signals and timings are completely
different. The Firmware Hub (FWH) Interface is the usual interface and all of the functionality
of the part is available through this interface. Only a subset of functions are available
through the Address/Address Multiplexed (A/A Mux) Interface.
Follow the section Firmware hub (FWH) bus operations below and the section
Address/Address multiplexed (A/A Mux) bus operations below for a description of the bus
operations on each interface.
3.1
Firmware hub (FWH) bus operations
The Firmware Hub (FWH) Interface consists of four data signals (FWH0-FWH3), one control
line (FWH4) and a clock (CLK). In addition protection against accidental or malicious data
corruption can be achieved using two further signals (TBL and WP). Finally two reset
signals (RP and INIT) are available to put the memory into a known state.
The data signals, control signal and clock are designed to be compatible with PCI electrical
specifications. The interface operates with clock speeds up to 33MHz.
The following operations can be performed using the appropriate bus cycles: Bus Read, Bus
Write, Standby, Reset and Block Protection.
3.1.1
Bus Read
Bus Read operations read from the memory cells, specific registers in the Command
Interface or Firmware Hub Registers. A valid Bus Read operation starts when Input
Communication Frame, FWH4, is Low, VIL, as Clock rises and the correct Start cycle is on
FWH0-FWH3. On the following clock cycles the Host will send the Memory ID Select,
Address and other control bits on FWH0-FWH3. The memory responds by outputting Sync
data until the wait-states have elapsed followed by Data0-Data3 and Data4-Data7.
Refer to Table 4: FWH bus Read field definitions, and Figure 6: FWH Bus Read waveforms,
for a description of the Field definitions for each clock cycle of the transfer. See Table 20:
FWH interface AC signal timing characteristics, and Figure 11: FWH interface AC signal
timing waveforms, for details on the timings of the signals.
3.1.2
Bus Write
Bus Write operations write to the Command Interface or Firmware Hub Registers. A valid
Bus Write operation starts when Input Communication Frame, FWH4, is Low, VIL, as Clock
rises and the correct Start cycle is on FWH0-FWH3. On the following Clock cycles the Host
will send the Memory ID Select, Address, other control bits, Data0-Data3 and Data4-Data7
on FWH0-FWH3. The memory outputs Sync data until the wait-states have elapsed.
Refer to Table 5: FWH bus Write field definitions, and Figure 7: FWH Bus Write waveforms,
for a description of the Field definitions for each clock cycle of the transfer. See Table 20:
FWH interface AC signal timing characteristics, and Figure 11: FWH interface AC signal
timing waveforms, for details on the timings of the signals.
17/53
Bus operations
3.1.3
M50FW040
Bus Abort
The Bus Abort operation can be used to immediately abort the current bus operation. A Bus
Abort occurs when FWH4 is driven Low, VIL, during the bus operation; the memory will tristate the Input/Output Communication pins, FWH0-FWH3.
Note that, during a Bus Write operation, the Command Interface starts executing the
command as soon as the data is fully received; a Bus Abort during the final TAR cycles is
not guaranteed to abort the command; the bus, however, will be released immediately.
3.1.4
Standby
When FWH4 is High, VIH, the memory is put into Standby mode where FWH0-FWH3 are
put into a high-impedance state and the Supply Current is reduced to the Standby level,
ICC1.
3.1.5
Reset
During Reset mode all internal circuits are switched off, the memory is deselected and the
outputs are put in high-impedance. The memory is in Reset mode when Interface Reset, RP,
or CPU Reset, INIT, is Low, VIL. RP or INIT must be held Low, VIL, for tPLPH. The memory
resets to Read mode upon return from Reset mode and the Lock Registers return to their
default states regardless of their state before Reset, see Table 10 If RP or INIT goes Low,
VIL, during a Program or Erase operation, the operation is aborted and the memory cells
affected no longer contain valid data; the memory can take up to tPLRH to abort a Program
or Erase operation.
3.1.6
Block Protection
Block Protection can be forced using the signals Top Block Lock, TBL, and Write Protect,
WP, regardless of the state of the Lock Registers.
18/53
M50FW040
3.2
Bus operations
Address/Address multiplexed (A/A Mux) bus operations
The Address/Address Multiplexed (A/A Mux) Interface has a more traditional style interface.
The signals consist of a multiplexed address signals (A0-A10), data signals, (DQ0-DQ7) and
three control signals (RC, G, W). An additional signal, RP, can be used to reset the memory.
The Address/Address Multiplexed (A/A Mux) Interface is included for use by Flash
Programming equipment for faster factory programming. Only a subset of the features
available to the Firmware Hub (FWH) Interface are available; these include all the
Commands but exclude the Security features and other registers.
The following operations can be performed using the appropriate bus cycles: Bus Read, Bus
Write, Output Disable and Reset.
When the Address/Address Multiplexed (A/A Mux) Interface is selected all the blocks are
unprotected. It is not possible to protect any blocks through this interface.
3.2.1
Bus Read
Bus Read operations are used to output the contents of the Memory Array, the Electronic
Signature and the Status Register. A valid Bus Read operation begins by latching the Row
Address and Column Address signals into the memory using the Address Inputs, A0-A10,
and the Row/Column Address Select RC. Then Write Enable (W) and Interface Reset (RP)
must be High, VIH, and Output Enable, G, Low, VIL, in order to perform a Bus Read
operation. The Data Inputs/Outputs will output the value, see Figure 13, and Table 22: A/A
Mux interface read AC characteristics, for details of when the output becomes valid.
3.2.2
Bus Write
Bus Write operations write to the Command Interface. A valid Bus Write operation begins by
latching the Row Address and Column Address signals into the memory using the Address
Inputs, A0-A10, and the Row/Column Address Select RC. The data should be set up on the
Data Inputs/Outputs; Output Enable, G, and Interface Reset, RP, must be High, VIH and
Write Enable, W, must be Low, VIL. The Data Inputs/Outputs are latched on the rising edge
of Write Enable, W. See Figure 14: A/A Mux interface Write AC waveforms, and Table 23:
A/A Mux interface Write AC characteristics, for details of the timing requirements.
3.2.3
Output Disable
The data outputs are high-impedance when the Output Enable, G, is at VIH.
3.2.4
Reset
During Reset mode all internal circuits are switched off, the memory is deselected and the
outputs are put in high-impedance. The memory is in Reset mode when RP is Low, VIL. RP
must be held Low, VIL for tPLPH. If RP is goes Low, VIL, during a Program or Erase operation,
the operation is aborted and the memory cells affected no longer contain valid data; the
memory can take up to tPLRH to abort a Program or Erase operation.
19/53
Bus operations
M50FW040
Table 4.
FWH bus Read field definitions
Clock Clock
Cycle
Cycle
Number Count
1
1
Field
FWH0- Memory
FWH3
I/O
START 1101b
Description
I
On the rising edge of CLK with FWH4 Low, the
contents of FWH0-FWH3 indicate the start of a FWH
Read cycle.
