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M95320 M95320-W M95320-R M95640 M95640-W M95640-R
32 Kbit and 64 Kbit serial SPI bus EEPROMs with high-speed clock
Features

Compatible with SPI bus serial interface (positive clock SPI modes) Single supply voltage: - 4.5 to 5.5 V for M95320 and M95640 - 2.5 to 5.5 V for M95320-W and M95640-W - 1.8 to 5.5 V for M95320-R and M95640-R 10 MHz, 5 MHz or 2 MHz clock rates 5 ms write time Status Register Hardware protection of the Status Register Byte and Page Write (up to 32 bytes) Self-timed programming cycle Adjustable size read-only EEPROM area Enhanced ESD protection More than 1 million Write cycles More than 40-year data retention Packages - ECOPACK(R) (RoHS compliant)
UFDFPN8 (MB) 2 x 3 mm TSSOP8 (DW) 169 mil width
SO8 (MN) 150 mil width

June 2008
Rev 10
1/46
www.st.com 1
Contents
M95320, M95640, M95320-x, M95640-x
Contents
1 2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Serial Data output (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Serial Data input (D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Serial Clock (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Chip Select (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Hold (HOLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Write Protect (W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 VSS ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 VCC supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
Connecting to the SPI bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 SPI modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4
Operating features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Supply voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1.1 4.1.2 4.1.3 4.1.4 Operating supply voltage VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 4.3 4.4
Active Power and Standby Power modes . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2.1 Hold condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Data protection and protocol control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 6
Memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1 6.2 6.3 Write Enable (WREN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Write Disable (WRDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Read Status Register (RDSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3.1 WIP bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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M95320, M95640, M95320-x, M95640-x 6.3.2 6.3.3 6.3.4
Contents
WEL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 BP1, BP0 bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 SRWD bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4 6.5 6.6
Write Status Register (WRSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Read from Memory Array (READ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Write to Memory Array (WRITE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7
Power-up and delivery state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1 7.2 Power-up state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Initial delivery state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8 9 10 11 12
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
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List of tables
M95320, M95640, M95320-x, M95640-x
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Write-protected block size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Instruction set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Status Register format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Protection modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Address range bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Operating conditions (M95320 and M95640) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Operating conditions (M95320-W and M95640-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Operating conditions (M95320-R and M95640-R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 DC characteristics (M95320 and M95640, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . 28 DC characteristics (M95320-W and M95640-W, device grade 6). . . . . . . . . . . . . . . . . . . . 29 DC characteristics (M95320-W and M95640-W, device grade 3). . . . . . . . . . . . . . . . . . . . 29 DC characteristics (M95320-R and M95640-R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 AC characteristics (M95320 and M95640, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . 31 AC characteristics (M95320-W and M95640-W, device grade 6). . . . . . . . . . . . . . . . . . . . 32 AC characteristics (M95320-W and M95640-W, device grade 3). . . . . . . . . . . . . . . . . . . . 33 AC characteristics (M95320-R). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 AC characteristics (M95640-R). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 SO8N - 8 lead plastic small outline, 150 mils body width, package mechanical data . . . . 38 TSSOP8 - 8 lead thin shrink small outline, package mechanical data. . . . . . . . . . . . . . . . 39 UFDFPN8 (MLP8) - 8-lead ultra thin fine pitch dual flat no lead, package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Available M95320x products (package, voltage range, temperature grade) . . . . . . . . . . . 42 Available M95640x products (package, voltage range, temperature grade) . . . . . . . . . . . 42 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
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M95320, M95640, M95320-x, M95640-x
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. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 pin package connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Bus master and memory devices on the SPI bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 SPI modes supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Hold condition activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Write Enable (WREN) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Write Disable (WRDI) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Read Status Register (RDSR) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Write Status Register (WRSR) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Read from Memory Array (READ) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Byte Write (WRITE) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Page Write (WRITE) sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Serial Input timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Hold timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Serial output timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 SO8N - 8 lead plastic small outline, 150 mils body width, package outline . . . . . . . . . . . . 38 TSSOP8 - 8 lead thin shrink small outline, package outline . . . . . . . . . . . . . . . . . . . . . . . 39 UFDFPN8 (MLP8) - 8-lead ultra thin fine pitch dual flat no lead, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
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Description
M95320, M95640, M95320-x, M95640-x
1
Description
The M95320, M95320-W, M95320-R, M95640, M95640-W and M95640-R are electrically erasable programmable memory (EEPROM) devices. They are accessed by a high-speed SPI-compatible bus. The M95320, M95320-W and M95320-R are 32 Kbit devices organized as 4096 x 8 bits. The M95640, M95640-W and M95640-R are 64 Kbit devices organized as 8192 x 8 bits. The device is accessed by a simple serial interface that is SPI-compatible. The bus signals are C, D and Q, as shown in Table 1 and Figure 1. The device is selected when Chip Select (S) is taken low. Communications with the device can be interrupted using Hold (HOLD). Figure 1. Logic diagram
VCC
D C S W HOLD M95xxx
Q
VSS
AI01789C
Figure 2.
8 pin package connections
M95xxx S Q W VSS 1 2 3 4 8 7 6 5
AI01790D
VCC HOLD C D
1. See Package mechanical data section for package dimensions and how to identify pin-1.
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M95320, M95640, M95320-x, M95640-x Table 1. Signal names
Signal name C D Q S W HOLD VCC VSS Serial Clock Serial data input Serial data output Chip Select Write Protect Hold Supply voltage Ground Description
Description
7/46
Signal description
M95320, M95640, M95320-x, M95640-x
2
Signal description
During all operations, VCC must be held stable and within the specified valid range: VCC(min) to VCC(max). All of the input and output signals must be held high or low (according to voltages of VIH, VOH, VIL or VOL, as specified in Table 13 to Table 16). These signals are described next.
2.1
Serial Data output (Q)
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 written. 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 Write 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.
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M95320, M95640, M95320-x, M95640-x
Signal description
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 Write instructions (as specified by the values in the BP1 and BP0 bits of the Status Register). This pin must be driven either high or low, and must be stable during all write operations.
2.7
VSS ground
VSS is the reference for the VCC supply voltage.
2.8
VCC supply voltage
Refer to Section 4.1: Supply voltage (VCC) on page 12.
