STMicroelectronics M25P128-VME6TP 128 mbit (multilevel), low voltage, serial flash memory with 50mhz spi bus interface Datasheet

M25P128
128 Mbit (Multilevel), Low Voltage, Serial Flash Memory
With 50MHz SPI Bus Interface
PRELIMINARY DATA
Feature summary
■
128 Mbit of Flash Memory
■
Page Program (up to 256 Bytes) in 2.5ms
(typical)
■
Sector Erase (2Mbit)
■
Bulk Erase (128Mbit)
■
2.7 to 3.6V Single Supply Voltage
■
SPI Bus Compatible Serial Interface
■
50MHz Clock Rate (maximum)
■
Electronic Signature
– JEDEC Standard Two-Byte Signature
(2018h)
■
More than 10000 Erase/Program Cycles per
Sector
■
More than 20-Year Data Retention
■
Packages
– ECOPACK® (RoHS compliant)
January 2006
VDFPN8 (ME)
8x6mm (MLP8)
SO16 (MF)
300 mils width
Rev. 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/41
www.st.com
1
Contents
M25P128
Contents
1
Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
Serial data output (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2
Serial data input (D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3
Serial clock (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4
Chip Select (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5
Hold (HOLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6
Write Protect (W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
SPI modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4
Operating features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1
Page programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2
Sector Erase and Bulk Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3
Polling during a write, program or erase cycle . . . . . . . . . . . . . . . . . . . . . 10
4.4
Active power and standby power modes . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5
Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.6
Protection modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.7
Hold condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5
Memory Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1
Write Enable (WREN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2
Write Disable (WRDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3
Read Identification (RDID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4
Read Status Register (RDSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.5
2/41
6.4.1
WIP bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4.2
WEL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4.3
BP2, BP1, BP0 bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4.4
SRWD bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Write Status Register (WRSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rev. 1
M25P128
Contents
6.6
Read Data Bytes (READ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.7
Read Data Bytes at Higher Speed (FAST_READ) . . . . . . . . . . . . . . . . . . 24
6.8
Page Program (PP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.9
Sector Erase (SE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.10
Bulk Erase (BE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7
Power-up and power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8
Initial delivery state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11
Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
12
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Rev. 1
3/41
List of tables
M25P128
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.
4/41
Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Protected Area Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Memory Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Instruction Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Read Identification (RDID) Data-Out Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Status Register Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Power-Up Timing and VWI Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
VDFPN8 (MLP8), 8-lead Very thin Dual Flat Package No lead, 8x6mm,
Package Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
SO16 wide – 16 lead Plastic Small Outline, 300 mils body width . . . . . . . . . . . . . . . . . . . . 38
Ordering Information Scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Rev. 1
M25P128
List of figures
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.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
VDFPN Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SO Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Bus Master and Memory Devices on the SPI Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SPI Modes Supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Hold Condition Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Write Enable (WREN) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Write Disable (WRDI) Instruction Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Read Identification (RDID) Instruction Sequence and Data-Out Sequence . . . . . . . . . . . . 18
Read Status Register (RDSR) Instruction Sequence and Data-Out Sequence . . . . . . . . . 20
Write Status Register (WRSR) Instruction Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Read Data Bytes (READ) Instruction Sequence and Data-Out Sequence. . . . . . . . . . . . . 23
Read Data Bytes at Higher Speed (FAST_READ) Instruction and Data-Out Sequence . . 24
Page Program (PP) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Sector Erase (SE) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Bulk Erase (BE) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Power-up Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
AC Measurement I/O Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Serial Input Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Write Protect Setup and Hold Timing during WRSR when SRWD=1 . . . . . . . . . . . . . . . . . 35
Hold Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
VDFPN8 (MLP8), 8-lead Very thin Dual Flat Package No lead, 8x6mm, Package Outline 37
SO16 wide – 16 lead Plastic Small Outline, 300 mils body width . . . . . . . . . . . . . . . . . . . . 38
Rev. 1
5/41
Summary description
1
M25P128
Summary description
The M25P128 is a multilevel 128Mbit (16Mbit x 8) Serial Flash Memory, with advanced write
protection mechanisms, accessed by a high speed SPI-compatible bus.
The memory can be programmed 1 to 256 bytes at a time, using the Page Program
instruction.
The memory is organized as 64 sectors, each containing 1024 pages. Each page is 256
bytes wide. Thus, the whole memory can be viewed as consisting of 65536 pages, or
16777216 bytes.
The whole memory can be erased using the Bulk Erase instruction, or a sector at a time,
using the Sector Erase instruction.
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. ECOPACK® packages are Lead-free and RoHS compliant. ECOPACK is an ST
trademark. ECOPACK specifications are available at: www.st.com.
Figure 1.
Logic Diagram
VCC
D
Q
C
S
M25P128
W
HOLD
VSS
AI11313
Table 1.
6/41
Signal Names
C
Serial Clock
D
Serial Data Input
Q
Serial Data Output
S
Chip Select
W
Write Protect
HOLD
Hold
VCC
Supply Voltage
VSS
Ground
Rev. 1
M25P128
Summary description
Figure 2.
VDFPN Connections
M25P128
S
Q
W
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
C
D
AI11314
1. There is an exposed die paddle on the underside of the MLP8 package. This is pulled, internally, to VSS,
and must not be allowed to be connected to any other voltage or signal line on the PCB.
2. See Package mechanical section for package dimensions, and how to identify pin-1.
Figure 3.
SO Connections
M25P128
HOLD
VCC
DU
DU
DU
DU
S
Q
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C
D
DU
DU
DU
DU
VSS
W
AI11315
1. DU = Don’t Use
2. See Package mechanical section for package dimensions, and how to identify pin-1.
Rev. 1
7/41
Signal description
2
Signal description
2.1
Serial data output (Q)
M25P128
This output signal is used to transfer data serially out of the device. Data is shifted out on the
falling edge of Serial Clock (C).
2.2
Serial data input (D)
This input signal is used to transfer data serially into the device. It receives instructions,
addresses, and the data to be programmed. Values are latched on the rising edge of Serial
Clock (C).
2.3
Serial clock (C)
This input signal provides the timing of the serial interface. Instructions, addresses, or data
present at Serial Data Input (D) are latched on the rising edge of Serial Clock (C). Data on
Serial Data Output (Q) changes after the falling edge of Serial Clock (C).
2.4
Chip Select (S)
When this input signal is High, the device is deselected and Serial Data Output (Q) is at high
impedance. Unless an internal Program, Erase or Write Status Register cycle is in progress,
the device will be in the Standby Power mode. Driving Chip Select (S) Low selects the
device, placing it in the Active Power mode.
After Power-up, a falling edge on Chip Select (S) is required prior to the start of any
instruction.
2.5
Hold (HOLD)
The Hold (HOLD) signal is used to pause any serial communications with the device without
deselecting the device.
