23a256 Microchip Technology Inc., 23a256 Datasheet - Page 6

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

23A256/23K256
TABLE 2-1:
FIGURE 2-1:
FIGURE 2-2:
DS22100C-page 6
SCK
Instruction Name
CS
SO
SI
SCK
CS
SO
SI
WRITE
READ
RDSR
WRSR
0
0
0
0
0
1
1
0
0
INSTRUCTION SET
BYTE READ SEQUENCE
BYTE WRITE SEQUENCE
Instruction
2
0
2
Instruction
0
3
3
0
0
4
Instruction Format
0
0000 0011
0000 0010
0000 0101
0000 0001
4
0
5
High-Impedance
5
0
1
6
High-Impedance
6
1
0
7
15 14 13 12
1
7
8
15 14 13 12
8
9 10 11
9 10 11
16-bit Address
Read data from memory array beginning at selected address
Write data to memory array beginning at selected address
Read STATUS register
Write STATUS register
Preliminary
16-bit Address
21 22 23 24 25 26 27 28 29 30 31
2
1
2
21 22 23 24 25 26 27 28 29 30 31
0 7
1
0
Description
6
7
5
Data Byte
6
© 2009 Microchip Technology Inc.
4
5
3
Data Out
4
2
3
1
2
0
1
0