2
1
IDSEL
XXXX
I
Indicates which FWH Flash Memory is selected. The
value on FWH0-FWH3 is compared to the IDSEL
strapping on the FWH Flash Memory pins to select
which FWH Flash Memory is being addressed.
3-9
7
ADDR
XXXX
I
A 28-bit address phase is transferred starting with
the most significant nibble first.
10
1
MSIZE
0000b
I
Always 0000b (only single byte transfers are
supported).
11
1
TAR
1111b
I
The host drives FWH0-FWH3 to 1111b to indicate a
turnaround cycle.
12
1
TAR
1111b
(float)
O
The FWH Flash Memory takes control of FWH0FWH3 during this cycle.
13-14
2
WSYN
C
0101b
O
The FWH Flash Memory drives FWH0-FWH3 to
0101b (short wait-sync) for two clock cycles,
indicating that the data is not yet available. Two waitstates are always included.
15
1
RSYN
C
0000b
O
The FWH Flash Memory drives FWH0-FWH3 to
0000b, indicating that data will be available during
the next clock cycle.
16-17
2
DATA
XXXX
O
Data transfer is two CLK cycles, starting with the
least significant nibble.
18
1
TAR
1111b
O
The FWH Flash Memory drives FWH0-FWH3 to
1111b to indicate a turnaround cycle.
19
1
TAR
1111b
(float)
N/A
Figure 6.
The FWH Flash Memory floats its outputs, the host
takes control of FWH0-FWH3.
FWH Bus Read waveforms
CLK
FWH4
FWH0-FWH3
Number of
clock cycles
START
IDSEL
ADDR
MSIZE
TAR
SYNC
DATA
TAR
1
1
7
1
2
3
2
2
AI03437
20/53
M50FW040
Bus operations
Table 5.
FWH bus Write field definitions
Clock Clock
Cycle
Cycle
Number Count
1
1
Field
FWH0FWH3
Memory
I/O
START
1110b
I
On the rising edge of CLK with FWH4 Low, the
contents of FWH0-FWH3 indicate the start of a
FWH Write Cycle.
Description
2
1
IDSEL
XXXX
I
Indicates which FWH Flash Memory is selected.
The value on FWH0-FWH3 is compared to the
IDSEL strapping on the FWH Flash Memory pins to
select which FWH Flash Memory is being
addressed.
3-9
7
ADDR
XXXX
I
A 28-bit address phase is transferred starting with
the most significant nibble first.
10
1
MSIZE
0000b
I
Always 0000b (single byte transfer).
11-12
2
DATA
XXXX
I
Data transfer is two cycles, starting with the least
significant nibble.
13
1
TAR
1111b
I
The host drives FWH0-FWH3 to 1111b to indicate
a turnaround cycle.
14
1
TAR
1111b
(float)
O
The FWH Flash Memory takes control of FWH0FWH3 during this cycle.
15
1
SYNC
0000b
O
The FWH Flash Memory drives FWH0-FWH3 to
0000b, indicating it has received data or a
command.
16
1
TAR
1111b
O
The FWH Flash Memory drives FWH0-FWH3 to
1111b, indicating a turnaround cycle.
17
1
TAR
1111b
(float)
N/A
Figure 7.
The FWH Flash Memory floats its outputs and the
host takes control of FWH0-FWH3.
FWH Bus Write waveforms
CLK
FWH4
FWH0-FWH3
Number of
clock cycles
START
IDSEL
ADDR
MSIZE
DATA
TAR
SYNC
TAR
1
1
7
1
2
2
1
2
AI03441
21/53
Command interface
4
M50FW040
Command interface
All Bus Write operations to the memory are interpreted by the Command Interface.
Commands consist of one or more sequential Bus Write operations.
After power-up or a Reset operation the memory enters Read mode.
The commands are summarized in Table 7: Commands. Refer to Table 7 in conjunction with
the text descriptions below.
4.1
Read Memory Array command
The Read Memory Array command returns the memory to its Read mode where it behaves
like a ROM or EPROM. One Bus Write cycle is required to issue the Read Memory Array
command and return the memory to Read mode. Once the command is issued the memory
remains in Read mode until another command is issued. From Read mode Bus Read
operations will access the memory array.
While the Program/Erase Controller is executing a Program or Erase operation the memory
will not accept the Read Memory Array command until the operation completes.
4.2
Read Status Register command
The Read Status Register command is used to read the Status Register. One Bus Write
cycle is required to issue the Read Status Register command. Once the command is issued
subsequent Bus Read operations read the Status Register until another command is issued.
See the section on the Status Register for details on the definitions of the Status Register
bits.
4.3
Read Electronic Signature command
The Read Electronic Signature command is used to read the Manufacturer Code and the
Device Code. One Bus Write cycle is required to issue the Read Electronic Signature
command. Once the command is issued subsequent Bus Read operations read the
Manufacturer Code or the Device Code until another command is issued.
After the Read Electronic Signature Command is issued the Manufacturer Code and Device
Code can be read using Bus Read operations using the addresses in Table 6.
22/53
M50FW040
4.4
Command interface
Program command
The Program command can be used to program a value to one address in the memory array
at a time. Two Bus Write operations are required to issue the command; the second Bus
Write cycle latches the address and data in the internal state machine and starts the
Program/Erase Controller. Once the command is issued subsequent Bus Read operations
read the Status Register. See the section on the Status Register for details on the definitions
of the Status Register bits.
If the address falls in a protected block then the Program operation will abort, the data in the
memory array will not be changed and the Status Register will output the error.
During the Program operation the memory will only accept the Read Status Register
command and the Program/Erase Suspend command. All other commands will be ignored.
Typical Program times are given in Table 12.
Note that the Program command cannot change a bit set at ‘0’ back to ‘1’ and attempting to
do so will not cause any modification on its value. The Erase command must be used to set
all of the bits in the block to ‘1’.
See Figure 18: Program flowchart and pseudo code, for a suggested flowchart on using the
Program command.
4.5
Erase command
The Erase command can be used to erase a block. Two Bus Write operations are required
to issue the command; the second Bus Write cycle latches the block address in the internal
state machine and starts the Program/Erase Controller. Once the command is issued
subsequent Bus Read operations read the Status Register. See the section on the Status
Register for details on the definitions of the Status Register bits.
If the block is protected then the Erase operation will abort, the data in the block will not be
changed and the Status Register will output the error.
During the Erase operation the memory will only accept the Read Status Register command
and the Program/Erase Suspend command. All other commands will be ignored. Typical
Erase times are given in Table 12.
The Erase command sets all of the bits in the block to ‘1’. All previous data in the block is
lost.
See Figure 20: Erase flowchart and pseudo code, for a suggested flowchart on using the
Erase command.
