M95040 datasheet(10/42 Pages) STMICROELECTRONICS

Part #	M95040

Description	4 Kbit, 2 Kbit and 1 Kbit serial SPI bus EEPROM with high-speed clock

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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10 / 42 page

Signal description

M95040, M95020, M95010

10/42

Once VCC has passed over the POR threshold, the device is reset and in the following state:

●

Standby Power mode

●

deselected (at next power-up, a falling edge is required on Chip Select (S) before any

instructions can be started)

●

not in the Hold condition

●

Status Register:

–

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 non-volatile bits and therefore remain unchanged)

Note:

Once VCC has passed the power on reset threshold voltage, until VCC reaches the minimum

VCC operating voltage, the memory must not be selected/accessed.

2.8.4

Power-down

At power-down (continuous decrease in VCC below the minimum VCC operating voltage),

the device must be:

●

deselected (Chip Select S should be allowed to follow the voltage applied on VCC)

●

in Standby Power mode (that should not be any internal write cycle in progress)

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