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BU21010MUV 数据表(PDF) 5 Page - Rohm |
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BU21010MUV 数据表(HTML) 5 Page - Rohm |
5 / 15 page BU21010MUV Technical Note 5/14 www.rohm.com 2009.04 - Rev.B © 2009 ROHM Co., Ltd. All rights reserved. START SDA SCL STOP Address Read ACK ACK ACK Data Data ● HOST I/F ・ 2 wire serial, BUS Slave mode only Slave Address = 5Eh Normal (Normal mode. 100kHz Transfer rate) Fs mode (Fast mode. 400kHz Transfer rate) also. Not adapting sequential read / write. 【 Data format】 Parameter Standard mode High Speed mode Unit MIN MAX MIN MAX fSCL : SCL Clock Freq 0 100 0 400 kHz tHD;STA : START condition hold time 4.0 - 0.6 - μsec tLOW : SCL “L” 4.7 - 1.3 - μsec tHIGH : SCL “H” 4.0 - 0.6 - μsec tHD;DAT : Data hold time 0.1 3.45 0.1 0.9 μsec tSU;DAT : Data setup time 0.25 - 0.1 - μsec tSU;STO : START condition hold time 4.0 - 0.6 - μsec tBUF : Free time of bus between STOP condition and START condition 4.7 - 1.3 - μsec 【 PROTOCOL】 ・ Write Protocol S SLAVE ADDRESS W A REGISTER ADDRESS A WRITE DATA AP 7bit = 5Eh 8bit 8bit ・ Read Protocol S SLAVE ADDRESS W A REGISTER ADDRESS A S SLAVE ADDRESS R A READ DATA N P 7bit = 5Eh 8bit 7bit = 5Eh 8bit from Master to Slave S = START condition from Slave to Master P = STOP condition R = data direction READ (SDA HIGH) W = data direction WRITE (SDA LOW) A = acknowledge (SDA LOW) N = not acknowledge (SDA HIGH) tHD;STA tSU;STO tSU;DAT tHD;DAT |
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