24AA040 データシートの表示（PDF） - Microchip Technology

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24AA040

4K SPI™ Bus Serial EEPROM

Microchip Technology 

25AA040/25LC040/25C040

FIGURE 3-1:

READ SEQUENCE

CS

SCK

SI

SO

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Instruction

Lower Address Byte

0 0 0 0 A8 0 1 1 A7 6 5 4 3 2 1 A0

Don’t Care

High-impedance

Data Out

76543210

FIGURE 3-2:

BYTE WRITE SEQUENCE

CS

SCK

SI

SO

TWC

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Instruction

Lower Address Byte

Data Byte

0 0 0 0 A8 0 1 0 A7 6 5 4 3 2 1 A0 7 6 5 4 3 2 1 0

High-impedance

FIGURE 3-3:

PAGE WRITE SEQUENCE

CS

SCK

SI

0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 17 18 19 20 21 22 23 24

Instruction

Lower Address Byte

Data Byte 1

0 0 0 0 A8 0 1 0 A7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

CS

SCK

SI

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Data Byte 2

Data Byte 3

7654321076543210

Data Byte n (16 max)

76543210

DS21204E-page 8

© 2006 Microchip Technology Inc.

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