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Connecting to the SPI bus
M95320, M95640, M95320-x, M95640-x
3
Connecting to the SPI bus
These devices are fully compatible with the SPI protocol. All instructions, addresses and input data bytes are shifted in to the device, most significant bit first. The Serial Data input (D) is sampled on the first rising edge of the Serial Clock (C) after Chip Select (S) goes low. All output data bytes are shifted out of the device, most significant bit first. The Serial Data output (Q) is latched on the first falling edge of the Serial Clock (C) after the instruction (such as the Read from Memory Array and Read Status Register instructions) have been clocked into the device. Figure 3 shows three devices, connected to an MCU, on a SPI bus. Only one device is selected at a time, so only one device drives the Serial Data output (Q) line at a time, all the others being high impedance. Figure 3. Bus master and memory devices on the SPI bus
VSS VCC R SDO SPI interface with (CPOL, CPHA) = (0, 0) or (1, 1) SDI SCK CQD SPI bus master R CS3 CS2 CS1 S W HOLD S W HOLD S W HOLD SPI memory device VCC VSS R SPI memory device CQD VCC VSS R SPI memory device CQD VCC VSS
AI12836b
1. The Write Protect (W) and Hold (HOLD) signals should be driven, high or low as appropriate.
The pull-up resistor R (represented in Figure 3) ensures that a device is not selected if the bus master leaves the S line in the high impedance state. In applications where the bus master might enter a state where all inputs/outputs SPI bus would be in high impedance at the same time (for example, if the bus master is reset during the transmission of an instruction), the clock line (C) must be connected to an external pulldown resistor so that, if all inputs/outputs become high impedance, the C line is pulled low (while the S line is pulled high): this will ensure that S and C do not become high at the same time, and so, that the tSHCH requirement is met. The typical value of R is 100 k .
10/46
M95320, M95640, M95320-x, M95640-x
Connecting to the SPI bus
3.1
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 4, is the clock polarity when the bus master is in Stand-by mode and not transferring data:

C remains at 0 for (CPOL=0, CPHA=0) C remains at 1 for (CPOL=1, CPHA=1) SPI modes supported
Figure 4.
CPOL CPHA
0
0
C
1
1
C
D
MSB
Q
MSB
AI01438B
11/46
Operating features
M95320, M95640, M95320-x, M95640-x
4
4.1
4.1.1
Operating features
Supply voltage (VCC)
Operating supply voltage VCC
Prior to selecting the memory and issuing instructions to it, a valid and stable VCC voltage within the specified [VCC(min), VCC(max)] range must be applied (see Table 8, Table 9 and Table 10). This voltage must remain stable and valid until the end of the transmission of the instruction and, for a Write instruction, until the completion of the internal write cycle (tW). In order to secure a stable DC supply voltage, it is recommended to decouple the VCC line with a suitable capacitor (usually of the order of 10 nF to 100 nF) close to the VCC/VSS package pins.
4.1.2
Device reset
In order to prevent inadvertent Write operations during power-up, a power-on-reset (POR) circuit is included. At power-up, the device does not respond to any instruction until VCC reaches the POR threshold voltage (this threshold is lower than the minimum VCC operating voltage defined in Table 8, Table 9 and Table 10). When VCC passes over the POR threshold, the device is reset and in the following state:

in the Standby Power mode deselected (note that when the device is deselected it is necessary to apply a falling edge on Chip Select (S) prior to issuing any new instruction, otherwise the instruction is not executed) Status register values: - - - the Write Enable Latch (WEL) bit is reset to 0 the Write In Progress (WIP) bit is reset to 0 the SRWD, BP1 and BP0 bits remain unchanged (non-volatile bits).
4.1.3
Power-up conditions
When the power supply is turned on, VCC continuously rises from VSS to VCC. During this time, the Chip Select (S) line is not allowed to float but should follow the VCC voltage, it is therefore recommended to connect the S line to VCC via a suitable pull-up resistor (see Figure 3). In addition, the Chip Select (S) input offers a built-in safety feature, as the S input is edgesensitive as well as level-sensitive: after power-up, the device does not become selected until a falling edge has first been detected on Chip Select (S). This ensures that Chip Select (S) must have been high, prior to going low to start the first operation. The VCC rise time must not vary faster than 1 V/s. Important note: When VCC passes over the POR threshold (see Section 4.1.2: Device reset), the device is reset and enters the Standby Power mode. However, the device must not be accessed until VCC reaches a valid and stable VCC voltage within the specified [VCC(min), VCC(max)] ranges defined in Table 8, Table 9 and Table 10.
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M95320, M95640, M95320-x, M95640-x
Operating features
4.1.4
Power-down
At power-down (continuous decrease in VCC below the minimum VCC operating voltage defined in Table 8, Table 9 and Table 10), the device must be:

deselected (Chip Select (S) should be allowed to follow the voltage applied on VCC) in Standby Power mode (that is there should not be any internal write cycle in progress).
4.2
Active Power and Standby Power modes
When Chip Select (S) is low, the device is selected, and in the Active Power mode. The device consumes ICC, as specified in Table 13 to Table 16. When Chip Select (S) is high, the device is deselected. If a Write cycle is not currently in progress, the device then goes in to the Standby Power mode, and the device consumption drops to ICC1.
4.2.1
Hold condition
The Hold (HOLD) signal is used to pause any serial communications with the device without resetting the clocking sequence. 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 enter the Hold condition, the device must be selected, with Chip Select (S) low. Normally, the device is kept selected, for the whole duration of the Hold condition. Deselecting the device while it is in the Hold condition, has the effect of resetting the state of the device, and this mechanism can be used if it is required to reset any processes that had been in progress. The Hold condition starts when the Hold (HOLD) signal is driven low at the same time as Serial Clock (C) already being low (as shown in Figure 5). The Hold condition ends when the Hold (HOLD) signal is driven high at the same time as Serial Clock (C) already being low. Figure 5 also shows what happens if the rising and falling edges are not timed to coincide with Serial Clock (C) being low. Figure 5. Hold condition activation
C
HOLD
Hold Condition
Hold Condition
AI02029D
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Operating features
M95320, M95640, M95320-x, M95640-x
4.3
Status Register
Figure 6 shows the position of the Status Register in the control logic of the device. The Status Register contains a number of status and control bits that can be read or set (as appropriate) by specific instructions. See Section 6.3: Read Status Register (RDSR) for a detailed description of the Status Register bits.
4.4
Data protection and protocol control
Non-volatile memory devices can be used in environments that are particularly noisy, and within applications that could experience problems if memory bytes are corrupted. Consequently, the device features the following data protection mechanisms:

Write 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 Write (WRITE) instruction completion

The Block Protect (BP1, BP0) bits in the Status Register allow part of the memory to be configured as read-only. The Write Protect (W) signal allows the Block Protect (BP1, BP0) bits of the Status Register to be protected.
