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BD37524FS-E2 Datasheet(PDF) 8 Page - Rohm |
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BD37524FS-E2 Datasheet(HTML) 8 Page - Rohm |
8 / 26 page Technical Note 8/25 BD37524FS www.rohm.com 2010.03 - Rev.A © 2010 ROHM Co., Ltd. All rights reserved. ●Timming Chart CONTROL SIGNAL SPECIFICATION (1) Electrical specifications and timing for bus lines and I/O stages Fig.23 Definition of timing on the I2C-bus Table 1 Characteristics of the SDA and SCL bus lines for I 2C-bus devices (Unless specified particularly, Ta=25℃, VCC=8.5V) Parameter Symbol Fast-mode I2C-bus Unit Min. Max. 1 SCL clock frequency fSCL 0 400 kHz 2 Bus free time between a STOP and START condition tBUF 1.3 - μS 3 Hold time (repeated) START condition. After this period, the first clock pulse is generated tHD;STA 0.6 - μS 4 LOW period of the SCL clock tLOW 1.3 - μS 5 HIGH period of the SCL clock tHIGH 0.6 - μS 6 Set-up time for a repeated START condition tSU;STA 0.6 - μS 7 Data hold time: tHD;DAT 0.06* - μS 8 Data set-up time tSU;DAT 120 - ns 9 Set-up time for STOP condition tSU;STO 0.6 - μS All values referred to VIH min. and VIL max. Levels (see Table 2). * A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the VIH min. of the SCL signal) in order to bridge the undefined region of the falling edge of SCL. About 7(tHD;DAT), 8(tSU;DAT), make it the setup which a margin is fully in . SDA S SCL tLOW tR tHD;DAT P tHD;STA tHIGH tBUF tF tSU;DAT tSU;STA tSU;STO tSP tHD;STA Sr P |
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