During the Hold condition, the Serial Data Output (Q) is high impedance, and Serial Data
Input (D) and Serial Clock (C) are Don’t Care.
To start the Hold condition, the device must be selected, with Chip Select (S) driven Low.
2.6
Write Protect (W)
The main purpose of this input signal is to freeze the size of the area of memory that is
protected against program or erase instructions (as specified by the values in the BP2, BP1
and BP0 bits of the Status Register).
8/41
Rev. 1
M25P128
SPI modes
3
SPI modes
These devices can be driven by a microcontroller with its SPI peripheral running in either of
the two following modes:
●
CPOL=0, CPHA=0
●
CPOL=1, CPHA=1
For these two modes, input data is latched in on the rising edge of Serial Clock (C), and
output data is available from the falling edge of Serial Clock (C).
The difference between the two modes, as shown in Figure 5, is the clock polarity when the
bus master is in Stand-by mode and not transferring data:
Figure 4.
●
C remains at 0 for (CPOL=0, CPHA=0)
●
C remains at 1 for (CPOL=1, CPHA=1)
Bus Master and Memory Devices on the SPI Bus
VCC
SDO
SPI Interface with
(CPOL, CPHA) =
(0, 0) or (1, 1)
SDI
SCK
C Q D
VCC
VCC
C Q D
VCC
C Q D
Bus Master
(ST6, ST7, ST9,
ST10, Others)
SPI Memory
Device
R(2)
CS3
CS2
SPI Memory
Device
R(2)
SPI Memory
Device
R(2)
CS1
S
W
HOLD
S
W
HOLD
S
W
HOLD
AI03746e
1. The Write Protect (W) and Hold (HOLD) signals should be driven, High or Low as appropriate.
Figure 5.
SPI Modes Supported
CPOL
CPHA
0
0
C
1
1
C
D
MSB
Q
MSB
AI01438B
Rev. 1
9/41
Operating features
4
Operating features
4.1
Page programming
M25P128
To program one data byte, two instructions are required: Write Enable (WREN), which is one
byte, and a Page Program (PP) sequence, which consists of four bytes plus data. This is
followed by the internal Program cycle (of duration tPP).
To spread this overhead, the Page Program (PP) instruction allows up to 256 bytes to be
programmed at a time (changing bits from 1 to 0), provided that they lie in consecutive
addresses on the same page of memory.
For optimized timings, it is recommended to use the Page Program (PP) instruction to
program all consecutive targeted Bytes in a single sequence versus using several Page
Program (PP) sequences with each containing only a few Bytes (see Section 6.8: Page
Program (PP) and Table 14: AC Characteristics).
4.2
Sector Erase and Bulk Erase
The Page Program (PP) instruction allows bits to be reset from 1 to 0. Before this can be
applied, the bytes of memory need to have been erased to all 1s (FFh). This can be
achieved either a sector at a time, using the Sector Erase (SE) instruction, or throughout the
entire memory, using the Bulk Erase (BE) instruction. This starts an internal Erase cycle (of
duration tSE or tBE).
The Erase instruction must be preceded by a Write Enable (WREN) instruction.
4.3
Polling during a write, program or erase cycle
A further improvement in the time to Write Status Register (WRSR), Program (PP) or Erase
(SE or BE) can be achieved by not waiting for the worst case delay (tW, tPP, tSE, or tBE). The
Write In Progress (WIP) bit is provided in the Status Register so that the application program
can monitor its value, polling it to establish when the previous Write cycle, Program cycle or
Erase cycle is complete.
4.4
Active power and standby power modes
When Chip Select (S) is Low, the device is selected, and in the Active Power mode.
When Chip Select (S) is High, the device is deselected, but could remain in the Active Power
mode until all internal cycles have completed (Program, Erase, Write Status Register). The
device then goes in to the Standby Power mode. The device consumption drops to ICC1.
10/41
Rev. 1
M25P128
4.5
Operating features
Status Register
The Status Register contains a number of status and control bits that can be read or set (as
appropriate) by specific instructions. See Section 6.4: Read Status Register (RDSR) for a
detailed description of the Status Register bits.
4.6
Protection modes
The environments where non-volatile memory devices are used can be very noisy. No SPI
device can operate correctly in the presence of excessive noise. To help combat this, the
M25P128 features the following data protection mechanisms:
●
Power On Reset and an internal timer (tPUW) can provide protection against inadvertant
changes while the power supply is outside the operating specification.
●
Program, Erase and Write Status Register instructions are checked that they consist of
a number of clock pulses that is a multiple of eight, before they are accepted for
execution.
●
All instructions that modify data must be preceded by a Write Enable (WREN)
instruction to set the Write Enable Latch (WEL) bit. This bit is returned to its reset state
by the following events:
–
Power-up
–
Write Disable (WRDI) instruction completion
–
Write Status Register (WRSR) instruction completion
–
Page Program (PP) instruction completion
–
Sector Erase (SE) instruction completion
–
Bulk Erase (BE) instruction completion
●
The Block Protect (BP2, BP1, BP0) bits allow part of the memory to be configured as
read-only. This is the Software Protected Mode (SPM).
●
The Write Protect (W) signal allows the Block Protect (BP2, BP1, BP0) bits and Status
Register Write Disable (SRWD) bit to be protected. This is the Hardware Protected
Mode (HPM).
Table 2.
Protected Area Sizes
Status Register Content
Memory Content
BP2 Bit BP1 Bit BP0 Bit
1.
Protected Area
Unprotected Area
0
0
0
none
All Sectors (Sectors 0 to 63)(1)
0
0
1
Upper 64th (1 Sector, 2Mb)
Sectors 0 to 62
0
1
0
Upper 32nd (2 Sectors, 4Mb)
Sectors 0 to 61
0
1
1
Upper 16nd (4 Sectors, 8Mb)
Sectors 0 to 59
1
0
0
Upper 8nd (8 Sectors, 16Mb)
Sectors 0 to 55
1
0
1
Upper Quarter (16 Sectors, 32Mb) Lower 3 Quarters (Sectors 0 to 47)
1
1
0
Upper Half (32 Sectors, 64Mb)
Lower Half (Sectors 0 to 31)
1
1
1
All sectors (64 Sectors, 128Mb)
none
The device is ready to accept a Bulk Erase instruction if, and only if, all Block Protect (BP2, BP1, BP0) are 0.
Rev. 1
11/41
Operating features
4.7
M25P128
Hold condition
The Hold (HOLD) signal is used to pause any serial communications with the device without
resetting the clocking sequence. However, taking this signal Low does not terminate any
Write Status Register, Program or Erase cycle that is currently in progress.
To enter the Hold condition, the device must be selected, with Chip Select (S) Low.
