MB85RS256 Datasheet, PDF (7/19 Pages) Fujitsu Component Limited. – Memory FRAM CMOS 256 K (32 K × 8) Bit SPI

MB85RS256
■ COMMAND
• WREN
The WREN command sets WEL (Write Enable Latch) . WEL has to be set with the WREN command before
writing operation (WRSR command and WRITE command) .
CS
SCK
0
1
2
3
4
5
6
7
SI
Invalid
0
0
0
0
0
1
1
0
High-Z
SO
Invalid
• WRDI
The WRDI command resets WEL (Write Enable Latch) . Writing operation (WRITE command and WRSR
command) are not performed when WEL is reset.
CS
SCK
0
1
2
3
4
5
6
7
SI
Invalid
0
0
0
0
0
1
0
0
High-Z
SO
Invalid
7