23a256 Microchip Technology Inc., 23a256 Datasheet - Page 7

• Manufacturer Part Number: 23a256
• Description: 256k Spi Bus Low-power Serial Sram
• Manufacturer: Microchip Technology Inc.

FIGURE 2-3:
FIGURE 2-4:
© 2009 Microchip Technology Inc.
SCK
SCK
SCK
SCK
CS
CS
CS
CS
SO
SO
SI
SI
SI
SI
0
0
0
0
7
32
1
0
7
0
32
1
PAGE READ SEQUENCE
6
Instruction
0
33
2
Instruction
0
6
33
2
Page X, Word Y+1
Page X, Word Y+1
PAGE WRITE SEQUENCE
5
3
0
5
0
34 35 36 37 38 39
3
34 35 36 37 38 39
4
0
4
0
4
4
3
High Impedance
5
0
3
0
5
1
2
1
6
2
6
0
1
7
1
1
7
15 14 13 12
15 14 13 12
0
8
0
8
9 10 11
9 10 11
7
16-bit Address
Page X, Word Y
Preliminary
Page X, Word Y
16-bit Address
7
6
6
Page X, Word 31
Page X, Word 31
5
5
4
4
21 22 23 24 25 26 27 28 29 30 31
3
2
21 22 23 24 25 26 27 28 29 30 31
2
3
2
1
1
2
1
0
0
1
7
0
23A256/23K256
7
0
6
7
6
7
Page X, Word Y
Page X, Word Y
5
6
5
6
Page X, Word 0
Page X, Word 0
4
5
4
5
3
4
3
4
3
2
2
3
2
1
DS22100C-page 7
1
2
1
0
0
1
0
0