The Hold condition starts on the falling edge of the Hold (HOLD) signal, provided that this
coincides with Serial Clock (C) being Low (as shown in Figure 6).
The Hold condition ends on the rising edge of the Hold (HOLD) signal, provided that this
coincides with Serial Clock (C) being Low.
If the falling edge does not coincide with Serial Clock (C) being Low, the Hold condition
starts after Serial Clock (C) next goes Low. Similarly, if the rising edge does not coincide
with Serial Clock (C) being Low, the Hold condition ends after Serial Clock (C) next goes
Low. (This is shown in Figure 6).
During the Hold condition, the Serial Data Output (Q) is high impedance, and Serial Data
Input (D) and Serial Clock (C) are Don’t Care.
Normally, the device is kept selected, with Chip Select (S) driven Low, for the whole duration
of the Hold condition. This is to ensure that the state of the internal logic remains unchanged
from the moment of entering the Hold condition.
If Chip Select (S) goes High while the device is in the Hold condition, this has the effect of
resetting the internal logic of the device. To restart communication with the device, it is
necessary to drive Hold (HOLD) High, and then to drive Chip Select (S) Low. This prevents
the device from going back to the Hold condition.
Figure 6.
Hold Condition Activation
C
HOLD
Hold
Condition
(standard use)
Hold
Condition
(non-standard use)
AI02029D
12/41
Rev. 1
M25P128
5
Memory Organization
Memory Organization
The memory is organized as:
●
16777216 bytes (8 bits each)
●
64 sectors (2Mbits, 262144 bytes each)
●
65536 pages (256 bytes each).
Each page can be individually programmed (bits are programmed from 1 to 0). The device is
Sector or Bulk Erasable (bits are erased from 0 to 1) but not Page Erasable.
Figure 7.
Block Diagram
HOLD
W
High Voltage
Generator
Control Logic
S
C
D
I/O Shift Register
Q
Address Register
and Counter
Status
Register
256 Byte
Data Buffer
FFFFFFh
Y Decoder
Size of the
read-only
memory area
00000h
000FFh
256 Bytes (Page Size)
X Decoder
AI11316
Rev. 1
13/41
Memory Organization
Table 3.
M25P128
Memory Organization
Sector
14/41
Address Range
63
FC0000h
FFFFFFh
62
F80000h
FBFFFFh
61
F40000h
F7FFFFh
60
F00000h
F3FFFFh
59
EC0000h
EFFFFFh
58
E80000h
EBFFFFh
57
E40000h
E7FFFFh
56
E00000h
E3FFFFh
55
DC0000h
DFFFFFh
54
D80000h
DBFFFFh
53
D40000h
D7FFFFh
52
D00000h
D3FFFFh
51
CC0000h
CFFFFFh
50
C80000h
CBFFFFh
49
C40000h
C7FFFFh
48
C00000h
C3FFFFh
47
BC0000h
BFFFFFh
46
B80000h
BBFFFFh
45
B40000h
B7FFFFh
44
B00000h
B3FFFFh
43
AC0000h
AFFFFFh
42
A80000h
ABFFFFh
41
A40000h
A7FFFFh
40
A00000h
A3FFFFh
39
9C0000h
9FFFFFh
38
980000h
9BFFFFh
37
940000h
97FFFFh
36
900000h
93FFFFh
35
8C0000h
8FFFFFh
34
880000h
8BFFFFh
33
840000h
87FFFFh
32
800000h
83FFFFh
31
7C0000h
7FFFFFh
30
780000h
7BFFFFh
29
740000h
77FFFFh
Rev. 1
M25P128
Memory Organization
Table 3.
Memory Organization (continued)
Sector
Address Range
28
700000h
73FFFFh
27
6C0000h
6FFFFFh
26
680000h
6BFFFFh
25
640000h
67FFFFh
24
600000h
63FFFFh
23
5C0000h
5FFFFFh
22
580000h
5BFFFFh
21
540000h
57FFFFh
20
500000h
53FFFFh
19
4C0000h
4FFFFFh
18
480000h
4BFFFFh
17
440000h
47FFFFh
16
400000h
43FFFFh
15
3C0000h
3FFFFFh
14
380000h
3BFFFFh
13
340000h
37FFFFh
12
300000h
33FFFFh
11
2C0000h
2FFFFFh
10
280000h
2BFFFFh
9
240000h
27FFFFh
8
200000h
23FFFFh
7
1C0000h
1FFFFFh
6
180000h
1BFFFFh
5
140000h
17FFFFh
4
100000h
13FFFFh
3
0C0000h
0FFFFFh
2
080000h
0BFFFFh
1
040000h
07FFFFh
0
000000h
03FFFFh
Rev. 1
15/41
Instructions
6
M25P128
Instructions
All instructions, addresses and data are shifted in and out of the device, most significant bit
first.
Serial Data Input (D) is sampled on the first rising edge of Serial Clock (C) after Chip Select
(S) is driven Low. Then, the one-byte instruction code must be shifted in to the device, most
significant bit first, on Serial Data Input (D), each bit being latched on the rising edges of
Serial Clock (C).
The instruction set is listed in Table 4.
Every instruction sequence starts with a one-byte instruction code. Depending on the
instruction, this might be followed by address bytes, or by data bytes, or by both or none.
In the case of a Read Data Bytes (READ), Read Data Bytes at Higher Speed (Fast_Read),
Read Status Register (RDSR) or Read Identification (RDID) instruction, the shifted-in
instruction sequence is followed by a data-out sequence. Chip Select (S) can be driven High
after any bit of the data-out sequence is being shifted out.
In the case of a Page Program (PP), Sector Erase (SE), Bulk Erase (BE), Write Status
Register (WRSR), Write Enable (WREN) or Write Disable (WRDI), Chip Select (S) must be
driven High exactly at a byte boundary, otherwise the instruction is rejected, and is not
executed. That is, Chip Select (S) must driven High when the number of clock pulses after
Chip Select (S) being driven Low is an exact multiple of eight.
All attempts to access the memory array during a Write Status Register cycle, Program
cycle or Erase cycle are ignored, and the internal Write Status Register cycle, Program
cycle or Erase cycle continues unaffected.
Table 4.
Instruction Set
Instruction
Address Dummy
Bytes
Bytes
Data
Bytes
WREN
Write Enable
0000 0110
06h
0
0
0
WRDI
Write Disable
0000 0100
04h
0
0
0
RDID
Read Identification
1001 1111
9Fh
0
0
1 to 3
RDSR
Read Status Register
0000 0101
05h
0
0
1 to ∞
WRSR
Write Status Register
0000 0001
01h
0
0
1
READ
Read Data Bytes
0000 0011
03h
3
0
1 to ∞
Read Data Bytes at Higher
Speed
0000 1011
0Bh
3
1
1 to ∞
PP
Page Program
0000 0010
02h
3
0
1 to 256
SE
Sector Erase
1101 1000
D8h
3
0
0
BE
Bulk Erase
1100 0111
C7h
0
0
0
FAST_READ
16/41
One-byte Instruction
Code
Description
Rev. 1
M25P128
6.1
Instructions
Write Enable (WREN)
The Write Enable (WREN) instruction (Figure 8) sets the Write Enable Latch (WEL) bit.