4.6
Clear Status Register command
The Clear Status Register command can be used to reset bits 1, 3, 4 and 5 in the Status
Register to ‘0’. One Bus Write is required to issue the Clear Status Register command.
Once the command is issued the memory returns to its previous mode, subsequent Bus
Read operations continue to output the same data.
The bits in the Status Register are sticky and do not automatically return to ‘0’ when a new
Program or Erase command is issued. If an error occurs then it is essential to clear any error
bits in the Status Register by issuing the Clear Status Register command before attempting
a new Program or Erase command.
23/53
Command interface
4.7
M50FW040
Program/Erase Suspend command
The Program/Erase Suspend command can be used to pause a Program or Erase operation.
One Bus Write cycle is required to issue the Program/Erase Suspend command and pause
the Program/Erase Controller. Once the command is issued it is necessary to poll the
Program/Erase Controller Status bit to find out when the Program/Erase Controller has
paused; no other commands will be accepted until the Program/Erase Controller has
paused. After the Program/Erase Controller has paused, the memory will continue to output
the Status Register until another command is issued.
During the polling period between issuing the Program/Erase Suspend command and the
Program/Erase Controller pausing it is possible for the operation to complete. Once
Program/Erase Controller Status bit indicates that the Program/Erase Controller is no longer
active, the Program Suspend Status bit or the Erase Suspend Status bit can be used to
determine if the operation has completed or is suspended. For timing on the delay between
issuing the Program/Erase Suspend command and the Program/Erase Controller pausing
see Table 12.
During Program/Erase Suspend the Read Memory Array, Read Status Register, Read
Electronic Signature and Program/Erase Resume commands will be accepted by the
Command Interface. Additionally, if the suspended operation was Erase then the Program
command will also be accepted; only the blocks not being erased may be read or
programmed correctly.
See Figure 19: Program Suspend & Resume flowchart and pseudo code, and Figure 21:
Erase Suspend & Resume flowchart and pseudo code, for suggested flowcharts on using
the Program/Erase Suspend command.
4.8
Program/Erase Resume command
The Program/Erase Resume command can be used to restart the Program/Erase Controller
after a Program/Erase Suspend operation has paused it. One Bus Write cycle is required to
issue the Program/Erase Resume command. Once the command is issued subsequent Bus
Read operations read the Status Register.
Table 6.
Read electronic signature
Code
24/53
Address
Data
Manufacturer code
00000h
20h
Device code
00001h
2Ch
M50FW040
Command interface
Commands(1)
Table 7.
Cycles
Bus Write operations
Command
Read Memory
Array(2)
Read Status Register(3)
Read Electronic Signature(4)
Program(5)
Erase(5)
(6)
1st
2nd
Address
Data
Address
Data
1
X
FFh
1
X
70h
1
X
90h
1
X
98h
2
X
40h
PA
PD
2
X
10h
PA
PD
2
X
20h
BA
D0h
1
X
50h
Suspend(7)
1
X
B0h
Program/Erase Resume(8)
1
X
D0h
1
X
00h
1
X
01h
1
X
60h
1
X
2Fh
1
X
C0h
Clear Status Register
Program/Erase
(9)
Invalid/Reserved
1. X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block.
2. Read Memory Array. After a Read Memory Array command, read the memory as normal until another
command is issued.
3. Read Status Register. After a Read Status Register command, read the Status Register as normal until
another command is issued.
4. Read Electronic Signature. After a Read Electronic Signature command, read Manufacturer Code,
Device Code until another command is issued.
5. Erase, Program. After these commands read the Status Register until the command completes and
another command is issued.
6. Clear Status Register. After the Clear Status Register command bits 1, 3, 4 and 5 in the Status Register
are reset to ‘0’
7. Program/Erase Suspend. After the Program/Erase Suspend command has been accepted, issue Read
Memory Array, Read Status Register, Program (during Erase suspend) and Program/Erase resume
commands.
8. Program/Erase Resume. After the Program/Erase Resume command the suspended Program/Erase
operation resumes, read the Status Register until the Program/Erase Controller completes and the
memory returns to Read Mode.
9. Invalid/Reserved. Do not use Invalid or Reserved commands.
25/53
Status Register
5
M50FW040
Status Register
The Status Register provides information on the current or previous Program or Erase
operation. Different bits in the Status Register convey different information and errors on the
operation.
To read the Status Register the Read Status Register command can be issued. The Status
Register is automatically read after Program, Erase and Program/Erase Resume
commands are issued. The Status Register can be read from any address.
The Status Register bits are summarized in Status Register bits. Refer to Table 8 in
conjunction with the text descriptions below.
5.0.1
Program/Erase Controller status (Bit 7)
The Program/Erase Controller Status bit indicates whether the Program/Erase Controller is
active or inactive. When the Program/Erase Controller Status bit is ‘0’, the Program/Erase
Controller is active; when the bit is ‘1’, the Program/Erase Controller is inactive.
The Program/Erase Controller Status is ‘0’ immediately after a Program/Erase Suspend
command is issued until the Program/Erase Controller pauses. After the Program/Erase
Controller pauses the bit is ‘1’.
During Program and Erase operation the Program/Erase Controller Status bit can be polled
to find the end of the operation. The other bits in the Status Register should not be tested
until the Program/Erase Controller completes the operation and the bit is ‘1’.
After the Program/Erase Controller completes its operation the Erase Status, Program
Status, VPP Status and Block Protection Status bits should be tested for errors.
5.0.2
Erase Suspend status (Bit 6)
The Erase Suspend Status bit indicates that an Erase operation has been suspended and is
waiting to be resumed. The Erase Suspend Status should only be considered valid when the
Program/Erase Controller Status bit is ‘1’ (Program/Erase Controller inactive); after a
Program/Erase Suspend command is issued the memory may still complete the operation
rather than entering the Suspend mode.
When the Erase Suspend Status bit is ‘0’ the Program/Erase Controller is active or has
completed its operation; when the bit is ‘1’ a Program/Erase Suspend command has been
issued and the memory is waiting for a Program/Erase Resume command.
When a Program/Erase Resume command is issued the Erase Suspend Status bit returns
to ‘0’.
26/53
M50FW040
5.0.3
Status Register
Erase status (Bit 5)
The Erase Status bit can be used to identify if the memory has applied the maximum
number of erase pulses to the block and still failed to verify that the block has erased
correctly. The Erase Status bit should be read once the Program/Erase Controller Status bit
is ‘1’ (Program/Erase Controller inactive).
When the Erase Status bit is ‘0’ the memory has successfully verified that the block has
erased correctly; when the Erase Status bit is ‘1’ the Program/Erase Controller has applied
the maximum number of pulses to the block and still failed to verify that the block has erased
correctly.
Once the Erase Status bit is set to ‘1’ the it can only be reset to ‘0’ by a Clear Status
Register command or a hardware reset. If it is set to ‘1’ it should be reset before a new
Program or Erase command is issued, otherwise the new command will appear to fail.
