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PCM1795DB 数据表(PDF) 9 Page - Texas Instruments |
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PCM1795DB 数据表(HTML) 9 Page - Texas Instruments |
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9 / 58 page ![]() TIMING CHARACTERISTICS SDA SCL t (BUF) t (D-SU) t (D-HD) Start t (LOW) t (S-HD) t (SCL-F) t (SCL-R) t (HI) RepeatedStart t (RS-SU) t (RS-HD) t (SDA-F) t (SDA-R) t (P-SU) Stop t (SP) TIMING REQUIREMENTS PCM1795 www.ti.com ........................................................................................................................................................................................................ SLES248 – MAY 2009 Figure 1. Timing Definition on the I2C Bus PARAMETER CONDITIONS MIN MAX UNIT Standard 100 kHz f(SCL) SCL clock frequency Fast 400 kHz Standard 4.7 µs t(BUF) Bus free time between stop and start conditions Fast 1.3 µs Standard 4.7 µs t(LOW) Low period of the SCL clock Fast 1.3 µs Standard 4 µs t(HI) High period of the SCL clock Fast 600 ns Standard 4.7 µs t(RS-SU) Setup time for (repeated) start condition Fast 600 ns t(S-HD) Standard 4 µs Hold time for (repeated) start condition t(RS-HD) Fast 600 ns Standard 250 ns t(D-SU) Data setup time Fast 100 ns Standard 0 900 ns t(D-HD) Data hold time Fast 0 900 ns Standard 20 + 0.1 CB 1000 ns t(SCL-R) Rise time of SCL signal Fast 20 + 0.1 CB 300 ns Standard 20 + 0.1 CB 1000 ns Rise time of SCL signal after a repeated start condition t(SCL-R1) and after an acknowledge bit Fast 20 + 0.1 CB 300 ns Standard 20 + 0.1 CB 1000 ns t(SCL-F) Fall time of SCL signal Fast 20 + 0.1 CB 300 ns Standard 20 + 0.1 CB 1000 ns t(SDA-R) Rise time of SDA signal Fast 20 + 0.1 CB 300 ns Standard 20 + 0.1 CB 1000 ns t(SDA-F) Fall time of SDA signal Fast 20 + 0.1 CB 300 ns Standard 4 µs t(P-SU) Setup time for stop condition Fast 600 ns C(B) Capacitive load for SDA and SCL line 400 pF t(SP) Pulse duration of suppressed spike Fast 50 ns Noise margin at high level for each connected device VNH 0.2 VDD V (including hysteresis) Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): PCM1795 |
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