For any instruction to be accepted, and executed, Chip Select (S) must be driven high after the rising edge of Serial Clock (C) for the last bit of the instruction, and before the next rising edge of Serial Clock (C). Two points need to be noted in the previous sentence:
The `last bit of the instruction' can be the eighth bit of the instruction code, or the eighth bit of a data byte, depending on the instruction (except for Read Status Register (RDSR) and Read (READ) instructions). The `next rising edge of Serial Clock (C)' might (or might not) be the next bus transaction for some other device on the SPI bus. Write-protected block size
Array addresses protected Protected block BP1 0 0 1 1 BP0 0 1 0 1 none Upper quarter Upper half Whole memory 64 Kbit devices none 1800h - 1FFFh 1000h - 1FFFh 0000h - 1FFFh 32 Kbit devices none 0C00h - 0FFFh 0800h - 0FFFh 0000h - 0FFFh
Table 2.
Status Register bits
14/46
M95320, M95640, M95320-x, M95640-x
Memory organization
5
Memory organization
The memory is organized as shown in Figure 6. Figure 6.
HOLD W S C D Q Control Logic
Block diagram
High Voltage Generator
I/O Shift Register
Address Register and Counter
Data Register Status Register
Size of the Read only EEPROM area
Y Decoder
1 Page
X Decoder
AI01272C
15/46
Instructions
M95320, M95640, M95320-x, M95640-x
6
Instructions
Each instruction starts with a single-byte code, as summarized in Table 3. If an invalid instruction is sent (one not contained in Table 3.), the device automatically deselects itself. Table 3. Instruction set
Description Write Enable Write Disable Read Status Register Write Status Register Read from Memory Array Write to Memory Array Instruction format 0000 0110 0000 0100 0000 0101 0000 0001 0000 0011 0000 0010
Instruction WREN WRDI RDSR WRSR READ WRITE
6.1
Write Enable (WREN)
The Write Enable Latch (WEL) bit must be set prior to each WRITE and WRSR instruction. The only way to do this is to send a Write Enable instruction to the device. As shown in Figure 7, to send this instruction to the device, Chip Select (S) is driven low, and the bits of the instruction byte are shifted in, on Serial Data Input (D). The device then enters a wait state. It waits for a the device to be deselected, by Chip Select (S) being driven high. Figure 7. Write Enable (WREN) sequence
S 0 C Instruction D High Impedance Q
AI02281E
1
2
3
4
5
6
7
16/46
M95320, M95640, M95320-x, M95640-x
Instructions
6.2
Write Disable (WRDI)
One way of resetting the Write Enable Latch (WEL) bit is to send a Write Disable instruction to the device. As shown in Figure 8, to send this instruction to the device, Chip Select (S) is driven low, and the bits of the instruction byte are shifted in, on Serial Data Input (D). The device then enters a wait state. It waits for a the device to be deselected, by Chip Select (S) being driven high. The Write Enable Latch (WEL) bit, in fact, becomes reset by any of the following events:

Power-up WRDI instruction execution WRSR instruction completion WRITE instruction completion. Write Disable (WRDI) sequence
Figure 8.
S 0 C Instruction D High Impedance Q
AI03750D
1
2
3
4
5
6
7
17/46
Instructions
M95320, M95640, M95320-x, M95640-x
6.3
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 Write 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 9. The Status Register format is shown in Table 4 and the status and control bits of the Status Register are as follows:
6.3.1
WIP bit
The Write In Progress (WIP) bit indicates whether the memory is busy with a Write or Write Status Register cycle. When set to 1, such a cycle is in progress, when reset to 0 no such cycle is in progress.
6.3.2
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 or Write Status Register instruction is accepted.
6.3.3
BP1, BP0 bits
The Block Protect (BP1, BP0) bits are non-volatile. They define the size of the area to be software protected against Write instructions. These bits are written with the Write Status Register (WRSR) instruction. When one or both of the Block Protect (BP1, BP0) bits is set to 1, the relevant memory area (as defined in Table 4) becomes protected against Write (WRITE) instructions. The Block Protect (BP1, BP0) bits can be written provided that the Hardware Protected mode has not been set.
6.3.4
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, BP1, BP0) become read-only bits and the Write Status Register (WRSR) instruction is no longer accepted for execution. Table 4.
b7 SRWD 0 0 0 BP1 BP0 WEL
Status Register format
b0 WIP
Status Register Write Protect Block Protect bits Write Enable Latch bit Write In Progress bit
18/46
M95320, M95640, M95320-x, M95640-x Figure 9.
S 0 C Instruction D Status Register Out High Impedance Q 7 MSB 6 5 4 3 2 1 0 7 MSB 6 5 4 3 2 1 Status Register Out 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Instructions
Read Status Register (RDSR) sequence
0
7
AI02031E
6.4
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 10. The Write Status Register (WRSR) instruction has no effect on b6, b5, b4, b1 and b0 of the Status Register. b6, b5 and b4 are always read as 0. Chip Select (S) must be driven high after the rising edge of Serial Clock (C) that latches in the eighth bit of the data byte, and before the next rising edge of Serial Clock (C). Otherwise, 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 (BP1, BP0) bits, to define the size of the area that is to be treated as readonly, as defined in Table 4. 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. The contents of the Status Register Write Disable (SRWD) and Block Protect (BP1, BP0) bits are frozen at their current values from just before the start of the execution of Write Status Register (WRSR) instruction. The new, updated, values take effect at the moment of completion of the execution of Write Status Register (WRSR) instruction.
19/46
Instructions Table 5. Protection modes
Mode Write protection of the Status Register
M95320, M95640, M95320-x, M95640-x
W SRWD signal bit 1 0 1 0 0 1
Memory content Protected area(1) Unprotected area(1)
Status Register is Writable Software (if the WREN instruction has Protected set the WEL bit) Write Protected (SPM) The values in the BP1 and BP0 bits can be changed Status Register is Hardware Hardware write protected Protected Write Protected (HPM) The values in the BP1 and BP0 bits cannot be changed
Ready to accept Write instructions
0
1
Ready to accept Write instructions
1. As defined by the values in the Block Protect (BP1, BP0) bits of the Status Register, as shown in Table 2.
The protection features of the device are summarized in Table 2. 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 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 (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 (BP1, BP0) bits of the Status Register, can be used.
20/46
M95320, M95640, M95320-x, M95640-x Table 6. Address range bits(1)
32 Kbit devices A11-A0
Instructions
Device Address bits
64 Kbit devices A12-A0
1. b15 to b13 are Don't Care on the 64 Kbit devices. b15 to b12 are Don't Care on the 32 Kbit devices.