The Write Enable Latch (WEL) bit must be set prior to every Page Program (PP), Sector
Erase (SE), Bulk Erase (BE) and Write Status Register (WRSR) instruction.
The Write Enable (WREN) instruction is entered by driving Chip Select (S) Low, sending the
instruction code, and then driving Chip Select (S) High.
Figure 8.
Write Enable (WREN) Instruction Sequence
S
0
1
2
3
4
5
6
7
C
Instruction
D
High Impedance
Q
AI02281E
6.2
Write Disable (WRDI)
The Write Disable (WRDI) instruction (Figure 9) resets the Write Enable Latch (WEL) bit.
The Write Disable (WRDI) instruction is entered by driving Chip Select (S) Low, sending the
instruction code, and then driving Chip Select (S) High.
The Write Enable Latch (WEL) bit is reset under the following conditions:
●
Power-up
●
Write Disable (WRDI) instruction completion
●
Write Status Register (WRSR) instruction completion
●
Page Program (PP) instruction completion
●
Sector Erase (SE) instruction completion
●
Bulk Erase (BE) instruction completion
Figure 9.
Write Disable (WRDI) Instruction Sequence
S
0
1
2
3
4
5
6
7
C
Instruction
D
High Impedance
Q
AI03750D
Rev. 1
17/41
Instructions
6.3
M25P128
Read Identification (RDID)
The Read Identification (RDID) instruction allows the 8-bit manufacturer identification to be
read, followed by two bytes of device identification. The manufacturer identification is
assigned by JEDEC, and has the value 20h for STMicroelectronics. The device identification
is assigned by the device manufacturer, and indicates the memory type in the first byte
(20h), and the memory capacity of the device in the second byte (18h).
Any Read Identification (RDID) instruction while an Erase or Program cycle is in progress, is
not decoded, and has no effect on the cycle that is in progress.
The device is first selected by driving Chip Select (S) Low. Then, the 8-bit instruction code
for the instruction is shifted in. This is followed by the 24-bit device identification, stored in
the memory, being shifted out on Serial Data Output (Q), each bit being shifted out during
the falling edge of Serial Clock (C).
The instruction sequence is shown in Figure 10.
The Read Identification (RDID) instruction is terminated by driving Chip Select (S) High at
any time during data output.
When Chip Select (S) is driven High, the device is put in the Standby Power mode. Once in
the Standby Power mode, the device waits to be selected, so that it can receive, decode and
execute instructions.
Table 5.
Read Identification (RDID) Data-Out Sequence
Device Identification
Manufacturer Identification
Memory Type
Memory Capacity
20h
18h
20h
Figure 10. Read Identification (RDID) Instruction Sequence and Data-Out Sequence
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
28 29 30 31
C
Instruction
D
Manufacturer Identification
Device Identification
High Impedance
Q
15 14 13
MSB
3
2
1
0
MSB
AI06809b
18/41
Rev. 1
M25P128
6.4
Instructions
Read Status Register (RDSR)
The Read Status Register (RDSR) instruction allows the Status Register to be read. The
Status Register may be read at any time, even while a Program, Erase or Write Status
Register cycle is in progress. When one of these cycles is in progress, it is recommended to
check the Write In Progress (WIP) bit before sending a new instruction to the device. It is
also possible to read the Status Register continuously, as shown in Figure 11.
Table 6.
Status Register Format
b7
SRWD
b0
0
0
BP2
BP1
BP0
WEL
WIP
Status Register Write Protect
Block Protect Bits
Write Enable Latch Bit
Write In Progress Bit
The status and control bits of the Status Register are as follows:
6.4.1
WIP bit
The Write In Progress (WIP) bit indicates whether the memory is busy with a Write Status
Register, Program or Erase cycle. When set to 1, such a cycle is in progress, when reset to
0 no such cycle is in progress.
6.4.2
WEL bit
The Write Enable Latch (WEL) bit indicates the status of the internal Write Enable Latch.
When set to 1 the internal Write Enable Latch is set, when set to 0 the internal Write Enable
Latch is reset and no Write Status Register, Program or Erase instruction is accepted.
6.4.3
BP2, BP1, BP0 bits
The Block Protect (BP2, BP1, BP0) bits are non-volatile. They define the size of the area to
be software protected against Program and Erase instructions. These bits are written with
the Write Status Register (WRSR) instruction. When one or more of the Block Protect (BP2,
BP1, BP0) bits is set to 1, the relevant memory area (as defined in Table 2) becomes
protected against Page Program (PP) and Sector Erase (SE) instructions. The Block Protect
(BP2, BP1, BP0) bits can be written provided that the Hardware Protected mode has not
been set. The Bulk Erase (BE) instruction is executed if, and only if, all Block Protect (BP2,
BP1, BP0) bits are 0.
6.4.4
SRWD bit
The Status Register Write Disable (SRWD) bit is operated in conjunction with the Write
Protect (W) signal. The Status Register Write Disable (SRWD) bit and Write Protect (W)
signal allow the device to be put in the Hardware Protected mode (when the Status Register
Write Disable (SRWD) bit is set to 1, and Write Protect (W) is driven Low). In this mode, the
non-volatile bits of the Status Register (SRWD, BP2, BP1, BP0) become read-only bits and
the Write Status Register (WRSR) instruction is no longer accepted for execution.
Rev. 1
19/41
Instructions
M25P128
Figure 11. Read Status Register (RDSR) Instruction Sequence and Data-Out
Sequence
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
C
Instruction
D
Status Register Out
Status Register Out
High Impedance
Q
7
6
5
MSB
4
3
2
1
0
7
6
5
4
3
2
1
0
7
MSB
AI02031E
20/41
Rev. 1
M25P128
6.5
Instructions
Write Status Register (WRSR)
The Write Status Register (WRSR) instruction allows new values to be written to the Status
Register. Before it can be accepted, a Write Enable (WREN) instruction must previously
have been executed. After the Write Enable (WREN) instruction has been decoded and
executed, the device sets the Write Enable Latch (WEL).
The Write Status Register (WRSR) instruction is entered by driving Chip Select (S) Low,
followed by the instruction code and the data byte on Serial Data Input (D).
The instruction sequence is shown in Figure 12.
The Write Status Register (WRSR) instruction has no effect on b6, b5, b1 and b0 of the
Status Register. b6 and b5 are always read as 0.
