S-25C010A Datasheet, PDF (12/37 Pages) Seiko Instruments Inc – CMOS SPI SERIAL E2PROM

CMOS SPI SERIAL E²PROM
S-25C010A/020A/040A
Rev.1.0_00
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 / Low
SCK
SI
SO
Remark X = Don’t care.
1
2
3
4
5
6
7
8
Instruction
X
High-Z
Figure 11 WREN operation
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Seiko Instruments Inc.