FM25V20 Ver la hoja de datos (PDF) - Cypress Semiconductor

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FM25V20

2Mb Serial 3V F-RAM Memory

Cypress Semiconductor 

FM25V20 – 2Mb SPI F-RAM

S

0123456701234567

456701234567

C

op-code

18-bit Address

Data

D

0 0 0 0 0 0 1 0 0 0 0 0 0 0 A17 A16

A3 A2 A1 A0 7 6 5 4 3 2 1 0

MSB

LSB MSB

LSB

Q

Figure 9. Memory Write with 3-Byte Address

S

0123456701234567

456701234567

C

op-code

18-bit Address

D

0 0 0 0 0 0 1 1 0 0 0 0 0 0 A17 A16

A3 A2 A1 A0

MSB

LSB

MSB

Data

LSB

Q

76543210

Figure 10. Memory Read with 3-Byte Address

S

012345670123

567

456701234567

C

op-code

18-bit Address

Dummy byte

D

00001011 0000

A2 A1 A0

XXXX

MSB

LSB

MSB

Data

LSB

Q

76543210

Figure 11. Fast Read with 3-Byte Address and Dummy Byte

Rev. 3.0

August 2012

Page 8 of 17

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