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PIC17C752-08/CL Datasheet(PDF) 290 Page - Microchip Technology |
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PIC17C752-08/CL Datasheet(HTML) 290 Page - Microchip Technology |
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290 / 328 page  PIC17C7XX DS30289A-page 290 © 1998 Microchip Technology Inc. FIGURE E-12: I2C BUS DATA TIMING SPECIFICATION TABLE E-3: I2C BUS DATA TIMING SPECIFICATION Microchip Parameter No. Sym Characteristic Min Max Units Conditions 100 THIGH Clock high time 100 kHz mode 4.0 — µs 400 kHz mode 0.6 — µs 101 TLOW Clock low time 100 kHz mode 4.7 — µs 400 kHz mode 1.3 — µs 102 TR SDA and SCL rise time 100 kHz mode — 1000 ns 400 kHz mode 20 + 0.1Cb 300 ns Cb is specified to be from 10 to 400 pF 103 TF SDA and SCL fall time 100 kHz mode — 300 ns 400 kHz mode 20 + 0.1Cb 300 ns Cb is specified to be from 10 to 400 pF 90 TSU:STA START condition setup time 100 kHz mode 4.7 — µs Only relevant for repeated START condition 400 kHz mode 0.6 — µs 91 THD:STA START condition hold time 100 kHz mode 4.0 — µs After this period the first clock pulse is generated 400 kHz mode 0.6 — µs 106 THD:DAT Data input hold time 100 kHz mode 0 — ns 400 kHz mode 0 0.9 µs 107 TSU:DAT Data input setup time 100 kHz mode 250 — ns Note 2 400 kHz mode 100 — ns 92 TSU:STO STOP condition setup time 100 kHz mode 4.7 — µs 400 kHz mode 0.6 — µs 109 TAA Output valid from clock 100 kHz mode — 3500 ns Note 1 400 kHz mode — 1000 ns 110 TBUF Bus free time 100 kHz mode 4.7 — µs Time the bus must be free before a new transmission can start 400 kHz mode 1.3 — µs D102 Cb Bus capacitive loading — 400 pF Note 1: As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region (min. 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions. 2: A fast-mode I2C-bus device can be used in a standard-mode I2C-bus system, but the requirement tsu;DAT ≥ 250 ns must then be met. This will automatically be the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line TR max.+tsu;DAT = 1000 + 250 = 1250 ns (according to the standard-mode I2C bus specification) before the SCL line is released. 90 91 92 100 101 103 106 107 109 109 110 102 SCL SDA In SDA Out |
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