Chip Select (S) must be driven High after the eighth bit of the data byte has been latched in.
If not, the Write Status Register (WRSR) instruction is not executed. As soon as Chip Select
(S) is driven High, the self-timed Write Status Register cycle (whose duration is tW) is
initiated. While the Write Status Register cycle is in progress, the Status Register may still
be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP)
bit is 1 during the self-timed Write Status Register cycle, and is 0 when it is completed.
When the cycle is completed, the Write Enable Latch (WEL) is reset.
The Write Status Register (WRSR) instruction allows the user to change the values of the
Block Protect (BP2, BP1, BP0) bits, to define the size of the area that is to be treated as
read-only, as defined in Table 2. The Write Status Register (WRSR) instruction also allows
the user to set or reset the Status Register Write Disable (SRWD) bit in accordance with the
Write Protect (W) signal. The Status Register Write Disable (SRWD) bit and Write Protect
(W) signal allow the device to be put in the Hardware Protected Mode (HPM). The Write
Status Register (WRSR) instruction is not executed once the Hardware Protected Mode
(HPM) is entered.
Table 7.
Protection Modes
W
Signal
SRWD
Bit
1
0
0
0
1
1
0
1
Mode
Write Protection of the
Status Register
Memory Content
Protected Area(1)
Unprotected Area(1)
Status Register is Writable
(if the WREN instruction
Software has set the WEL bit)
Protected
(SPM) The values in the SRWD,
BP2, BP1 and BP0 bits
can be changed
Protected against
Page Program,
Sector Erase and
Bulk Erase
Ready to accept
Page Program and
Sector Erase
instructions
Status Register is
Hardware Hardware write protected
Protected The values in the SRWD,
(HPM) BP2, BP1 and BP0 bits
cannot be changed
Protected against
Page Program,
Sector Erase and
Bulk Erase
Ready to accept
Page Program and
Sector Erase
instructions
1. As defined by the values in the Block Protect (BP2, BP1, BP0) bits of the Status Register, as shown in
Table 2: Protected Area Sizes.
The protection features of the device are summarized in Table 7
When the Status Register Write Disable (SRWD) bit of the Status Register is 0 (its initial
delivery state), it is possible to write to the Status Register provided that the Write Enable
Rev. 1
21/41
Instructions
M25P128
Latch (WEL) bit has previously been set by a Write Enable (WREN) instruction, regardless
of the whether Write Protect (W) is driven High or Low.
When the Status Register Write Disable (SRWD) bit of the Status Register is set to 1, two
cases need to be considered, depending on the state of Write Protect (W):
●
If Write Protect (W) is driven High, it is possible to write to the Status Register provided
that the Write Enable Latch (WEL) bit has previously been set by a Write Enable
(WREN) instruction.
●
If Write Protect (W) is driven Low, it is not possible to write to the Status Register even
if the Write Enable Latch (WEL) bit has previously been set by a Write Enable (WREN)
instruction. (Attempts to write to the Status Register are rejected, and are not accepted
for execution). As a consequence, all the data bytes in the memory area that are
software protected (SPM) by the Block Protect (BP2, BP1, BP0) bits of the Status
Register, are also hardware protected against data modification.
Regardless of the order of the two events, the Hardware Protected Mode (HPM) can be
entered:
●
by setting the Status Register Write Disable (SRWD) bit after driving Write Protect (W)
Low
●
or by driving Write Protect (W) Low after setting the Status Register Write Disable
(SRWD) bit.
The only way to exit the Hardware Protected Mode (HPM) once entered is to pull Write
Protect (W) High.
If Write Protect (W) is permanently tied High, the Hardware Protected Mode (HPM) can
never be activated, and only the Software Protected Mode (SPM), using the Block Protect
(BP2, BP1, BP0) bits of the Status Register, can be used.
Figure 12. Write Status Register (WRSR) Instruction Sequence
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
C
Instruction
Status
Register In
7
D
High Impedance
6
5
4
3
2
1
0
MSB
Q
AI02282D
22/41
Rev. 1
M25P128
6.6
Instructions
Read Data Bytes (READ)
The device is first selected by driving Chip Select (S) Low. The instruction code for the Read
Data Bytes (READ) instruction is followed by a 3-byte address (A23-A0), each bit being
latched-in during the rising edge of Serial Clock (C). Then the memory contents, at that
address, is shifted out on Serial Data Output (Q), each bit being shifted out, at a maximum
frequency fR, during the falling edge of Serial Clock (C).
The instruction sequence is shown in Figure 13.
The first byte addressed can be at any location. The address is automatically incremented
to the next higher address after each byte of data is shifted out. The whole memory can,
therefore, be read with a single Read Data Bytes (READ) instruction. When the highest
address is reached, the address counter rolls over to 000000h, allowing the read sequence
to be continued indefinitely.
The Read Data Bytes (READ) instruction is terminated by driving Chip Select (S) High. Chip
Select (S) can be driven High at any time during data output. Any Read Data Bytes (READ)
instruction, while an Erase, Program or Write cycle is in progress, is rejected without having
any effects on the cycle that is in progress.
Figure 13. Read Data Bytes (READ) Instruction Sequence and Data-Out Sequence
S
0
1
2
3
4
5
6
7
8
9 10
28 29 30 31 32 33 34 35 36 37 38 39
C
Instruction
24-Bit Address
23 22 21
D
3
2
1
0
MSB
Data Out 1
High Impedance
7
Q
6
5
4
3
2
Data Out 2
1
0
7
MSB
AI03748D
Rev. 1
23/41
Instructions
6.7
M25P128
Read Data Bytes at Higher Speed (FAST_READ)
The device is first selected by driving Chip Select (S) Low. The instruction code for the Read
Data Bytes at Higher Speed (FAST_READ) instruction is followed by a 3-byte address (A23A0) and a dummy byte, each bit being latched-in during the rising edge of Serial Clock (C).
Then the memory contents, at that address, is shifted out on Serial Data Output (Q), each
bit being shifted out, at a maximum frequency fC, during the falling edge of Serial Clock (C).
The instruction sequence is shown in Figure 14.
The first byte addressed can be at any location. The address is automatically incremented
to the next higher address after each byte of data is shifted out. The whole memory can,
therefore, be read with a single Read Data Bytes at Higher Speed (FAST_READ)
instruction. When the highest address is reached, the address counter rolls over to
000000h, allowing the read sequence to be continued indefinitely.
The Read Data Bytes at Higher Speed (FAST_READ) instruction is terminated by driving
Chip Select (S) High. Chip Select (S) can be driven High at any time during data output. Any
Read Data Bytes at Higher Speed (FAST_READ) instruction, while an Erase, Program or
Write cycle is in progress, is rejected without having any effects on the cycle that is in
progress.