Figure 10. Write Status Register (WRSR) sequence
S 0 C Instruction Status Register In 7 High Impedance Q
AI02282D
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
D
6
5
4
3
2
1
0
MSB
21/46
Instructions
M95320, M95640, M95320-x, M95640-x
6.5
Read from Memory Array (READ)
As shown in Figure 11, to send this instruction to the device, Chip Select (S) is first driven low. The bits of the instruction byte and address bytes are then shifted in, on Serial Data Input (D). The address is loaded into an internal address register, and the byte of data at that address is shifted out, on Serial Data Output (Q). If Chip Select (S) continues to be driven low, the internal address register is automatically incremented, and the byte of data at the new address is shifted out. When the highest address is reached, the address counter rolls over to zero, allowing the Read cycle to be continued indefinitely. The whole memory can, therefore, be read with a single READ instruction. The Read cycle is terminated by driving Chip Select (S) high. The rising edge of the Chip Select (S) signal can occur at any time during the cycle. The first byte addressed can be any byte within any page. The instruction is not accepted, and is not executed, if a Write cycle is currently in progress. Figure 11. Read from Memory Array (READ) sequence
S 0 C Instruction 16-Bit Address 1 2 3 4 5 6 7 8 9 10 20 21 22 23 24 25 26 27 28 29 30 31
D High Impedance Q
15 14 13 MSB
3
2
1
0 Data Out 1 7 6 5 4 3 2 1 0 Data Out 2 7
MSB
AI01793D
1. Depending on the memory size, as shown in Table 6, the most significant address bits are Don't Care.
22/46
M95320, M95640, M95320-x, M95640-x
Instructions
6.6
Write to Memory Array (WRITE)
As shown in Figure 12, to send this instruction to the device, Chip Select (S) is first driven low. The bits of the instruction byte, address byte, and at least one data byte are then shifted in, on Serial Data Input (D). The instruction is terminated by driving Chip Select (S) high at a byte boundary of the input data. In the case of Figure 12, this occurs after the eighth bit of the data byte has been latched in, indicating that the instruction is being used to write a single byte. The self-timed Write cycle starts from the rising edge of Chip Select (S), and continues for a period tWC (as specified in Table 18 to Table 20), at the end of which the Write in Progress (WIP) bit is reset to 0. If, though, Chip Select (S) continues to be driven low, as shown in Figure 13, the next byte of input data is shifted in, so that more than a single byte, starting from the given address towards the end of the same page, can be written in a single internal Write cycle. Each time a new data byte is shifted in, the least significant bits of the internal address counter are incremented. If the number of data bytes sent to the device exceeds the page boundary, the internal address counter rolls over to the beginning of the page, and the previous data there are overwritten with the incoming data. (The page size of these devices is 32 bytes). The instruction is not accepted, and is not executed, under the following conditions:

if the Write Enable Latch (WEL) bit has not been set to 1 (by executing a Write Enable instruction just before) if a Write cycle is already in progress if the device has not been deselected, by Chip Select (S) being driven high, at a byte boundary (after the eighth bit, b0, of the last data byte that has been latched in) if the addressed page is in the region protected by the Block Protect (BP1 and BP0) bits.
Figure 12. Byte Write (WRITE) sequence
S 0 C Instruction 16-Bit Address Data Byte 1 2 3 4 5 6 7 8 9 10 20 21 22 23 24 25 26 27 28 29 30 31
D High Impedance Q
15 14 13
3
2
1
0
7
6
5
4
3
2
1
0
AI01795D
1. Depending on the memory size, as shown in Table 6, the most significant address bits are Don't Care.
23/46
Instructions Figure 13. Page Write (WRITE) sequence
S 0 C Instruction 1 2 3 4 5 6 7 8 9 10
M95320, M95640, M95320-x, M95640-x
20 21 22 23 24 25 26 27 28 29 30 31
16-Bit Address
Data Byte 1
D
15 14 13
3
2
1
0
7
6
5
4
3
2
1
0
S 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 C Data Byte 2 Data Byte 3 Data Byte N
D
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
6
5
4
3
2
1
0
AI01796D
1. Depending on the memory size, as shown in Table 6, the most significant address bits are Don't Care.
24/46
M95320, M95640, M95320-x, M95640-x
Power-up and delivery state
7
7.1
Power-up and delivery state
Power-up state
After Power-up, the device is in the following state:

Standby Power mode deselected (after power-up, a falling edge is required on Chip Select (S) before any instructions can be started). not in the Hold condition the Write Enable Latch (WEL) is reset to 0 Write In Progress (WIP) is reset to 0
The SRWD, BP1 and BP0 bits of the Status Register are unchanged from the previous power-down (they are non-volatile bits).
7.2
Initial delivery state
The device is delivered with the memory array set at all 1s (FFh). The Status Register Write Disable (SRWD) and Block Protect (BP1 and BP0) bits are initialized to 0.
25/46
Maximum rating
M95320, M95640, M95320-x, M95640-x
8
Maximum rating
Stressing the device outside the ratings listed in Table 7 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 7.
Symbol TSTG TA TLEAD VO VI VCC VESD Storage temperature Ambient operating temperature Lead temperature during soldering Output voltage Input voltage Supply voltage Electrostatic discharge voltage (human body model)(2)
Absolute maximum ratings
Parameter Min. -65 -40 See -0.50 -0.50 -0.50 -4000 Max. 150 130 note (1) VCC+0.6 6.5 6.5 4000 Unit C C C V V V V
1. Compliant with JEDEC Std J-STD-020C (for small body, Sn-Pb or Pb assembly), the ST ECOPACK(R) 7191395 specification, and the European directive on Restrictions on Hazardous Substances (RoHS) 2002/95/EU 2. AEC-Q100-002 (compliant with JEDEC Std JESD22-A114, C1 = 100 pF, R1 = 1500 , R2 = 500 )
26/46
M95320, M95640, M95320-x, M95640-x
DC and AC parameters
9
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 8.
Symbol VCC TA Supply voltage Ambient operating temperature (device grade 3)
Operating conditions (M95320 and M95640)
Parameter Min. 4.5 -40 Max. 5.5 125 Unit V C
Table 9.
Symbol VCC TA
Operating conditions (M95320-W and M95640-W)
Parameter Supply voltage Ambient operating temperature (device grade 6) Ambient operating temperature (device grade 3) Min. 2.5 -40 -40 Max. 5.5 85 125 Unit V C C
Table 10.
Symbol VCC TA
Operating conditions (M95320-R and M95640-R)
Parameter Supply voltage Ambient operating temperature Min.(1) 1.8 -40 Max. (1) 5.5 85 Unit V C
1. This product is under development. For more information, please contact your nearest ST sales office.
Table 11.
