25AA640A(2008) 查看數據表（PDF） - Microchip Technology

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产品描述 (功能)

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25AA640A
(Rev.:2008)

64K SPI Bus Serial EEPROM

Microchip Technology 

25AA640A/25LC640A

FIGURE 2-2: BYTE WRITE SEQUENCE

CS

SCK

SI

SO

0 1 2 3 4 5 6 7 8 9 10 11

Twc

21 22 23 24 25 26 27 28 29 30 31

Instruction

16-bit Address

Data Byte

0 0 0 0 0 0 1 0 15 14 13 12

2 1 07 6 5 4 3 2 1 0

High-Impedance

FIGURE 2-3: PAGE WRITE SEQUENCE

CS

SCK

SI

0 1 2 3 4 5 6 7 8 9 10 11

21 22 23 24 25 26 27 28 29 30 31

Instruction

16-bit Address

Data Byte 1

0 0 0 0 0 0 1 0 15 14 13 12

210765 432 10

CS

SCK

SI

32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

Data Byte 2

Data Byte 3

7654321076543210

Data Byte n (32 max.)

76543210

DS21830D-page 8

© 2008 Microchip Technology Inc.

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