Figure 14. Read Data Bytes at Higher Speed (FAST_READ) Instruction and Data-Out
Sequence
S
0
1
2
3
4
5
6
7
8
9 10
28 29 30 31
C
Instruction
24 BIT ADDRESS
23 22 21
D
3
2
1
0
High Impedance
Q
S
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
C
Dummy Byte
D
7
6
5
4
3
2
1
0
DATA OUT 2
DATA OUT 1
Q
7
6
5
MSB
4
3
2
1
0
7
MSB
6
5
4
3
2
1
0
7
MSB
AI04006
24/41
Rev. 1
M25P128
6.8
Instructions
Page Program (PP)
The Page Program (PP) instruction allows bytes to be programmed in the memory
(changing bits from 1 to 0). Before it can be accepted, a Write Enable (WREN) instruction
must previously have been executed. After the Write Enable (WREN) instruction has been
decoded, the device sets the Write Enable Latch (WEL).
The Page Program (PP) instruction is entered by driving Chip Select (S) Low, followed by
the instruction code, three address bytes and at least one data byte on Serial Data Input (D).
If the 8 least significant address bits (A7-A0) are not all zero, all transmitted data that goes
beyond the end of the current page are programmed from the start address of the same
page (from the address whose 8 least significant bits (A7-A0) are all zero). Chip Select (S)
must be driven Low for the entire duration of the sequence. The instruction sequence is
shown in Figure 15.
If more than 256 bytes are sent to the device, previously latched data are discarded and the
last 256 data bytes are guaranteed to be programmed correctly within the same page. If less
than 256 Data bytes are sent to device, they are correctly programmed at the requested
addresses without having any effects on the other bytes of the same page.
For optimized timings, it is recommended to use the Page Program (PP) instruction to
program all consecutive targeted Bytes in a single sequence versus using several Page
Program (PP) sequences with each containing only a few Bytes (see Table 14: AC
Characteristics).
Chip Select (S) must be driven High after the eighth bit of the last data byte has been
latched in, otherwise the Page Program (PP) instruction is not executed.
As soon as Chip Select (S) is driven High, the self-timed Page Program cycle (whose
duration is tPP) is initiated. While the Page Program cycle is in progress, the Status Register
may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress
(WIP) bit is 1 during the self-timed Page Program cycle, and is 0 when it is completed. At
some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is
reset.
A Page Program (PP) instruction applied to a page which is protected by the Block Protect
(BP2, BP1, BP0) bits (see Table 2 and Table 3) is not executed.
Rev. 1
25/41
Instructions
M25P128
Figure 15. Page Program (PP) Instruction Sequence
S
0
1
2
3
4
5
6
7
8
28 29 30 31 32 33 34 35 36 37 38 39
9 10
C
Instruction
24-Bit Address
23 22 21
D
3
2
Data Byte 1
1
0
7
6
5
4
3
2
0
1
MSB
MSB
2078
2079
2077
2076
2075
2074
2073
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
2072
S
1
0
C
Data Byte 2
D
7
6
MSB
26/41
5
4
3
2
Data Byte 3
1
0
7
6
5
MSB
Rev. 1
4
3
2
Data Byte 256
1
0
7
6
MSB
5
4
3
2
AI04082B
M25P128
6.9
Instructions
Sector Erase (SE)
The Sector Erase (SE) instruction sets to 1 (FFh) all bits inside the chosen sector. Before it
can be accepted, a Write Enable (WREN) instruction must previously have been executed.
After the Write Enable (WREN) instruction has been decoded, the device sets the Write
Enable Latch (WEL).
The Sector Erase (SE) instruction is entered by driving Chip Select (S) Low, followed by the
instruction code, and three address bytes on Serial Data Input (D). Any address inside the
Sector (see Table 3) is a valid address for the Sector Erase (SE) instruction. Chip Select (S)
must be driven Low for the entire duration of the sequence.
The instruction sequence is shown in Figure 16.
Chip Select (S) must be driven High after the eighth bit of the last address byte has been
latched in, otherwise the Sector Erase (SE) instruction is not executed. As soon as Chip
Select (S) is driven High, the self-timed Sector Erase cycle (whose duration is tSE) is
initiated. While the Sector Erase cycle is in progress, the Status Register may be read to
check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1
during the self-timed Sector Erase cycle, and is 0 when it is completed. At some unspecified
time before the cycle is completed, the Write Enable Latch (WEL) bit is reset.
A Sector Erase (SE) instruction applied to a page which is protected by the Block Protect
(BP2, BP1, BP0) bits (see Table 2 and Table 3) is not executed.
Figure 16. Sector Erase (SE) Instruction Sequence
S
0
1
2
3
4
5
6
7
8
9
29 30 31
C
Instruction
24 Bit Address
23 22
D
2
1
0
MSB
AI03751D
Rev. 1
27/41
Instructions
6.10
M25P128
Bulk Erase (BE)
The Bulk Erase (BE) instruction sets all bits to 1 (FFh). Before it can be accepted, a Write
Enable (WREN) instruction must previously have been executed. After the Write Enable
(WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL).
The Bulk Erase (BE) instruction is entered by driving Chip Select (S) Low, followed by the
instruction code on Serial Data Input (D). Chip Select (S) must be driven Low for the entire
duration of the sequence.
The instruction sequence is shown in Figure 17.
Chip Select (S) must be driven High after the eighth bit of the instruction code has been
latched in, otherwise the Bulk Erase instruction is not executed. As soon as Chip Select (S)
is driven High, the self-timed Bulk Erase cycle (whose duration is tBE) is initiated. While the
Bulk Erase cycle is in progress, the Status Register may be read to check the value of the
Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Bulk
Erase cycle, and is 0 when it is completed. At some unspecified time before the cycle is
completed, the Write Enable Latch (WEL) bit is reset.
The Bulk Erase (BE) instruction is executed only if all Block Protect (BP2, BP1, BP0) bits are
0. The Bulk Erase (BE) instruction is ignored if one, or more, sectors are protected.
Figure 17. Bulk Erase (BE) Instruction Sequence
S
0
1
2
3
4
5
6
7
C
Instruction
D
AI03752D
28/41
Rev. 1
M25P128
7
Power-up and power-down
Power-up and power-down
At Power-up and Power-down, the device must not be selected (that is Chip Select (S) must
follow the voltage applied on VCC) until VCC reaches the correct value:
●
VCC(min) at Power-up, and then for a further delay of tVSL
●
VSS at Power-down
Usually a simple pull-up resistor on Chip Select (S) can be used to ensure safe and proper
Power-up and Power-down.
To avoid data corruption and inadvertent write operations during Power-up, a Power On
Reset (POR) circuit is included. The logic inside the device is held reset while VCC is less
than the Power On Reset (POR) threshold voltage, VWI – all operations are disabled, and
the device does not respond to any instruction.