Symbol CL
AC measurement conditions(1)
Parameter Load capacitance Input rise and fall times Input pulse voltages Input and output timing reference voltages Min. Typ. 30 50 0.2VCC to 0.8VCC 0.3VCC to 0.7VCC Max. Unit pF ns V V
1. Output Hi-Z is defined as the point where data out is no longer driven.
Figure 14. AC measurement I/O waveform
Input Levels 0.8VCC Input and Output Timing Reference Levels 0.7VCC 0.3VCC
AI00825B
0.2VCC
27/46
DC and AC parameters Table 12.
Symbol COUT CIN
M95320, M95640, M95320-x, M95640-x Capacitance(1)
Parameter Test condition VOUT = 0 V VIN = 0 V VIN = 0 V Min. Max. 8 8 6 Unit pF pF pF
Output capacitance (Q) Input capacitance (D) Input capacitance (other pins)
1. Sampled only, not 100% tested, at TA=25C and a frequency of 5MHz.
Table 13.
Symbol ILI ILO ICC ICC1 VIL VIH VOL(1) VOH
(1)
DC characteristics (M95320 and M95640, device grade 3)
Parameter Input leakage current Output leakage current Supply current Supply current (Standby) Input low voltage Input high voltage Output low voltage Output high voltage IOL = 2 mA, VCC = 5 V IOH = -2 mA, VCC = 5 V 0.8 VCC Test condition VIN = VSS or VCC S = VCC, VOUT = VSS or VCC C = 0.1VCC/0.9VCC at 5 MHz, VCC = 5V, Q = open S = VCC, VCC = 5 V, VIN = VSS or VCC -0.45 0.7 VCC Min. Max. 2 2 4 5 0.3 VCC VCC+1 0.4 Unit A A mA A V V V V
1. For all 5V range devices, the device meets the output requirements for both TTL and CMOS standards.
28/46
M95320, M95640, M95320-x, M95640-x Table 14.
Symbol ILI ILO
DC and AC parameters
DC characteristics (M95320-W and M95640-W, device grade 6)
Parameter Input leakage current Output leakage current Test condition VIN = VSS or VCC S = VCC, VOUT = VSS or VCC C = 0.1VCC/0.9VCC at 5 MHz, VCC = 2.5 V, Q = open C = 0.1VCC/0.9VCC at 10 MHz, VCC = 3.0 V, Q = open Supply current (Standby) S = VCC, VCC = 2.5 V VIN = VSS or VCC S = VCC, VCC = 5.0 V VIN = VSS or VCC -0.45 0.7VCC IOL = 1.5 mA, VCC = 2.5 V or IOL = 2 mA, VCC = 5.5 V IOH = -0.4 mA, VCC = 2.5 V or IOH = -2 mA, VCC = 5.5 V 0.8VCC Min. Max. 2 2 3 4 1 2 0.3VCC VCC+1 0.4 Unit A A mA mA A A V V V V
ICC
Supply current
ICC1
VIL VIH VOL VOH
Input low voltage Input high voltage Output low voltage Output high voltage
Table 15.
Symbol ILI ILO ICC ICC1 VIL VIH VOL VOH
DC characteristics (M95320-W and M95640-W, device grade 3)
Parameter Input leakage current Output leakage current Supply current Test condition VIN = VSS or VCC S = VCC, VOUT = VSS or VCC C = 0.1VCC/0.9VCC at 5 MHz, VCC = 2.5 V, Q = open Min. Max. 2 2 3 2 -0.45 0.3VCC Unit A A mA A V V V V
Supply current (Standby) S = VCC, VCC = 2.5 V, VIN = VSS or VCC Input low voltage Input high voltage Output low voltage Output high voltage IOL = 1.5 mA, VCC = 2.5 V IOH = -0.4 mA, VCC = 2.5 V 0.8VCC
0.7VCC VCC+1 0.4
29/46
DC and AC parameters Table 16.
Symbol ILI ILO
M95320, M95640, M95320-x, M95640-x DC characteristics (M95320-R and M95640-R)
Parameter Test condition VIN = VSS or VCC S = VCC, voltage applied on Q = VSS or VCC VCC = 2.5 V, C = 0.1VCC/0.9VCC at maximum clock frequency, Q = open Min. Max. 2 2 Unit A A
Input leakage current Output leakage current
3
mA
ICCR
Supply current (Read) VCC = 1.8 V, C = 0.1VCC/0.9VCC at maximum clock frequency, Q = open VCC = 5 V, S = VCC, VIN = VSS or VCC 2 mA
2 1 1 -0.45 -0.45 0.75VCC 0.7 VCC 0.25VCC 0.3VCC VCC+1 VCC+1 0.2VCC 0.3 0.8 VCC
A A A V V V V V V V
ICC1
Supply current (Standby)
VCC = 2.5 V, S = VCC, VIN = VSS or VCC VCC = 1.8 V, S = VCC, VIN = VSS or VCC
VIL
Input low voltage
1.8 V < VCC < 2.5 V 2.5 V < VCC < 5.5 V
VIH
Input high voltage
1.8 V < VCC < 2.5 V 2.5 V < VCC < 5.5 V
VOL
Output low voltage
VCC = 2.5 V, IOL = 1.5 mA or VCC = 5.5 V, IOL = 2 mA VCC = 1.8 V, IOL = 0.15 mA
VOH
Output high voltage
VCC = 2.5 V, IOH = -0.4 mA or VCC = 5.5 V, IOH = -2 mA or VCC = 1.8 V, IOH = -0.1 mA
30/46
M95320, M95640, M95320-x, M95640-x Table 17. AC characteristics (M95320 and M95640, device grade 3)
Test conditions specified in Table 10 and Table 11 Symbol fC tSLCH tSHCH tSHSL tCHSH tCHSL tCH(2) tCL(2) tCLCH tCHCL
(3) (3)
DC and AC parameters
Alt. fSCK tCSS1 tCSS2 tCS tCSH Clock frequency
Parameter
Min. D.C. 90 90 100 90 90 90 90
Max. 5
Min.(1) D.C. 30 30 40 30 30 42 40
Max.(1) 10
Unit MHz ns ns ns ns ns ns ns
S active setup time S not active setup time S deselect time S active hold time S not active hold time
tCLH tCLL tRC tFC tDSU tDH
Clock high time Clock low time Clock rise time Clock fall time Data in setup time Data in hold time Clock low hold time after HOLD not active Clock low hold time after HOLD active Clock low set-up time before HOLD active Clock low set-up time before HOLD not active
1 1 20 30 70 40 0 0 100 60 0 50 50 50 100 5 0 10 10 30 30 0 0
2 2
s s ns ns ns ns ns ns
tDVCH tCHDX tHHCH tHLCH tCLHL tCLHH tSHQZ(3) tCLQV tCLQX tQLQH
(3)
tDIS tV tHO tRO tFO tLZ tHZ tWC
Output disable time Clock low to output valid Output hold time Output rise time Output fall time HOLD high to output valid HOLD low to output high-Z Write time
40 40
ns ns ns
40 40 40 40 5
ns ns ns ns ms
tQHQL(3) tHHQV tHLQZ tW
(3)
1. These timings are offered with grade3 devices referenced with "PB" process letters only (see the last digits in the Part numbering). 2. tCH + tCL must never be lower than the shortest possible clock period, 1/fC(max). 3. Value guaranteed by characterization, not 100% tested in production.
