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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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NUC505-YO2T Datenblatt(PDF) 118 Page - Nuvoton Technology Corporation |
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NUC505-YO2T Datenblatt(HTML) 118 Page - Nuvoton Technology Corporation |
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118 / 130 page  NUC505 July. 26, 2018 Page 118 of 130 Rev.1.08 7.4.7 I 2C Dynamic Characteristics Symbol Parameter Standard Mode[1][2] Fast Mode[1][2] Unit Min. Max. Min. Max. tLOW SCL low period 4.7 - 1.2 - uS tHIGH SCL high period 4 - 0.6 - uS tSU; STA Repeated START condition setup time 4.7 - 1.2 - uS tHD; STA START condition hold time 4 - 0.6 - uS tSU; STO STOP condition setup time 4 - 0.6 - uS tBUF Bus free time 4.7[3] - 1.2[3] - uS tSU;DAT Data setup time 250 - 100 - nS tHD;DAT Data hold time 0[4] 3.45[5] 0[4] 0.8[5] uS tr SCL/SDA rise time - 1000 20+0.1Cb 300 nS tf SCL/SDA fall time - 300 - 300 nS Cb Capacitive load for each bus line - 400 - 400 pF Notes: 1. Guaranteed by design, not tested in production. 2. HCLK must be higher than 2 MHz to achieve the maximum standard mode I 2C frequency. It must be higher than 8 MHz to achieve the maximum fast mode I 2C frequency. 3. I 2C controller must be retriggered immediately at slave mode after receiving STOP condition. 4. The device must internally provide a hold time of at least 300 ns for the SDA signal in order to bridge the undefined region of the falling edge of SCL. 5. The maximum hold time of the Start condition has only to be met if the interface does not stretch the low period of SCL signal. tBUF STOP SDA SCL START tHD;STA tLOW tHD;DAT tHIGH tf tSU;DAT Repeated START tSU;STA tSU;STO STOP tr Figure 7.4-2 I 2C Timing Diagram |
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