Moreover, the device ignores all Write Enable (WREN), Page Program (PP), Sector Erase
(SE), Bulk Erase (BE) and Write Status Register (WRSR) instructions until a time delay of
tPUW has elapsed after the moment that VCC rises above the VWI threshold. However, the
correct operation of the device is not guaranteed if, by this time, VCC is still below VCC(min).
No Write Status Register, Program or Erase instructions should be sent until the later of:
●
tPUW after VCC passed the VWI threshold
●
tVSL after VCC passed the VCC(min) level
These values are specified in Table 8.
If the delay, tVSL, has elapsed, after VCC has risen above VCC(min), the device can be
selected for READ instructions even if the tPUW delay is not yet fully elapsed.
At Power-up, the device is in the following state:
●
The device is in the Standby Power mode
●
The Write Enable Latch (WEL) bit is reset.
Normal precautions must be taken for supply rail decoupling, to stabilize the VCC supply.
Each device in a system should have the VCC rail decoupled by a suitable capacitor close to
the package pins. (Generally, this capacitor is of the order of 0.1µF).
At Power-down, when VCC drops from the operating voltage, to below the Power On Reset
(POR) threshold voltage, VWI, all operations are disabled and the device does not respond
to any instruction. (The designer needs to be aware that if a Power-down occurs while a
Write, Program or Erase cycle is in progress, some data corruption can result.)
Rev. 1
29/41
Initial delivery state
M25P128
Figure 18. Power-up Timing
VCC
VCC(max)
Program, Erase and Write Commands are Rejected by the Device
Chip Selection Not Allowed
VCC(min)
tVSL
Reset State
of the
Device
Read Access allowed
Device fully
accessible
VWI
tPUW
time
AI04009C
Table 8.
Power-Up Timing and VWI Threshold
Symbol
Parameter
Min.
Max.
tVSL(1)
VCC(min) to S Low
60
tPUW(1)
Time delay to Write instruction
1
10
ms
1.5
2.5
V
VWI
Write Inhibit Voltage
µs
1. These parameters are characterized only.
8
Initial delivery state
The device is delivered with the memory array erased: all bits are set to 1 (each byte
contains FFh). The Status Register contains 00h (all Status Register bits are 0).
30/41
Unit
Rev. 1
M25P128
9
Maximum rating
Maximum rating
Stressing the device outside the ratings listed in Table 9 may cause permanent damage to
the device. These are stress ratings only, and operation of the device at these, or any other
conditions outside 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 9.
Absolute Maximum Ratings
Symbol
Min.
Max.
Unit
Storage Temperature
–65
150
°C
VIO
Input and Output Voltage (with respect to Ground)
–0.5
4.0
V
VCC
Supply Voltage
–0.2
4.0
V
–2000
2000
V
TSTG
VESD
Parameter
Electrostatic Discharge Voltage (Human Body model)
(1)
1. JEDEC Std JESD22-A114A (C1=100 pF, R1=1500 Ω, R2=500 Ω)
Rev. 1
31/41
DC and AC parameters
10
M25P128
DC and AC parameters
This section summarizes the operating and measurement conditions, and the DC and AC
characteristics of the device. The parameters in the DC and AC Characteristic tables that
follow are derived from tests performed under the Measurement Conditions summarized in
the relevant tables. Designers should check that the operating conditions in their circuit
match the measurement conditions when relying on the quoted parameters.
Table 10.
Operating Conditions
Symbol
VCC
TA
Table 11.
Parameter
Min.
Max.
Unit
Supply Voltage
2.7
3.6
V
Ambient Operating Temperature
–40
85
°C
AC Measurement Conditions
Symbol
CL
Parameter
Min.
Max.
Load Capacitance
30
Input Rise and Fall Times
Unit
pF
5
ns
Input Pulse Voltages
0.2VCC to 0.8VCC
V
Input Timing Reference Voltages
0.3VCC to 0.7VCC
V
VCC / 2
V
Output Timing Reference Voltages
1. Output Hi-Z is defined as the point where data out is no longer driven.
Figure 19. AC Measurement I/O Waveform
Input Levels
Input and Output
Timing Reference Levels
0.8VCC
0.7VCC
0.5VCC
0.3VCC
0.2VCC
AI07455
Table 12.
Symbol
COUT
CIN
Capacitance
Parameter
Test Condition
Output Capacitance (Q)
Input Capacitance (other pins)
Max.
Unit
VOUT = 0V
8
pF
VIN = 0V
6
pF
1. Sampled only, not 100% tested, at TA=25°C and a frequency of 20 MHz.
32/41
Rev. 1
Min.
M25P128
DC and AC parameters
Table 13.
Symbol
DC Characteristics
Parameter
Test Condition
(in addition to those in Table 10)
Min.
Max.
Unit
ILI
Input Leakage Current
±2
µA
ILO
Output Leakage Current
±2
µA
ICC1
Standby Current
S = VCC, VIN = VSS or VCC
100
µA
C = 0.1VCC / 0.9.VCC at 50MHz,
Q = open
8
mA
C = 0.1VCC / 0.9.VCC at 20MHz,
Q = open
4
mA
ICC3
Operating Current (READ)
ICC4
Operating Current (PP)
S = VCC
20
mA
ICC5
Operating Current
(WRSR)
S = VCC
20
mA
ICC6
Operating Current (SE)
S = VCC
20
mA
ICC7
Operating Current (BE)
S = VCC
20
mA
VIL
Input Low Voltage
– 0.5
0.3VCC
V
VIH
Input High Voltage
0.7VCC
VCC+0.2
V
VOL
Output Low Voltage
0.4
V
VOH
Output High Voltage
IOL = 1.6mA
IOH
Rev. 1
= –100µA
VCC–0.2
V
33/41
DC and AC parameters
Table 14.
M25P128
AC Characteristics
Test conditions specified in Table 10 and Table 11
Symbol
Alt.
Parameter
Min.
fC
fC
Clock Frequency for the following instructions: FAST_READ,
PP, SE, BE, WREN, WRDI, RDID, RDSR, WRSR
Clock Frequency for READ instructions
fR
Typ.
Max.
Unit
D.C.
50
MHz
D.C.
