BR35H160-WC ROHM Co. Ltd., BR35H160-WC Datasheet - Page 6

• Manufacturer Part Number: BR35H160-WC
• Description: Automotive Serial Eeproms
• Manufacturer: ROHM Co. Ltd.

●Features
●Status registers
●Command mode
●Timing chart
© 2011 ROHM Co., Ltd. All rights reserved.
BR35H□□□-WC Series
www.rohm.com
○Status registers
1. Write enable (WREN) / disable (WRDI) cycle
BR35H160-WC
BR35H320-WC
BR35H640-WC
BR35H128-WC
WRITE
This IC has status registers. The status register has 8 bits and expresses the following parameters.
WEN is set by the write enable command and write disable command. WEN goes into the write disable status when the
power source is turned off. The R/B bit is for write confirmation and therefore cannot be set externally.
The status register value can be read by use of the read status command.
WREN
READ
RDSR
WRDI
WEN
Product Number
R/B
bit
Command
Write enable
Write disable
Read
Write
Read status register Status register read command
Register
Register
Memory
location
CSB
SCK
SO
SI
CSB
SCK
SO
SI
High-Z
bit 7
WREN (WRITE ENABLE): Write enable
WRDI (WRITE DISABLE): Write disable
High-Z
0
Write and write status register write enable / disable status confirmation bit
0
0
0
0
Write cycle status (READY / BUSY) status confirmation bit
Write enable command
Write disable command
Read command
Write command
0
bit 6
0
1
0
1
Fig.31
0
0
2
2
Fig.32
bit 5
0
0
0
3
3
Contents
Write enable command
0
0
4
4
Write disable
WEN=0=prohibited
WEN=1=permitted
bit 4
1
R/B=0=READY
1
0
R/B=1=BUSY
5
5
Function
6/16
1
0
6
6
bit 3
0
0
0
7
7
bit 2
0
0000
0000
0000
0000
0000
BR35H160-WC
BR35H320-WC
BR35H640-WC
BR35H128-WC
Ope code
WEN
bit 1
0100
0010
0101
0110
0011
R/B
bit 0
Technical Note
2011.03 - Rev.C