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BR35H128FJ-WCE2 Datasheet(PDF) 9 Page - Rohm |
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BR35H128FJ-WCE2 Datasheet(HTML) 9 Page - Rohm |
9 / 17 page Technical Note 9/16 BR35H□□□-WC Series www.rohm.com 2011.03 - Rev.C © 2011 ROHM Co., Ltd. All rights reserved. 4.Status register read command 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. ● At standby ○ Current at standby Set CSB “H”, and be sure to set SCK, SI input “L” or “H”. Do not input intermediate electric potantial. ○ Timing 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 High-Z bit7 bit6 bit5 bit4 0 0 0 bit3 bit2 bit1 bit0 13 CSB SCK SI 1 1 10 6 0 SO 14 1 2 WEN R/B 11 15 3 7 9 0 5 12 0 0 0 0 0 4 8 0 0 0 Fig.38 Status register read command (BR35H160/320/640/128-WC) 0 1 2 Command start here. SI is read. Even if CSB is fallen at SCK=SI=”H”, SI status is not read at that edge. CSB SCK SI Fig.39 Operating timing |
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