BR35H160-WC ROHM Co. Ltd., BR35H160-WC Datasheet - Page 9

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

●At standby
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BR35H□□□-WC Series
www.rohm.com
4.Status register read command
○Current at standby
○Timing
The EEPROM status can be read by use of the status register read command. For this command set CSB to Low then
input the ope code of the status register read command followed by the clock input as shown above. The data of status
register will then be read out. This command features increment functionality. When clock input is continued during
CSB=Low, 8 bytes of status register data will be continuously read out. When this command is executed from the start of
write programming to the end of write programming, the end of write programming can be confirmed by checking the
following changes: WEN=Low followed by R/B=Low. After confirming the end of write programming, before inputting the
next command CSB first needs to be High and then put back to Low.
Set CSB “H”, and be sure to set SCK, SI input “L” or “H”. Do not input intermediate electric potantial.
As shown in Fig.39, at standby, when SCK is “H”, even if CSB falls, SI status is not read at fall edge. SI status is read at
SCK rise edge after fall of CSB. At standby and at power ON/OFF, set CSB “H” status
CSB
SCK
SO
SI
High-Z
0
Fig.38
0
0
1
0
Status register read command (BR35H160/320/640/128-WC)
CSB
SCK
2
SI
0
3
Fig.39
0
4
Even if CSB is fallen at SCK=SI=”H”,
SI status is not read at that edge.
1
5
0
Operating timing
Command start here. SI is read.
0
6
1
1
7
9/16
bit7
0
8
bit6
2
0
9
bit5
0
10
bit4
0
11
bit3
0
12
bit2
0
13
WEN
bit1
14
R/B
bit0
15
Technical Note
2011.03 - Rev.C