20
MHz
tCH(1)
tCL(1)
tCLCH(2)
tCHCL(2)
tCLH
Clock High Time
9
ns
tCLL
Clock Low Time
9
ns
0.1
V/ns
0.1
V/ns
tSLCH
tCSS
S Active Setup Time (relative to C)
5
ns
S Not Active Hold Time (relative to C)
5
ns
(3)
Clock Rise Time
(3)
Clock Fall Time
tCHSL
(peak to peak)
(peak to peak)
tDVCH
tDSU
Data In Setup Time
2
ns
tCHDX
tDH
Data In Hold Time
5
ns
tCHSH
S Active Hold Time (relative to C)
5
ns
tSHCH
S Not Active Setup Time (relative to C)
5
ns
100
ns
tSHSL
tCSH
S Deselect Time
tSHQZ(2)
tDIS
Output Disable Time
8
ns
tCLQV
tV
Clock Low to Output Valid
8
ns
tCLQX
tHO
Output Hold Time
0
ns
tHLCH
HOLD Setup Time (relative to C)
5
ns
tCHHH
HOLD Hold Time (relative to C)
5
ns
tHHCH
HOLD Setup Time (relative to C)
5
ns
tCHHL
HOLD Hold Time (relative to C)
5
ns
tHHQX(2)
tHLQZ(2)
tWHSL(4)
tSHWL (4)
tW
tPP(5)
tLZ
HOLD to Output Low-Z
8
ns
tHZ
HOLD to Output High-Z
8
ns
Write Protect Setup Time
20
ns
Write Protect Hold Time
100
ns
Write Status Register Cycle Time
5
15
ms
7
ms
2
6
s
105
250
s
Page Program Cycle Time (256 Bytes)
2.5
Page Program Cycle Time (n Bytes)
2.5
tSE
Sector Erase Cycle Time
tBE
Bulk Erase Cycle Time
1. tCH and tCL must be greater than or equal to 1/fC (max).
2. Value is guaranteed by characterization, not 100% tested in production.
3. Expressed as a slew-rate.
4. Only applicable as a constraint for WRSR instruction when SRWD is set to 1.
5. Due to the Multi Level Cell technology, when using the Page Program (PP) instruction to program consecutive Bytes,
optimized timings are obtained with one sequence including all the Bytes versus several sequences of only a few Bytes. If
only a single byte is programmed, the estimated programming time is close to the time needed to program a full page of
256 Bytes. Therefore, it is highly recommended to use the Page Program (PP) instruction with a sequence of 256
consecutive Bytes. (1 ≤n ≤256)
34/41
Rev. 1
M25P128
DC and AC parameters
Figure 20. Serial Input Timing
tSHSL
S
tCHSL
tSLCH
tCHSH
tSHCH
C
tDVCH
tCHCL
tCHDX
D
Q
tCLCH
LSB IN
MSB IN
High Impedance
AI01447C
Figure 21. Write Protect Setup and Hold Timing during WRSR when SRWD=1
W
tSHWL
tWHSL
S
C
D
High Impedance
Q
AI07439
Rev. 1
35/41
DC and AC parameters
M25P128
Figure 22. Hold Timing
S
tHLCH
tCHHL
tHHCH
C
tCHHH
tHLQZ
tHHQX
Q
D
HOLD
AI02032
Figure 23. Output Timing
S
tCH
C
tCLQV
tCLQX
tCLQV
tCL
tSHQZ
tCLQX
LSB OUT
Q
tQLQH
tQHQL
D
ADDR.LSB IN
AI01449e
36/41
Rev. 1
M25P128
11
Package mechanical
Package mechanical
Figure 24. VDFPN8 (MLP8), 8-lead Very thin Dual Flat Package No lead, 8x6mm,
Package Outline
D
E
E2
e
b
D2
A
L
L1
ddd
A1
VDFPN-02
1. Drawing is not to scale.
2. The circle in the top view of the package indicates the position of pin 1.
Table 15.
VDFPN8 (MLP8), 8-lead Very thin Dual Flat Package No lead, 8x6mm,
Package Mechanical Data
millimeters
inches
Symbol
Typ.
A
Min.
0.85
A1
Max.
Typ.
1.00
0.0335
0.00
0.05
0.35
0.48
b
0.40
D
8.00
0.3150
D2
6.40
0.2520
ddd
0.0157
0.2362
E2
4.80
0.1890
e
1.27
K
–
0.0500
0.20
0.0020
0.0138
0.0189
0.50
–
–
0.0079
0.45
0.60
L1
N
0.0000
0.0020
6.00
–
Max.
0.0394
0.05
E
L
Min.
0.0197
0.0177
0.15
8
0.0236
0.0059
8
Rev. 1
37/41
Package mechanical
M25P128
Figure 25. SO16 wide – 16 lead Plastic Small Outline, 300 mils body width
D
16
h x 45˚
9
C
E
1
θ
8
A2
B
H
A1
A
L
ddd
e
SO-H
1. Drawing is not to scale.
Table 16.
SO16 wide – 16 lead Plastic Small Outline, 300 mils body width
millimeters
inches
Symbol
Typ
Min
Max
A
2.35
A1
Min
Max
2.65
0.093
0.104
0.10
0.30
0.004
0.012
B
0.33
0.51
0.013
0.020
C
0.23
0.32
0.009
0.013
D
10.10
10.50
0.398
0.413
E
7.40
7.60
0.291
0.299
–
–
–
–
H
10.00
10.65
0.394
0.419
h
0.25
0.75
0.010
0.030
L
0.40
1.27
0.016
0.050
θ
0°
8°
0°
8°
e
1.27
ddd
38/41
0.10
Rev. 1
Typ
0.050
0.004
M25P128
12
Part numbering
Part numbering
Table 17.
Ordering Information Scheme
Example:
M25P128
–
V MF 6 T
P
Device Type
M25P = Serial Flash Memory for Code Storage
Device Function
128 = 128Mit ( 16Mbx 8)
Operating Voltage
V = VCC = 2.7 to 3.6V
Package
MF = SO16 (300 mil width)
ME = VDFPN8 8x6mm (MLP8)
Device Grade
6 = Industrial temperature range, –40 to 85 °C.
Device tested with standard test flow
Option
blank = Standard Packing
T = Tape and Reel Packing
Plating Technology
P or G = ECOPACK® (RoHs compliant)
For a list of available options (speed, package, etc.) or for further information on any aspect
of this device, please contact your nearest ST Sales Office.
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.
Rev. 1
39/41
Revision history
13
M25P128
Revision history
Table 18.
Document Revision History
Date
Revision
02-May-2005
0.1
First issue.
09-Jun-2005
0.2
Table 2: Protected Area Sizes updated.
Memory capacity modified in Section 6.3: Read Identification (RDID).
0.3
Updated tPP values in Table 14: AC Characteristics and tVSL value in
Table 8: Power-Up Timing and VWI Threshold. Modified information
in Section 4.1: Page programming and Section 6.8: Page Program
(PP).
1
Document status promoted from Target specification to Preliminary
data.
Packages are ECOPACK® compliant. Blank option removed under
Plating Technology in Table 17. Read Electronic Signature (RES)
instruction removed. ICC1 parameter updated in Table 13: DC
Characteristics.
28-Aug-2005
20-Jan-2006
40/41
Changes
Rev. 1
M25P128
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2006 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
Rev. 1
41/41