5.0.4
Program status (Bit 4)
The Program Status bit can be used to identify if the memory has applied the maximum
number of program pulses to the byte and still failed to verify that the byte has programmed
correctly. The Program Status bit should be read once the Program/Erase Controller Status
bit is ‘1’ (Program/Erase Controller inactive).
When the Program Status bit is ‘0’ the memory has successfully verified that the byte has
programmed correctly; when the Program Status bit is ‘1’ the Program/Erase Controller has
applied the maximum number of pulses to the byte and still failed to verify that the byte has
programmed correctly.
Once the Program Status bit is set to ‘1’ it can only be reset to ‘0’ by a Clear Status Register
command or a hardware reset. If it is set to ‘1’ it should be reset before a new Program or
Erase command is issued, otherwise the new command will appear to fail.
5.0.5
VPP status (Bit 3)
The VPP Status bit can be used to identify an invalid voltage on the VPP pin during Program
and Erase operations. The VPP pin is only sampled at the beginning of a Program or Erase
operation. Indeterminate results can occur if VPP becomes invalid during a Program or
Erase operation.
When the VPP Status bit is ‘0’ the voltage on the VPP pin was sampled at a valid voltage;
when the VPP Status bit is ‘1’ the VPP pin has a voltage that is below the VPP Lockout
Voltage, VPPLK, the memory is protected; Program and Erase operation cannot be
performed.
Once the VPP Status bit set to ‘1’ it can only be reset to ‘0’ by a Clear Status Register
command or a hardware reset. If it is set to ‘1’ it should be reset before a new Program or
Erase command is issued, otherwise the new command will appear to fail.
27/53
Status Register
5.0.6
M50FW040
Program Suspend status (Bit 2)
The Program Suspend Status bit indicates that a Program operation has been suspended
and is waiting to be resumed. The Program Suspend Status should only be considered valid
when the Program/Erase Controller Status bit is ‘1’ (Program/Erase Controller inactive);
after a Program/Erase Suspend command is issued the memory may still complete the
operation rather than entering the Suspend mode.
When the Program Suspend Status bit is ‘0’ the Program/Erase Controller is active or has
completed its operation; when the bit is ‘1’ a Program/Erase Suspend command has been
issued and the memory is waiting for a Program/Erase Resume command.
When a Program/Erase Resume command is issued the Program Suspend Status bit
returns to ‘0’.
5.0.7
Block Protection status (Bit 1)
The Block Protection Status bit can be used to identify if the Program or Erase operation has
tried to modify the contents of a protected block. When the Block Protection Status bit is to
‘0’ no Program or Erase operations have been attempted to protected blocks since the last
Clear Status Register command or hardware reset; when the Block Protection Status bit is
‘1’ a Program or Erase operation has been attempted on a protected block.
Once it is set to ‘1’ the Block Protection Status bit can only be reset to ‘0’ by a Clear Status
Register command or a hardware reset. If it is set to ‘1’ it should be reset before a new
Program or Erase command is issued, otherwise the new command will appear to fail.
Using the A/A Mux Interface the Block Protection Status bit is always ‘0’.
5.0.8
Reserved (Bit 0)
Bit 0 of the Status Register is reserved. Its value should be masked.
28/53
M50FW040
Status Register
Table 8.
Status Register bits
Operation
Program active
Program suspended
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
‘0’
X(1)
‘0’
‘0’
‘0’
‘0’
‘0’
‘1
(1)
‘0’
‘0’
‘0’
‘1’
‘0’
(1)
X
Program completed successfully
‘1’
X
‘0’
‘0’
‘0’
‘0’
‘0’
Program failure due to VPP Error
‘1’
X(1)
‘0’
‘0’
‘1’
‘0’
‘0’
Program failure due to Block Protection (FWH
Interface only)
‘1’
X(1)
‘0’
‘0’
‘0’
‘0’
‘1’
Program failure due to cell failure
‘1’
X(1)
‘0’
‘1’
‘0’
‘0’
‘0’
Erase active
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
Erase suspended
‘1’
‘1’
‘0’
‘0’
‘0’
‘0’
‘0’
Erase completed successfully
‘1’
‘0’
‘0’
‘0’
‘0’
‘0’
‘0’
Erase failure due to VPP Error
‘1’
‘0’
‘0’
‘0’
‘1’
‘0’
‘0’
Erase failure due to Block Protection (FWH
Interface only)
‘1’
‘0’
‘0’
‘0’
‘0’
‘0’
‘1’
Erase failure due to failed cell(s) in block
‘1’
‘0’
‘1’
‘0’
‘0’
‘0’
‘0’
1. For Program operations during Erase Suspend Bit 6 is ‘1’, otherwise Bit 6 is ‘0’.
29/53
Firmware hub (FWH) interface Configuration Registers
6
M50FW040
Firmware hub (FWH) interface Configuration
Registers
When the Firmware Hub Interface is selected several additional registers can be accessed.
These registers control the protection status of the Blocks, read the General Purpose Input
pins and identify the memory using the Electronic Signature codes. See Table 9 for the
memory map of the Configuration Registers.
6.1
Lock Registers
The Lock Registers control the protection status of the Blocks. Each Block has its own Lock
Register. Three bits within each Lock Register control the protection of each block, the Write
Lock Bit, the Read Lock Bit and the Lock Down Bit.
The Lock Registers can be read and written, though care should be taken when writing as,
once the Lock Down Bit is set, ‘1’, further modifications to the Lock Register cannot be made
until cleared, to ‘0’, by a reset or power-up.
See Table 10 for details on the bit definitions of the Lock Registers.
6.1.1
Write Lock
The Write Lock Bit determines whether the contents of the Block can be modified (using the
Program or Erase Command). When the Write Lock Bit is set, ‘1’, the block is write
protected; any operations that attempt to change the data in the block will fail and the Status
Register will report the error. When the Write Lock Bit is reset, ‘0’, the block is not write
protected through the Lock Register and may be modified unless write protected through
some other means.
When VPP is less than VPPLK all blocks are protected and cannot be modified, regardless of
the state of the Write Lock Bit. If Top Block Lock, TBL, is Low, VIL, then the Top Block (Block
7) is write protected and cannot be modified. Similarly, if Write Protect, WP, is Low, VIL, then
the Main Blocks (Blocks 0 to 6) are write protected and cannot be modified.
After power-up or reset the Write Lock Bit is always set to ‘1’ (write protected).
6.1.2
Read Lock
The Read Lock bit determines whether the contents of the Block can be read (from Read
mode). When the Read Lock Bit is set, ‘1’, the block is read protected; any operation that
attempts to read the contents of the block will read 00h instead. When the Read Lock Bit is
reset, ‘0’, read operations in the Block return the data programmed into the block as
expected.
After power-up or reset the Read Lock Bit is always reset to ‘0’ (not read protected).
