S-25C010A Datasheet, PDF (10/37 Pages) Seiko Instruments Inc – CMOS SPI SERIAL E2PROM

CMOS SPI SERIAL E²PROM
S-25C010A/020A/040A
Rev.1.0_00
„ Instruction Setting
Table 15 and 16 are the lists of instruction for the S-25C010A/020A/040A. The instruction is able to be input by changing
the CS pin “H” to “L”. Input the instruction in the MSB first. Each instruction code is organized with 1-byte as shown
below.
If the S-25C010A/020A/040A receives any invalid instruction code, the device goes in the non-select status.
1. S-25C010A020A
Table 15
Instruction code
Address
Instruction
Operation
SCK input clock SCK input clock
1 to 8
9 to 16
WREN
Write enable
0000 X110
−
WRDI
RDSR
Write disable
Read the status register
0000 X100
0000 X101
−
b7 to b0 output ^*1
WRSR
READ
WRITE
Write in the status register
Read memory data
Write memory data
0000 X001
0000 X011
0000 X010
b7 to b0 input
A7^*2 to A0
A7^*2 to A0
*1. Sequential data reading is possible.
*2. In the S-25C010A, A7 = Don’t care because the address range is A6 to A0.
*3. After outputting data in the specified address, data in the following address is output.
Data
SCK input clock
17 to 24
−
−
−
−
D7 to D0 output ^*3
D7 to D0 input
Remark X = Don’t care.
2. S-25C040A
Table 16
Instruction
Operation
Instruction code
SCK input clock
1 to 8
Address
SCK input clock
9 to 16
WREN
Write enable
0000 X110
−
WRDI
RDSR
Write disable
Read the status register
0000 X100
0000 X101
−
b7 to b0 output ^*1
WRSR
READ
WRITE
Write in the status register
Read memory data
Write memory data
0000 X001
0000 [A8^*2] 011
0000 [A8^*2] 010
b7 to b0 input
A7 to A0
A7 to A0
*1. Sequential data reading is possible.
*2. In the S-25C040A, assign bit A8 in the address into the fifth bit in an instruction code.
*3. After outputting data in the specified address, data in the following address is output.
Data
SCK input clock
17 to 24
−
−
−
−
D7 to D0 output ^*3
D7 to D0 input
Remark X = Don’t care.
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Seiko Instruments Inc.