S-25A010A Datasheet, PDF (22/35 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

FOR AUTOMOTIVE 125°C OPERATION SPI SERIAL E²PROM
S-25A010A/020A/040A
Rev.5.2_01
CS
WP
SCK
SI
High
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Instruction
X
8-bit Address
Data Byte (n)
Data Byte (n+x)
A7^*1 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D4 D3 D2 D1 D0
High-Z
SO
*1 In the S-25A010A, A7 = Don’t care because the address range is A6 to A0.
Remark X = Don't care.
Figure 20 WRITE Operation (Page) (S-25A010A/020A)
CS
WP
SCK
SI
High
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Instruction
A8^*1
8-bit Address
Data Byte (n)
Data Byte (n + x)
A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D4 D3 D2 D1 D0
High-Z
SO
*1 In the S-25A040A, assign bit A8 in the address into the fifth bit in an instruction code.
Figure 21 WRITE Operation (Page) (S-25A040A)
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