30/53
M50FW040
6.1.3
Firmware hub (FWH) interface Configuration Registers
Lock Down
The Lock Down Bit provides a mechanism for protecting software data from simple hacking
and malicious attack. When the Lock Down Bit is set, ‘1’, further modification to the Write
Lock, Read Lock and Lock Down Bits cannot be performed. A reset or power-up is required
before changes to these bits can be made. When the Lock Down Bit is reset, ‘0’, the Write
Lock, Read Lock and Lock Down Bits can be changed.
6.2
Firmware Hub (FWH) General-Purpose Input Register
The Firmware Hub (FWH) General Purpose Input Register holds the state of the Firmware
Hub Interface General Purpose Input pins, FGPI0-FGPI4. When this register is read, the
state of these pins is returned. This register is read-only and writing to it has no effect.
The signals on the Firmware Hub Interface General Purpose Input pins should remain
constant throughout the whole Bus Read cycle in order to guarantee that the correct data is
read.
6.3
Manufacturer Code Register
Reading the Manufacturer Code Register returns the manufacturer code for the memory.
The manufacturer code for STMicroelectronics is 20h. This register is read-only and writing
to it has no effect.
6.4
Device Code Register
Reading the Device Code Register returns the device code for the memory, 2Ch. This
register is read-only and writing to it has no effect.
6.5
Firmware Hub (FWH) General-Purpose Input Register
The Firmware Hub (FWH) General Purpose Input Register holds the state of the Firmware
Hub Interface General Purpose Input pins, FGPI0-FGPI4. When this register is read, the
state of these pins is returned. This register is read-only and writing to it has no effect.
The signals on the Firmware Hub Interface General Purpose Input pins should remain
constant throughout the whole Bus Read cycle in order to guarantee that the correct data is
read.
6.6
Manufacturer Code Register
Reading the Manufacturer Code Register returns the manufacturer code for the memory.
The manufacturer code for STMicroelectronics is 20h. This register is read-only and writing
to it has no effect.
31/53
Firmware hub (FWH) interface Configuration Registers
6.7
M50FW040
Device Code Register
Reading the Device Code Register returns the device code for the memory, 2Ch. This
register is read-only and writing to it has no effect.
Table 9.
Firmware hub Configuration Register map
Memory
Address
Default
Value
Access
Top Block Lock Register (Block 7)
FBF0002h
01h
R/W
T_MINUS01_LK
Top Block [-1] Lock Register (Block 6)
FBE0002h
01h
R/W
T_MINUS02_LK
Top Block [-2] Lock Register (Block 5)
FBD0002h
01h
R/W
T_MINUS03_LK
Top Block [-3] Lock Register (Block 4)
FBC0002h
01h
R/W
T_MINUS04_LK
Top Block [-4] Lock Register (Block 3)
FBB0002h
01h
R/W
T_MINUS05_LK
Top Block [-5] Lock Register (Block 2)
FBA0002h
01h
R/W
T_MINUS06_LK
Top Block [-6] Lock Register (Block 1)
FB90002h
01h
R/W
T_MINUS07_LK
Top Block [-7] Lock Register (Block 0)
FB80002h
01h
R/W
Firmware Hub (FWH) General Purpose Input
Register
FBC0100h
N/A
R
Manufacturer Code Register
FBC0000h
20h
R
Device Code Register
FBC0001h
2Ch
R
Mnemonic
T_BLOCK_LK
FGPI_REG
MANUF_REG
DEV_REG
Table 10.
Bit
Register Name
Lock Register bit definitions(1)
Bit name
Value
7-3
2
1
0
Function
Reserved
ReadLock
‘1’
Bus Read operations in this Block always return 00h.
‘0’
Bus read operations in this Block return the Memory Array contents.
(Default value).
‘1’
Changes to the Read-Lock bit and the Write-Lock bit cannot be
performed. Once a ‘1’ is written to the Lock-Down bit it cannot be cleared
to ‘0’; the bit is always reset to ‘0’ following a Reset (using RP or INIT) or
after power-up.
‘0’
Read-Lock and Write-Lock can be changed by writing new values to
them. (Default value).
‘1’
Program and Erase operations in this Block will set an error in the Status
Register. The memory contents will not be changed. (Default value).
‘0’
Program and Erase operations in this Block are executed and will modify
the Block contents.
LockDown
WriteLock
1. Applies to Top Block Lock Register (T_BLOCK_LK) and Top Block [-1] Lock Register (T_MINUS01_LK) to
Top Block [-7] Lock Register (T_MINUS07_LK).
32/53
M50FW040
Firmware hub (FWH) interface Configuration Registers
Table 11.
Bit
General-Purpose Input Register definition(1)
Bit Name
Value
7-5
4
3
2
1
0
Function
Reserved
‘1’
Input Pin FGPI4 is at VIH
‘0’
Input Pin FGPI4 is at VIL
‘1’
Input Pin FGPI3 is at VIH
‘0’
Input Pin FGPI3 is at VIL
‘1’
Input Pin FGPI2 is at VIH
‘0’
Input Pin FGPI2 is at VIL
‘1’
Input Pin FGPI1 is at VIH
‘0’
Input Pin FGPI1 is at VIL
‘1’
Input Pin FGPI0 is at VIH
‘0’
Input Pin FGPI0 is at VIL
FGPI4
FGPI3
FGPI2
FGPI1
FGPI0
1. Applies to the General Purpose Inputs Register (FGPI-REG).
33/53
Program and Erase times
7
M50FW040
Program and Erase times
The Program and Erase times are shown in Table 12.
Table 12.
Program and Erase times
Typ(1)
Max
Unit
Byte Program
10
200
µs
Block Program
0.4
5
s
VPP = 12V ± 5%
0.75
8
s
VPP = VCC
1
10
s
Program/Erase Suspend to Program
pause(2)
5
µs
Program/Erase Suspend to Block Erase
pause(2)
30
µs
Parameter
Block Erase
1. TA = 25°C, VCC = 3.3 V.
2. Sampled only, not 100% tested.
34/53
Test Condition
Min
M50FW040
8
Maximum rating
Maximum rating
Stressing the device above the rating listed in the Absolute Maximum Ratings table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
Program and other relevant quality documents.
Table 13.
Absolute maximum ratings
Symbol
Parameter
Min
Max
Unit
TSTG
Storage Temperature
–65
150
°C
VIO (1)
Input or Output Voltage
–0.6
VCC + 0.6
V
VCC
Supply Voltage
–0.6
4
V
VPP
Program Voltage
–0.6
13
V
1. Minimum Voltage may undershoot to –2V and for less than 20ns during transitions. Maximum Voltage may
overshoot to VCC + 2V and for less than 20ns during transitions.
35/53
DC and AC parameters
9
M50FW040
DC and AC parameters
This section summarizes the operating measurement conditions, and the DC and AC
characteristics of the device. The parameters in the DC and AC characteristics Tables that
follow, are derived from tests performed under the Measurement Conditions summarized in
Table 14, Table 15 and Table 16. Designers should check that the operating conditions in
their circuit match the operating conditions when relying on the quoted parameters.
