BR35H160-WC ROHM Co. Ltd., BR35H160-WC Datasheet - Page 7

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

© 2011 ROHM Co., Ltd. All rights reserved.
BR35H□□□-WC Series
www.rohm.com
○This IC has a write enable status and a write disable status. Write enable status is achieved by the write enable
2. Read command (READ)
3. Write command (WRITE)
CSB
SCK
SO
SI
command and write disable status is achieved by the write disable command. As for these commands, set CSB to LOW
and then input the respective ope codes. The respective commands are accepted at the 7-th clock rise. The command is
also valid with Inputs over 7 clocks.
In order to perform a write command it is necessary to use the write enable command to set the IC to the write enable
status. If a write command is input during write disable status the command will be cancelled. After a write command is
input during write enable status the IC will return to the write disable status. When turning on the power the IC will be in
write disable status.
By use of the read command, the data of the EEPROM can be read. As for this command, set CSB to LOW, then input
the address after the read ope code. EEPROM starts data output of the designated address. Data output is started from
the SCK fall of 23 clock and from D7 to D0 sequentially. The IC features an increment read function. After the output of 1
byte (8bits) of data, by continuing input of SCK the next data addresses can be read. Increment read can read all
addresses of the EEPROM. After reading the data of the most the significant address, by continuing with the increment
read the data of the most insignificant address is read.
CSB
SCK
CSB
SCK
SO
CSB
SCK
SO
SI
SO
SI
SI
High-Z
High-Z
High-Z
High-Z
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
0
0
Fig.33 Read command (BR35H160/320/640/128-WC)
2
2
2
0
Fig.36 N Byte page write command (BR35H128-WC)
Fig.35 N Byte page write command (BR35H160/320/640-WC)
0
2
0
0
3
3
3
0
0
0
3
0
Fig.34 Write command (BR35H160/320/640/128-WC)
4
4
4
0
0
0
4
5
5
0
5
0
1
1
6
6
5
1
0
0
6
7
1
7
6
*
1
*
0
7
8
8
7
*
8
*
～ ～
～ ～
～ ～
～ ～
～ ～
8
～ ～
～ ～
～ ～
*
9
*
9
12
12
A13 A12
A13
10
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
10
A12
A1
11
A1
11
～ ～
A0
～ ～
～ ～
～ ～
～ ～
A0
～ ～
23
～ ～
～ ～
～ ～
～ ～
～ ～
23
D7
D7
A1
24
A1
24
D6
D6
25
A0
25
A0
23
23
7/16
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
～ ～
D7
D7
24
D1
24
D1
30
30
D6
D6
D0
D0
31
31
～ ～
～ ～
～ ～
～ ～
～ ～
D7
D7
32
32
～ ～
～ ～
～ ～
～ ～
～ ～
D6
D6
D2
D2
33
33
～ ～
～ ～
D1
D1
～ ～
～ ～
30
30
64n-8
32n-8
D7
＊=Don't Care
D7
CSB valid timing
CSB valid timing
D0
D0
31
64n-7
D6
32n-7
D6
～ ～
＊=Don't Care
～ ～
64n-2
32n-2
64n-1
D0
32n-1
D0
64n
32n
BR35H160-WC
BR35H320-WC
BR35H640-WC
BR35H128-WC
BR35H160-WC
BR35H320-WC
BR35H640-WC
BR35H128-WC
Product
Product
number
number
Technical Note
2011.03 - Rev.C
Address
Address
A10-A0
A12-A0
A13-A0
A10-A0
A11-A0
A12-A0
A13-A0
A11-A0
Length
Length