25AA640 MICROCHIP [Microchip Technology], 25AA640 Datasheet - Page 7

• Manufacturer Part Number: 25AA640
• Description: 64K SPI Bus Serial EEPROM
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 3-1:
FIGURE 3-2:
FIGURE 3-3:
1997 Microchip Technology Inc.
CS
SO
SCK
SCK
CS
CS
SI
SCK
SI
SI
CS
SO
SI
0
0
0
0
0
0
7
0
32
1
0
READ SEQUENCE
BYTE WRITE SEQUENCE
PAGE WRITE SEQUENCE
1
instruction
0
instruction
0
6
33
2
0
2
instruction
0
5
0
3
34 35 36 37 38 39
data byte 2
0
3
0
4
0
4
0
4
0
3
0
5
high impedance
0
5
1
2
1
6
high impedance
1
0
6
0
1
7
1
15 14 13 12
15 14 13 12
7
0
8
15 14 13 12
8
7
40
9 10 11
25AA640/25LC640/25C640
6
Preliminary
9 10 11
41 42 43
16 bit address
16 bit address
5
data byte 3
16 bit address
4
3
44 45
2
21 22 23 24 25 26 27 28 29 30 31
2
2
21 22 23 24 25 26 27 28 29 30 31
1
1
2
1
46 47
0
0
1
0
7
7
0
6
6
7
7
5
5
6
6
data byte n (32 max)
data byte
data byte 1
4
4
5
5
data out
3
3
4
4
2
2
3
3
1
1
2
DS21223A-page 7
2
0
0
1
1
Twc
0
0