23A640-E/P MICROCHIP [Microchip Technology], 23A640-E/P Datasheet - Page 7

• Manufacturer Part Number: 23A640-E/P
• Description: 64K SPI Bus Low-Power Serial SRAM
• Manufacturer: MICROCHIP [Microchip Technology]

TABLE 2-1:
FIGURE 2-1:
FIGURE 2-2:
© 2009 Microchip Technology Inc.
SCK
Instruction Name
CS
SO
SI
SCK
CS
SO
SI
WRITE
READ
RDSR
WRSR
0
0
0
0
0
1
1
0
Instruction
0
INSTRUCTION SET
BYTE READ SEQUENCE
BYTE WRITE SEQUENCE
2
0
2
0
Instruction
3
3
0
0
Instruction Format
4
0000 0011
0000 0010
0000 0101
0000 0001
0
4
0
5
High-Impedance
5
0
1
6
High-Impedance
0
6
1
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
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
23A640/23K640
Description
6
7
5
Data Byte
6
4
5
3
Data Out
4
2
3
1
DS22126C-page 7
2
0
1
0