FM1608B 데이터 시트보기 (PDF) - Cypress Semiconductor

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FM1608B

64-Kbit (8 K × 8) Bytewide F-RAM Memory

Cypress Semiconductor 

FM1608B

Note that if CE is tied to ground, the user must be sure WE is not

LOW at power-up or power-down events. If the chip is enabled

and WE is LOW during power cycles, data will be corrupted.

Figure 4 shows a pull-up resistor on WE, which will keep the pin

HIGH during power cycles, assuming the MCU / MPU pin

tristates during the reset condition. The pull-up resistor value

should be chosen to ensure the WE pin tracks VDD to a high

enough value, so that the current drawn when WE is LOW is not

an issue.

Figure 4. Use of Pull-up Resistor on WE

VDD

FM1608B

CE

MCU / MPU

WE

OE

A 12-0

DQ 7-0

Document Number: 001-86211 Rev. *C

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