31/46
DC and AC parameters Table 18.
M95320, M95640, M95320-x, M95640-x AC characteristics (M95320-W and M95640-W, device grade 6)
Test conditions specified in Table 11 and Table 9
Symbol fC tSLCH tSHCH tSHSL tCHSH tCHSL tCH(1) tCL(1) tCLCH tCHCL
(2) (2)
Alt. fSCK tCSS1 tCSS2 tCS tCSH Clock frequency S active setup time
Parameter
Min. D.C. 30 30 40 30 30 42 40
Max. 10
Unit MHz ns ns ns ns ns ns ns
S not active setup time S deselect time S active hold time S not active hold time
tCLH tCLL tRC tFC tDSU tDH
Clock high time Clock low time Clock rise time Clock fall time Data in setup time Data in hold time Clock low hold time after HOLD not active Clock low hold time after HOLD active Clock low set-up time before HOLD active Clock low set-up time before HOLD not active
2 2 10 10 30 30 0 0 40 40 0 40 40 40 40 5
s s ns ns ns ns ns ns ns ns ns ns ns ns ns ms
tDVCH tCHDX tHHCH tHLCH tCLHL tCLHH tSHQZ(2) tCLQV tCLQX tQLQH
(2)
tDIS tV tHO tRO tFO tLZ tHZ tWC
Output disable time Clock low to output valid Output hold time Output rise time Output fall time HOLD high to output valid HOLD low to output high-Z Write time
tQHQL(2) tHHQV tHLQZ tW
(2)
1. tCH + tCL must never be lower than the shortest possible clock period, 1/fC(max). 2. Value guaranteed by characterization, not 100% tested in production.
32/46
M95320, M95640, M95320-x, M95640-x Table 19. AC characteristics (M95320-W and M95640-W, device grade 3)
Test conditions specified in Table 11 and Table 9 2.5 V to 5.5 V Symbol fC tSLCH tSHCH tSHSL tCHSH tCHSL tCH
(2)
DC and AC parameters
3.0 V to 5.5 V(1) Unit Min. D.C. 30 30 40 30 30 42 40 Max. 10 MHz ns ns ns ns ns ns ns 2 2 10 10 30 30 0 0 s s ns ns ns ns ns ns 40 40 0 ns ns ns 40 40 40 40 5 ns ns ns ns ms
Alt. fSCK Clock frequency
Parameter Min. D.C. 90 90 100 90 90 90 90 1 1 20 30 70 40 0 0 100 60 0 50 50 50 100 5 Max. 5
tCSS1 S active setup time tCSS2 S not active setup time tCS tCSH S deselect time S active hold time S not active hold time tCLH tCLL tRC tFC tDSU tDH Clock high time Clock low time Clock rise time Clock fall time Data in setup time Data in hold time Clock low hold time after HOLD not active Clock low hold time after HOLD active Clock low set-up time before HOLD active Clock low set-up time before HOLD not active tDIS tV tHO tRO tFO tLZ tHZ tWC Output disable time Clock low to output valid Output hold time Output rise time Output fall time HOLD high to output valid HOLD low to output high-Z Write time
tCL(2) tCLCH(3) tCHCL(3) tDVCH tCHDX tHHCH tHLCH tCLHL tCLHH tSHQZ
(3)
tCLQV tCLQX tQLQH(3) tQHQL(3) tHHQV tHLQZ(3) tW
1. These timings are offered with grade3 devices referenced with "/PB" process letters only (see the last digits in the Part numbering). 2. tCH + tCL must never be lower than the shortest possible clock period, 1/fC(max). 3. Value guaranteed by characterization, not 100% tested in production.
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DC and AC parameters Table 20. AC characteristics (M95320-R)
M95320, M95640, M95320-x, M95640-x
Test conditions specified in Table 11 and Table 10 Symbol fC tSLCH tSHCH tSHSL tCHSH tCHSL tCH(1) tCL(1) tCLCH tCHCL
(2) (2)
Alt. fSCK tCSS1 tCSS2 tCS tCSH Clock frequency
Parameter
Min. D.C. 60 60 90 60 60 90 90
Max. 5
Unit MHz ns ns ns ns ns ns ns
S active setup time S not active setup time S deselect time S active hold time S not active hold time
tCLH tCLL tRC tFC tDSU tDH
Clock high time Clock low time Clock rise time Clock fall time Data in setup time Data in hold time Clock low hold time after HOLD not active Clock low hold time after HOLD active Clock low set-up time before HOLD active Clock low set-up time before HOLD not active
2 2 20 20 60 60 0 0 80 80 0 80 80 80 80 5
s s ns ns ns ns 0 0 ns ns ns ns ns ns ns ms
tDVCH tCHDX tHHCH tHLCH tCLHL tCLHH tSHQZ(2) tCLQV tCLQX tQLQH tQHQL
(2) (2)
tDIS tV tHO tRO tFO tLZ tHZ tWC
Output disable time Clock low to output valid Output hold time Output rise time Output fall time HOLD high to output valid HOLD low to output high-Z Write time
tHHQV tHLQZ(2) tW
1. tCH + tCL must never be lower than the shortest possible clock period, 1/fC(max). 2. Value guaranteed by characterization, not 100% tested in production.
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M95320, M95640, M95320-x, M95640-x Table 21. AC characteristics (M95640-R)
DC and AC parameters
Test conditions specified in Table 10 and Table 11 Symbol fC tSLCH tSHCH tSHSL tCHSH tCHSL tCH(1) tCL(1) tCLCH(2) tCHCL
(2)
Alt. fSCK tCSS1 tCSS2 tCS tCSH Clock frequency
Parameter
Min. D.C. 150 150 200 150 150 200 200
Max. 2
Unit MHz ns ns ns ns ns ns ns
S active setup time S not active setup time S deselect time S active hold time S not active hold time
tCLH tCLL tRC tFC tDSU tDH
Clock high time Clock low time Clock rise time Clock fall time Data in setup time Data in hold time Clock low hold time after HOLD not active Clock low hold time after HOLD active Clock low set-up time before HOLD active Clock low set-up time before HOLD not active
2 2 50 50 150 150 0 0 200 200 0 200 200 200 200 5
s s ns ns ns ns 0 0 ns ns ns ns ns ns ns ms
tDVCH tCHDX tHHCH tHLCH tCLHL tCLHH tSHQZ(2) tCLQV tCLQX tQLQH(2) tQHQL(2) tHHQV tHLQZ(2) tW
tDIS tV tHO tRO tFO tLZ tHZ tWC
Output disable time Clock low to output valid Output hold time Output rise time Output fall time HOLD high to output valid HOLD low to output high-Z Write time
1. tCH + tCL must never be lower than the shortest possible clock period, 1/fC(max). 2. Value guaranteed by characterization, not 100% tested in production.