Table 14.
Operating conditions
Symbol
TA
VCC
Table 15.
Parameter
Ambient Operating Temperature (Device Grade 5)
Min
Max
Unit
–20
85
°C
3
3.6
V
Supply Voltage
FWH interface AC measurement conditions
Parameter
Value
Unit
10
pF
≤1.4
ns
0.2 VCC and 0.6 VCC
V
0.4 VCC
V
Load Capacitance (CL)
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
Table 16.
A/A Mux interface AC measurement conditions
Parameter
Value
Unit
Load Capacitance (CL)
30
pF
Input Rise and Fall Times
≤10
ns
0 to 3
V
1.5
V
Input Pulse Voltages
Input and Output Timing Ref. Voltages
Figure 8.
FWH interface AC testing input output waveforms
0.6 VCC
0.4 VCC
0.2 VCC
Input and Output AC Testing Waveform
IO < ILO
IO > ILO
IO < ILO
Output AC Tri-state Testing Waveform
AI03404
36/53
M50FW040
DC and AC parameters
Figure 9.
A/A Mux interface AC testing input output waveform
3V
1.5V
0V
AI01417
Table 17.
Impedance(1)
Symbol
Parameter
Test Condition
CIN(2)
Input Capacitance
VIN = 0V
CCLK(2)
Clock Capacitance
VIN = 0V
LPIN(3)
Recommended pin inductance
Min
3
Max
Unit
13
pF
12
pF
20
nH
1. TA = 25 °C, f = 1 MHz).
2. Sampled only, not 100% tested.
3. See PCI Specification.
37/53
DC and AC parameters
Table 18.
Symbol
38/53
M50FW040
DC characteristics
Parameter
VIH
Input High Voltage
VIL
Input Low Voltage
Interface
Test Condition
Min
Max
Unit
FWH
0.5 VCC
VCC + 0.5
V
A/A Mux
0.7 VCC
VCC + 0.3
V
FWH
–0.5
0.3 VCC
V
A/A Mux
-0.5
0.8
V
VIH(INIT)
INIT Input High
Voltage
FWH
1.35
VCC + 0.5
V
VIL(INIT)
INIT Input Low
Voltage
FWH
–0.5
0.2 VCC
V
ILI(2)
Input Leakage
Current
0V ≤VIN ≤VCC
±10
µA
ILI2
IC, IDx Input
Leakage Current
IC, ID0, ID1, ID2, ID3 = VCC
200
µA
RIL
IC, IDx Input Pull
Low Resistor
100
kΩ
VOH
Output High
Voltage
VOL
Output Low Voltage
ILO
Output Leakage
Current
20
FWH
IOH = –500µA
0.9 VCC
V
A/A Mux
IOH = –100µA
VCC – 0.4
V
FWH
IOL = 1.5mA
0.1 VCC
V
A/A Mux
IOL = 1.8mA
0.45
V
0V ≤VOUT ≤VCC
±10
µA
VPP1
VPP Voltage
3
3.6
V
VPPH
VPP Voltage
(Fast Erase)
11.4
12.6
V
VPPLK(1)
VPP Lockout
Voltage
1.5
VLKO(1)
VCC Lockout
Voltage
1.8
V
2.3
V
FWH
FWH4 = 0.9 VCC, VPP = VCC
All other inputs 0.9 VCC to
0.1 VCC
VCC = 3.6V, f(CLK) = 33MHz
100
µA
10
mA
ICC1
Supply Current
(Standby)
ICC2
Supply Current
(Standby)
FWH
FWH4 = 0.1 VCC, VPP = VCC
All other inputs 0.9 VCC to
0.1 VCC
VCC = 3.6V, f(CLK) = 33MHz
ICC3
Supply Current
(Any internal
operation active)
FWH
VCC = VCC max, VPP = VCC
f(CLK) = 33MHz
IOUT = 0mA
60
mA
ICC4
Supply Current
(Read)
A/A Mux
G = VIH, f = 6MHz
20
mA
M50FW040
DC and AC parameters
Table 18.
DC characteristics (continued)
Symbol
ICC5(1)
Parameter
Supply Current
(Program/Erase)
Interface
Test Condition
A/A Mux
Min
Max
Unit
Program/Erase Controller
Active
20
mA
IPP
VPP Supply Current
(Read/Standby)
VPP > VCC
400
µA
VPP Supply Current
(Program/Erase
active)
VPP = VCC
40
mA
IPP1(1)
VPP = 12V ± 5%
15
mA
1. Sampled only, not 100% tested.
2. Input leakage currents include High-Z output leakage for all bidirectional buffers with tri-state outputs.
Figure 10. FWH interface clock waveform
tCYC
tHIGH
tLOW
0.6 VCC
0.5 VCC
0.4 VCC, p-to-p
(minimum)
0.4 VCC
0.3 VCC
0.2 VCC
AI03403
Table 19.
Symbol
FWH interface clock characteristics
Parameter
Test Condition
Value
Unit
tCYC
CLK Cycle Time(1)
Min
30
ns
tHIGH
CLK High Time
Min
11
ns
tLOW
CLK Low Time
Min
11
ns
Min
1
V/ns
Max
4
V/ns
CLK Slew Rate
peak to peak
1. Devices on the PCI Bus must work with any clock frequency between DC and 33MHz. Below 16MHz
devices may be guaranteed by design rather than tested. Refer to PCI Specification.
39/53
DC and AC parameters
M50FW040
Figure 11. FWH interface AC signal timing waveforms
CLK
tCHQV
tCHQZ
tDVCH
tCHQX
tCHDX
FWH0-FWH3
VALID
VALID OUTPUT DATA
FLOAT OUTPUT DATA
VALID INPUT DATA
AI03405
Table 20.
FWH interface AC signal timing characteristics
Symbol
PCI Symbol
Parameter
tCHQV
tval
CLK to Data Out
tCHQX(1)
ton
tCHQZ
Test Condition
Value
Unit
Min
2
ns
Max
11
ns
CLK to Active (Float to Active Delay)
Min
2
ns
toff
CLK to Inactive (Active to Float Delay)
Max
28
ns
tAVCH
tDVCH
tsu
Input Set-up Time(2)
Min
7
ns
tCHAX
tCHDX
th
Input Hold Time(2)
Min
0
ns
1. The timing measurements for Active/Float transitions are defined when the current through the pin equals the leakage
current specification.
2. Applies to all inputs except CLK.
40/53
M50FW040
DC and AC parameters
Figure 12. Reset AC waveforms
RP, INIT
tPHWL, tPHGL, tPHFL
tPLPH
W, G, FWH4
tPLRH
RB
AI03420
Table 21.
