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BU21023MUV-E2 Arkusz danych(PDF) 8 Page - Rohm |
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BU21023MUV-E2 Arkusz danych(HTML) 8 Page - Rohm |
8 / 21 page BU21023GUL BU21023MUV BU21024FV-M 8/17 TSZ02201-0L5L0F300840-1-2 © 2013 ROHM Co., Ltd. All rights reserved. 7.June.2016 Rev.004 www.rohm.com TSZ22111・15・001 HOST-I/F mode (2-wire serial) (SCL=SCL_SCK, SDA=SDA_SI) The 2-wire serial mode presents an I 2C interface for all practical purposes, but it is not a complete implementation conforming to the I 2C specification. BU21023MUV/BU21023GUL devices can co-exist with other I2C devices on the same bus. The slave address for 2-wire serial communication is 5Ch or 5Dh. This is determined by the SEL_CSB pin. SEL_CSB = “L” : Slave address = 5Ch SEL_CSB = “H” : Slave address = 5Dh Condition : VDD = 3.0V Ta=25°C Parameter Symbol Limit Unit Conditions Min Typ Max SCL Clock Frequency fSCL 0 - 400 kHz START Condition Hold Time tHD:STA 0.6 - - µs SCL “L” tLOW 1.3 - - µs SCL “H” tHIGH 0.6 - - µs Data Hold Time tHD:DAT 0.1 - - µs Data Setup Time tSU:DAT 0.1 - - µs STOP Condition Setup Time tSU:STO 0.6 - - µs S SLAVE ADDRESS W A REGISTER ADDRESS A A P 7bit = 5Ch or 5Dh 8bit S SLAVE ADDRESS W A REGISTER ADDRESS A S R A READ DATA N P 7bit = 5Ch or 5Dh 8bit 8bit S P R W A N = acknowledge (SDA LOW) = not acknowledge (SDA HIGH) from Slave to Master = STOP condition = data direction READ (SDA HIGH) = data direction WRITE (SDA LOW) SLAVE ADDRESS 7bit = 5Ch or 5Dh from Master to Slave = START condition ・ Write protocol WRITE DATA ・ Read protocol S T A R T SDA SCL S T O P Address R e a d / W r i t e ACK ACK ACK Data Data tHD;STA tSU;STO tSU;DAT tHD;DAT SDA SCL |
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