S-25C010A-H Datasheet, PDF (13/33 Pages) Seiko Instruments Inc – OPERATION SPI SERIAL E2PROM FOR AUTOMOTIVE

Rev.2.3_01_C
105°C OPERATION SPI SERIAL E²PROM FOR AUTOMOTIVE
S-25C010A/020A/040A H Series
2. Write enable (WREN)
Before writing data (WRITE and WRSR), be sure to set bit Write Enable Latch (WEL). This instruction is to set bit
WEL. Its operation is below.
After selecting the device by the chip select ( CS ), input the instruction code from serial data input (SI). To set bit WEL,
set the device in the non-select status by CS at the 8th clock of the serial clock (SCK). To cancel the WREN
instruction, input the clock different from a specified value (n = 8 clock) while CS is in “L”.
CS
WP
High
SCK
SI
1
2
3
4
5
6
7
8
Instruction
X
SO
Remark X = Don’t care.
High-Z
Figure 11 WREN Operation
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