Symbol
Reset AC characteristics
Parameter
tPLPH
RP or INIT Reset Pulse Width
tPLRH
RP or INIT Low to Reset
RP or INIT Slew
Rate(1)
tPHFL
RP or INIT High to FWH4 Low
tPHWL
tPHGL
RP High to Write Enable or
Output Enable Low
Test Condition
Value
Unit
Min
100
ns
Program/Erase Inactive
Max
100
ns
Program/Erase Active
Max
30
µs
Rising edge only
Min
50
mV/ns
FWH Interface only
Min
30
µs
A/A Mux Interface only
Min
50
µs
1. See Chapter 4 of the PCI Specification.
41/53
DC and AC parameters
M50FW040
Figure 13. A/A Mux interface Read AC waveforms
tAVAV
ROW ADDR VALID
A0-A10
NEXT ADDR VALID
COLUMN ADDR VALID
tAVCL
tAVCH
tCLAX
tCHAX
RC
tCHQV
G
tGLQV
tGHQZ
tGLQX
tGHQX
VALID
DQ0DQ7
W
tPHAV
RP
AI03406
Table 22.
Symbol
A/A Mux interface read AC characteristics
Parameter
Test Condition
Value
Unit
tAVAV
Read Cycle Time
Min
250
ns
tAVCL
Row Address Valid to RC Low
Min
50
ns
tCLAX
RC Low to Row Address Transition
Min
50
ns
tAVCH
Column Address Valid to RC high
Min
50
ns
tCHAX
RC High to Column Address
Transition
Min
50
ns
tCHQV(1) RC High to Output Valid
Max
150
ns
tGLQV(1)
Output Enable Low to Output Valid
Max
50
ns
tPHAV
RP High to Row Address Valid
Min
1
µs
tGLQX
Output Enable Low to Output
Transition
Min
0
ns
tGHQZ
Output Enable High to Output Hi-Z
Max
50
ns
tGHQX
Output Hold from Output Enable
High
Min
0
ns
1. G may be delayed up to tCHQV – tGLQV after the rising edge of RC without impact on tCHQV.
42/53
M50FW040
DC and AC parameters
Figure 14. A/A Mux interface Write AC waveforms
Write erase or
program setup
A0-A10
Write erase confirm or
valid address and data
C1
R2
tCLAX
tAVCH
R1
tAVCL
Automated erase
or program delay
Read Status
Register Data
Ready to write
another command
C2
tCHAX
RC
tWHWL
tWLWH
tCHWH
W
tVPHWH
tWHGL
G
tWHRL
RB
tQVVPL
VPP
tDVWH
DIN1
DQ0-DQ7
tWHDX
DIN2
VALID SRD
AI04185
Table 23.
A/A Mux interface Write AC characteristics
Symbol
Parameter
Test Condition
Value
Unit
tWLWH
Write Enable Low to Write Enable High
Min
100
ns
tDVWH
Data Valid to Write Enable High
Min
50
ns
tWHDX
Write Enable High to Data Transition
Min
5
ns
tAVCL
Row Address Valid to RC Low
Min
50
ns
tCLAX
RC Low to Row Address Transition
Min
50
ns
tAVCH
Column Address Valid to RC High
Min
50
ns
tCHAX
RC High to Column Address Transition
Min
50
ns
tWHWL
Write Enable High to Write Enable Low
Min
100
ns
tCHWH
RC High to Write Enable High
Min
50
ns
tVPHWH(1)
VPP High to Write Enable High
Min
100
ns
tWHGL
Write Enable High to Output Enable Low
Min
30
ns
tWHRL
Write Enable High to RB Low
Min
0
ns
Output Valid, RB High to VPP Low
Min
0
ns
tQVVPL
(1)(2)
1. Sampled only, not 100% tested.
2. Applicable if VPP is seen as a logic input (VPP < 3.6V).
43/53
Package mechanical
10
M50FW040
Package mechanical
Figure 15. PLCC32 – 32 pin Rectangular Plastic Leaded Chip Carrier, package
outline
D
D1
A1
A2
1 N
B1
E2
e
E1 E
E3
F
B
0.51 (.020)
E2
1.14 (.045)
A
D3
R
D2
CP
D2
PLCC-A
1. Drawing is not to scale.
Table 24.
PLCC32 – 32 pin Rectangular Plastic Leaded Chip Carrier, package
mechanical data
millimeters
inches
Symbol
Typ
Min
Max
A
3.17
A1
Min
Max
3.56
0.125
0.140
1.53
2.41
0.060
0.095
A2
0.38
–
0.015
–
B
0.33
0.53
0.013
0.021
B1
0.66
0.81
0.026
0.032
D
12.32
12.57
0.485
0.495
D1
11.35
11.51
0.447
0.453
D2
4.78
5.66
0.188
0.223
–
–
–
–
E
14.86
15.11
0.585
0.595
E1
13.89
14.05
0.547
0.553
E2
6.05
6.93
0.238
0.273
CP
D3
0.10
7.62
0.004
0.300
E3
10.16
–
–
0.400
–
–
e
1.27
–
–
0.050
–
–
0.00
0.13
0.000
0.005
–
–
–
–
F
R
N
44/53
Typ
0.89
32
0.035
32
M50FW040
Package mechanical
Figure 16. TSOP32 – 32 lead Plastic Thin Small Outline, 8x14 mm, package outline
A2
N
1
e
E
B
N/2
A
D1
CP
D
DIE
C
A1
TSOP-a
α
L
1. Drawing is not to scale.
Table 25.
TSOP32 – 32 lead Plastic Thin Small Outline, 8x14 mm, package
mechanical data
millimeters
inches
Symbol
Typ
Min
A
Max
Typ
Min
1.200
Max
0.0472
A1
0.050
0.150
0.0020
0.0059
A2
0.950
1.050
0.0374
0.0413
α
0°
5°
0°
5°
B
0.170
0.270
0.0067
0.0106
C
0.100
0.210
0.0039
0.0083
CP
0.100
0.0039
D
13.800
14.200
0.5433
0.5591
D1
12.300
12.500
0.4843
0.4921
–
–
–
–
E
7.900
8.100
0.3110
0.3189
L
0.500
0.700
0.0197
0.0276
N
32
e
0.500
0.0197
32
45/53
Package mechanical
M50FW040
Figure 17. TSOP40 – 40 lead Plastic Thin Small Outline, 10x20 mm, package outline
A2
N
1
e
E
B
N/2
A
D1
CP
D
DIE
C
A1
TSOP-a
α
L
1. Drawing is not to scale.
Table 26.
