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PAS109B Datasheet(PDF) 9 Page - Pixart Imaging Inc. |
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PAS109B Datasheet(HTML) 9 Page - Pixart Imaging Inc. |
9 / 15 page PixArt Imaging Inc. PAS109B CMOS Image Sensor IC All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. 9 PixArt Imaging Inc. E-mail: fae_service@pixart.com.tw V1.1, Mar. 2002 5.3 I 2C Bus Timing Fig 5.4 I 2C Bus Timing 5.4 I 2C Bus Timing Specification STANDARD-MODE PARAMETER SYMBOL MIN. MAX. UNIT SCL clock frequency fscl 10 400 kHz Hold time (repeated) START condition. After this period, the first clock pulse is generated. tHD:STA 4.0 - us Low period of the SCL clock tLOW 4.7 - us HIGH period of the SCL clock tHIGH 0.75 - us Set-up time for a repeated START condition tSU;STA 4.7 - us Data hold time. For I2C-bus device tHD;DAT 0 3.45 us Data set-up time tSU;DAT 250 - ns Rise time of both SDA and SCL signals tr 30 N.D. ns(note1) Fall time of both SDA and SCL signals tf 30 N.D. ns(note1) Set-up time for STOP condition tSU;STO 4.0 - us Bus free time between a STOP and START tBUF 4.7 - us Capacitive load for each bus line Cb 1 15 pF Noise margin at LOW level for each connected device (including hysteresis) VnL 0.1 VDD - V Noise margin at HIGH level for each connected device (including hysteresis) VnH 0.2 VDD - V Note: It depends on the "high" period time of SCL. SDA SDA SDA SDA SCL SCL SCL SCL ttttf ttttHD;STA ttttLOW ttttr ttttHD;DAT ttttHIGH ttttSU;DAT ttttf ttttSU;STA ttttHD;STA ttttSP ttttSU;STO ttttBUF ttttr P P P PS S S S S S S Sr S S S S |
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