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BU21023GUL-ME2 Datasheet(PDF) 5 Page - Rohm |
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BU21023GUL-ME2 Datasheet(HTML) 5 Page - Rohm |
5 / 18 page Technical Note 5/17 www.rohm.com 2011.08 - Rev.A © 2011 ROHM Co., Ltd. All rights reserved. BU21023GUL,BU21023MUV,BU21024FV-M ● EEPROM I/F BU21023/BU21024 controllers include an EEPROM interface for firmware download. Device address of EEPROM is set via register 0x51(EEPROM_ADDR). Timing chart Parameter Symbol Limits Unit Condition Min. Typ. Max. SCL clock frequency fSCL 270 310 350 kHz START hold time tHD:STA 0.7 - 0.9 µs SCL ”L” width tLOW 1.4 - 1.8 µs SCL ”H” width tHIGH 1.4 - 1.8 µs Data hold time tHD:DAT 0.7 - 0.9 µs Data setup time tSU:DAT 0.7 - 0.9 µs STOP setup time tSU:STO 0.7 - 0.9 µs Protocol *IC does not support the write command. *IC supports the following read command. SDA SCL Address Read /Write ACK ACK ACK Data Data tHD;STA tSU;STO tSU;DAT tHD;DAT S SLAVE ADDRESS W 1st WORD ADDRESS 2nd WORD ADDRESS DATA(0) DATA(n-3) A A A A A DATA(n-2) A DATA(n-1) A DATA(n) P Start Stop N |
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