TSOP40 – 40 lead Plastic Thin Small Outline, 10x20 mm, package
mechanical data
millimeters
inches
Symbol
Typ
Min
A
Typ
Min
1.200
Max
0.0472
A1
0.050
0.150
0.0020
0.0059
A2
0.950
1.050
0.0374
0.0413
B
0.170
0.270
0.0067
0.0106
C
0.100
0.210
0.0039
0.0083
CP
0.100
0.0039
D
19.800
20.200
0.7795
0.7953
D1
18.300
18.500
0.7205
0.7283
–
–
–
–
E
9.900
10.100
0.3898
0.3976
L
0.500
0.700
0.0197
0.0276
α
0°
5°
0°
5°
N
40
e
46/53
Max
0.500
0.0197
40
M50FW040
11
Part numbering
Part numbering
Table 27.
Ordering information scheme
Example:
M50FW040
K
5
T
G
Device Type
M50
Architecture
F = Firmware Hub Interface
Operating Voltage
W = 3V to 3.6V
Device Function
040 = 4 Mbit (x8), Uniform Block
Package
K = PLCC32
NB = TSOP32 (8 x 14mm)(1)
N = TSOP40: 10 x 20 mm(1)
Device Grade
5 = Temperature range –20 to 85 °C.
Device tested with standard test flow
Option
blank = Standard Packing
T = Tape & Reel Packing
Plating Technology
P or G = ECOPACK® (RoHs compliant)
1. Devices delivered in this package are Not Recommended for New Design.
Devices are shipped from the factory with the memory content bits erased to ’1’.
For a list of available options (Speed, Package, etc.) or for further information on any aspect
of this device, please contact the ST Sales Office nearest to you.
The category of second-Level Interconnect is marked on the package and on the inner box
label, in compliance with JEDEC Standard JESD97. The maximum ratings related to
soldering conditions are also marked on the inner box label.
47/53
Flowcharts and pseudo codes
12
M50FW040
Flowcharts and pseudo codes
Figure 18. Program flowchart and pseudo code
Start
Program command:
– write 40h or 10h
– write Address & Data
(memory enters read status state after
the Program command)
Write 40h or 10h
Write Address
& Data
do:
–read Status Register if Program/Erase
Suspend command given execute
suspend program loop
NO
Read Status
Register
Suspend
b7 = 1
NO
YES
Suspend
Loop
while b7 = 1
YES
b3 = 0
NO
VPP Invalid
Error (1, 2)
If b3 = 1, VPP invalid error:
– error handler
NO
Program
Error (1, 2)
If b4 = 1, Program error:
– error handler
NO
Program to Protected
Block Error (1, 2)
YES
b4 = 0
YES
FWH
Interface
Only
b1 = 0
If b1 = 1, Program to protected block error:
– error handler
YES
End
AI03407
1. A Status check of b1 (Protected Block), b3 (VPP invalid) and b4 (Program Error) can be made after each
Program operation by following the correct command sequence.
2. If an error is found, the Status Register must be cleared before further Program/Erase Controller
operations.
48/53
M50FW040
Flowcharts and pseudo codes
Figure 19. Program Suspend & Resume flowchart and pseudo code
Start
Write B0h
Program/Erase Suspend command:
– write B0h
– write 70h
Write 70h
do:
– read Status Register
Read Status
Register
b7 = 1
NO
while b7 = 1
YES
b2 = 1
NO
Program Complete
If b2 = 0 Program completed
YES
Write a read
Command
Read data from
another address
Write D0h
Write FFh
Program Continues
Read Data
Program/Erase Resume command:
– write D0h to resume the program
– if the Program operation completed
then this is not necessary.
The device returns to Read as
normal (as if the Program/Erase
suspend was not issued).
AI03408
49/53
Flowcharts and pseudo codes
M50FW040
Figure 20. Erase flowchart and pseudo code
Start
Erase command:
– write 20h
– write Block Address & D0h
(memory enters read Status Register after
the Erase command)
Write 20h
Write Block Address
& D0h
Read Status
Register
Suspend
b7 = 1
do:
– read Status Register
– if Program/Erase Suspend command
given execute suspend erase loop
NO
NO
YES
Suspend
Loop
while b7 = 1
YES
b3 = 0
NO
VPP Invalid
Error (1)
NO
Command
Sequence Error (1)
If b3 = 1, VPP invalid error:
– error handler
YES
b4, b5 = 0
If b4, b5 = 1, Command sequence error:
– error handler
YES
b5 = 0
NO
Erase Error (1)
If b5 = 1, Erase error:
– error handler
YES
FWH
Interface
Only
b1 = 0
NO
Erase to Protected
Block Error (1)
If b1 = 1, Erase to protected block error:
– error handler
YES
End
AI03409
1. If an error is found, the Status Register must be cleared before further Program/Erase Controller
operations.
50/53
M50FW040
Flowcharts and pseudo codes
Figure 21. Erase Suspend & Resume flowchart and pseudo code
Start
Write B0h
Program/Erase Suspend command:
– write B0h
– write 70h
Write 70h
do:
– read Status Register
Read Status
Register
b7 = 1
NO
while b7 = 1
YES
b6 = 1
NO
Erase Complete
If b6 = 0, Erase completed
YES
Read data from
another block
or
Program
Write D0h
Write FFh
Erase Continues
Read Data
Program/Erase Resume command:
– write D0h to resume erase
– if the Erase operation completed
then this is not necessary.
The device returns to Read as
normal (as if the Program/Erase
suspend was not issued).
AI03410
51/53
Revision history
13
M50FW040
Revision history
Table 28.
Document revision history
Date
Version
September 2000
-01
First Issue
04-Oct-2000
-02
DC Characteristics: ICC4 changed
11-Apr-01
-03
Document type: from Preliminary Data to Data Sheet
Program and Erase functions clarification
Read Electronic Signature table change
FWH Register Configuration Map table change
Input Register Definition table, note clarification
DC Characteristics parameters clarification and new VIH and VIL
parameters added
FWH Interface AC Signal Timing Characteristics change
A/A Mux Interface Read AC Characteristics change
A/A Mux Interface Write AC Characteristics change
A/A Mux Interface Write AC Waveforms change
06-Jul-2001
-04
Note 2 changed (Table 13: Absolute maximum ratings)
12-Mar-2002
-05
RFU pins must be left disconnected
Specification of PLCC32 package mechanical data revised
09-Jul-2004
6.0
Revision numbering modified.
Document imported in new template (and so reformatted).
Temperature Range ordering information replaced by Device Grade,
Standard packing option added and Plating Technology added to
Table 27: Ordering information scheme. TLEAD parameter added to
Table 13: Absolute maximum ratings and TBIAS parameter removed.
12-Jul-2004
7.0
Inches values corrected in Table 27: Ordering information scheme.
10-Nov-2004
8.0
TSOP32 package added. Figure 2: Logic diagram (A/A Mux Interface)
and Table 2: Signal names (A/A Mux interface) added.
9
Document converted to new ST template.
Packages are ECOPACK® compliant. TLEAD removed from Table 13:
Absolute maximum ratings.
Device grade 1 removed. Blank Plating Technology option removed
from Table 27: Ordering information scheme.
24-Oct-2006
52/53
Changes
M50FW040
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53/53
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