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DC and AC parameters Figure 15. Serial Input timing
M95320, M95640, M95320-x, M95640-x
tSHSL S tCHSL C tDVCH tCHCL tCHDX D MSB IN LSB IN tCL tCLCH tSLCH tCH tCHSH tSHCH
Q
High impedance
AI01447d
Figure 16. Hold timing
S tHLCH tCLHL C tCLHH tHLQZ Q tHHQV tHHCH
HOLD
AI01448c
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M95320, M95640, M95320-x, M95640-x Figure 17. Serial output timing
S tCH C tCLQV tCLQX Q tQLQH tQHQL D LSB IN
ADDR
DC and AC parameters
tSHSL
tCLCH
tCHCL
tCL
tSHQZ
AI01449f
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Package mechanical data
M95320, M95640, M95320-x, M95640-x
10
Package mechanical data
In order to meet environmental requirements, ST offers the M95640 in ECOPACK(R) packages. These packages have a lead-free second level interconnect. 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. ECOPACK is an ST trademark. ECOPACK specifications are available at www.st.com. Figure 18. SO8N - 8 lead plastic small outline, 150 mils body width, package outline
h x 45 A2 b e 0.25 mm GAUGE PLANE k
8
A ccc c
D
E1
1
E A1 L L1
SO-A
1. Drawing is not to scale.
Table 22.
SO8N - 8 lead plastic small outline, 150 mils body width, package mechanical data
millimeters inches(1) Max 1.75 0.10 1.25 0.28 0.17 0.48 0.23 0.10 4.90 6.00 3.90 1.27 4.80 5.80 3.80 - 0.25 0 0.40 1.04 5.00 6.20 4.00 - 0.50 8 1.27 0.0409 0.1929 0.2362 0.1535 0.05 0.189 0.2283 0.1496 0.0098 0 0.0157 0.25 0.0039 0.0492 0.011 0.0067 0.0189 0.0091 0.0039 0.1969 0.2441 0.1575 0.0197 8 0.05 Typ Min Max 0.0689 0.0098
Symbol Typ A A1 A2 b c ccc D E E1 e h k L L1 Min
1. Values in inches are converted from mm and rounded to 4 decimal digits.
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M95320, M95640, M95320-x, M95640-x
Package mechanical data
Figure 19. TSSOP8 - 8 lead thin shrink small outline, package outline
D
8
5
c
E1 E
1
4
A1 A CP b e A2
L L1
TSSOP8AM
1. Drawing is not to scale.
Table 23.
Symbol
TSSOP8 - 8 lead thin shrink small outline, package mechanical data
millimeters Typ. Min. Max. 1.200 0.050 1.000 0.800 0.190 0.090 0.150 1.050 0.300 0.200 0.100 3.000 0.650 6.400 4.400 0.600 1.000 0 8 2.900 - 6.200 4.300 0.450 3.100 - 6.600 4.500 0.750 0.1181 0.0256 0.2520 0.1732 0.0236 0.0394 0 8 0.1142 - 0.2441 0.1693 0.0177 0.0394 0.0020 0.0315 0.0075 0.0035 Typ. inches(1) Min. Max. 0.0472 0.0059 0.0413 0.0118 0.0079 0.0039 0.1220 - 0.2598 0.1772 0.0295
A A1 A2 b c CP D e E E1 L L1
1. Values in inches are converted from mm and rounded to 4 decimal digits.
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Package mechanical data
M95320, M95640, M95320-x, M95640-x
Figure 20. UFDFPN8 (MLP8) - 8-lead ultra thin fine pitch dual flat no lead, package outline
D L3 e b L1
E
E2
L A D2 ddd A1
UFDFPN-01
1. Drawing is not to scale.
Table 24.
UFDFPN8 (MLP8) - 8-lead ultra thin fine pitch dual flat no lead, package mechanical data
millimeters inches(1) Max 0.6 0.05 0.3 2.1 1.7 3.1 0.3 0.5 0.15 0.3 0.08 0.0118 0.08 Typ 0.0217 0.0008 0.0098 0.0787 0.063 0.1181 0.0079 0.0197 0.0177 Min 0.0177 0 0.0079 0.0748 0.0591 0.1142 0.0039 0.0157 Max 0.0236 0.002 0.0118 0.0827 0.0669 0.122 0.0118 0.0197 0.0059
Symbol Typ A A1 b D D2 E E2 e L L1 L3 ddd(2) 0.55 0.02 0.25 2 1.6 3 0.2 0.5 0.45 Min 0.45 0 0.2 1.9 1.5 2.9 0.1 0.4
1. Values in inches are converted from mm and rounded to 4 decimal digits. 2. Applied for exposed die paddle and terminals. Exclude embedding part of exposed die paddle from measurement.
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M95320, M95640, M95320-x, M95640-x
Part numbering
11
Part numbering
Table 25.
Example: Device type M95 = SPI serial access EEPROM Device function 640 = 64 Kbit (8192 x 8) 320 = 32 Kbit (4096 x 8) Operating voltage blank = VCC = 4.5 to 5.5 V W = VCC = 2.5 to 5.5 V R = VCC = 1.8 to 5.5 V Package MN = SO8 (150 mils width) DW = TSSOP8 (169 mils width) MB = MLP8 (2x3 mm) Device grade 6 = Industrial temperature range, -40 to 85 C. Device tested with standard test flow 3 = Device tested with high reliability certified flow(1)automotive temperature range (-40 to 125 C) Option blank = Standard Packing T = Tape and Reel Packing Plating technology P or G = ECOPACK (RoHS compliant) Process letter(2) /P or /PB = DP26% Chartered
1. ST strongly recommends the use of the Automotive Grade devices for use in an automotive environment. The high reliability certified flow (HRCF) is described in the quality note QNEE9801. Please ask your nearest ST sales office for a copy. 2. The Process letter only concerns Grade-3 devices.
Ordering information scheme
M95640 - W MN 6 T P /P
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.
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Part numbering Table 26.
