M95256-RDW6TP STMicroelectronics, M95256-RDW6TP Datasheet - Page 15

• Manufacturer Part Number: M95256-RDW6TP
• Description: IC EEPROM 256KBIT 2MHZ 8TSSOP
• Manufacturer: STMicroelectronics

Specifications of M95256-RDW6TP

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 256K (32K x 8)
• Speed: 2MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6352-2

M95256-DR, M95256, M95256-W, M95256-R
5.1
5.2
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
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 6.
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
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:
●
●
●
●
Figure 7.
Power-up
WRDI instruction execution
WRSR instruction completion
WRITE instruction completion
Figure
Write Enable (WREN) sequence
Figure
Write Disable (WRDI) sequence
S
C
D
Q
6, to send this instruction to the device, Chip Select (S) is driven low,
7, to send this instruction to the device, Chip Select (S) is driven low,
S
C
D
Q
Doc ID 12276 Rev 13
High Impedance
0
High Impedance
0
1
1
2
2
Instruction
Instruction
3
3
4
4
5
5
6
6
7
7
AI02281E
AI03750D
Instructions
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