M95320, M95640, M95320-x, M95640-x Available M95320x products (package, voltage range, temperature grade) M95320
4.5 V to 5.5 V Range 3 M95320-W 2.5 V to 5.5 V Range 6 Range 3 Range 6 Range 3 M95320-R 1.8 V to 5.5 V Range 6 Range 6 Range 6
Package
SO8 (MN) TSSOP (DW) MLP 2 x 3 mm (MB)
Table 27.
Available M95640x products (package, voltage range, temperature grade)
M95640 4.5 V to 5.5 V Range 3 M95640-W 2.5 V to 5.5 V Range 6 Range 3 Range 6 Range 3 M95640-R 1.8 V to 5.5 V Range 6 Range 6 Range 6
Package
SO8 (MN) TSSOP (DW) MLP 2 x 3 mm (MB)
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M95320, M95640, M95320-x, M95640-x
Revision history
12
Revision history
Table 28.
Date 13-Jul-2000
Document revision history
Revision 1.2 Changes Human Body Model meets JEDEC std (Table 2). Minor adjustments on pp 1,11,15. New clause on p7. Addition of TSSOP8 package on pp 1, 2, Ordering Info, Mechanical Data Test condition added ILI and ILO, and specification of tDLDH and tDHDL removed. tCLCH, tCHCL, tDLDH and tDHDL changed to 50ns for the -V range. "-V" Voltage range changed to "2.7V to 3.6V" throughout. Maximum lead soldering time and temperature conditions updated. Instruction sequence illustrations updated. "Bus Master and Memory Devices on the SPI bus" illustration updated. Package Mechanical data updated M95160 and M95080 devices removed to their own data sheet Endurance increased to 1M write/erase cycles Instruction sequence illustrations updated Document reformatted using the new template. No parameters changed. Announcement made of planned upgrade to 10MHz clock for the 5V, -40 to 85C, range. Endurance set to 100K write/erase cycles 10MHz, 5MHz, 2MHz clock; 5ms, 10ms Write Time; 100K, 1M erase/write cycles distinguished on front page, and in the DC and AC Characteristics tables Process identification letter corrected in footnote to AC Characteristics table for temp. range 3 -S voltage range upgraded by removing it and inserting -R voltage range in its place Table of contents, and Pb-free options added. VIL(min) improved to -0.45V VI(min) and VO(min) corrected (improved) to -0.45V TSSOP8 connections added to DIP and SO connections M95320-S and M95640-S root part numbers (1.65 to 5.5V Supply) and related characteristics added. 20MHz Clock rate added.TSSOP14 package removed and MLP8 package added. Description of Power On Reset: VCC Lock-Out Write Protect updated. Product List summary table added. Absolute Maximum Ratings for VIO(min) and VCC(min) improved. Soldering temperature information clarified for RoHS compliant devices. Device Grade 3 clarified, with reference to HRCF and automotive environments. AEC-Q100-002 compliance. tCHHL(min) and tCHHH(min) is tCH for products under "S" process. tHHQX corrected to tHHQV. Figure 16: Hold timing updated.
16-Mar-2001
1.3
19-Jul-2001 06-Dec-2001 18-Dec-2001 08-Feb-2002
1.4 1.5 2.0 2.1
18-Dec-2002
2.2
26-Mar-2003 26-Jun-2003 15-Oct-2003 21-Nov-2003 28-Jan-2004
2.3 2.4 3.0 3.1 4.0
24-May-2005
5.0
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Revision history Table 28.
Date
M95320, M95640, M95320-x, M95640-x Document revision history (continued)
Revision Changes Document converted to new ST template. Packages are ECOPACK(R) compliant. PDIP package removed. SO8N package specifications updated (see Table 22 and Figure 18). M95640-S and M95320-S part numbers removed (DC and AC parameters updated accordingly). How to identify previous, current and new products by the Process identification letter Table removed. Figure 4: SPI modes supported updated and Note 2 added. First three paragraphs of Section 4: Operating features replaced by Section 4.1: Supply voltage (VCC). TA added to Table 7: Absolute maximum ratings. ICC and ICC1 updated in Table 13, Table 13, Table 14 and Table 16. VOL and VOH updated in Table 14. ICC updated in Table 15. Data in Table 16 is no longer preliminary. tCH updated in Table 18. Table 21: AC characteristics (M95640-R) added. Timing line of tSHQZ modified in Figure 17: Serial output timing. Process letter added to Table 25: Ordering information scheme, Note 2 removed. Note 2 removed from Figure 2. JEDEC standard revision updated to D in Note 1 below Table 7: Absolute maximum ratings. Note 2 removed below Figure 3 and explanatory paragraph added. Section 4.1: Supply voltage (VCC) updated. Table 6: Address range bits corrected. Products operating at VCC = 4.5 V to 5.5 V are no longer available in the device grade 6 TA temperature range. ICC and ICC1 parameters modified in Table 14: DC characteristics (M95320-W and M95640-W, device grade 6). Maximum frequency for M95640-W and M95320-W upgraded from 5 MHz to 10 MHz in the device grade 6 TA temperature range (Table 18: AC characteristics (M95320-W and M95640-W, device grade 6) modified accordingly). Table 27: Available M95640x products (package, voltage range, temperature grade): /PB process letter added, /P process letter removed. Blank option removed below Plating technology in Table 25: Ordering information scheme. Table 26 and Table 27 added. Small text changes. Table 24: UFDFPN8 (MLP8) - 8-lead ultra thin fine pitch dual flat no lead, package mechanical data updated. Package mechanical inch values calculated from mm and rounded to 4 decimal digits in Section 10: Package mechanical data. Section 2.7: VSS ground added. Device behavior when VCC passes over the POR threshold updated (see Section 4.1.2: Device reset and Section 4.1.4: Power-down). VIL and VIH modified in Table 16: DC characteristics (M95320-R and M95640-R). tW, write time, modified in Table 20: AC characteristics (M95320-R) and Table 21: AC characteristics (M95640-R). Small text changes.
07-Jul-2006
6
09-Oct-2007
7
17-Dec-2007
8
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M95320, M95640, M95320-x, M95640-x Table 28.
Date
Revision history
Document revision history (continued)
Revision Changes Section 4.1: Supply voltage (VCC) updated. 10 MHz frequencies added to Table 17: AC characteristics (M95320 and M95640, device grade 3) and Table 19: AC characteristics (M95320-W and M95640-W, device grade 3). Small text changes. Section 4.1: Supply voltage (VCC) updated. Table 16: DC characteristics (M95320-R and M95640-R) modified. Figure 15: Serial Input timing, Figure 16: Hold timing and Figure 17: Serial output timing modified.
20-Mar-2008
9
23-Jun-2008
10
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M95320, M95640, M95320-x, M95640-x
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