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CS4923 Datenblatt(PDF) 40 Page - Cirrus Logic |
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CS4923 Datenblatt(HTML) 40 Page - Cirrus Logic |
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40 / 56 page ![]() AD6 AD4 AD5 AD3 AD2 AD1 AD0 R/W D7 D6 D5 D4 D3 D2 D1 ACK D0 ACK D7 D6 D5 D4 D3 D2 D1 ACK D0 D7 D6 D5 D4 D3 D2 D1 ACK D0 I2C Start I2C Stop SCCLK SCDIO AD6 AD4 AD5 AD3 AD2 AD1 AD0 R/W D7 D6 D5 D4 D3 D2 D1 ACK D0 ACK D7 D6 D5 D4 D3 D2 D1 ACK D0 D7 D6 D5 D4 D3 D2 D1 NACK D0 I2C Start I2C Stop SCCLK SCDIO INTREQ Note 1 Note 2 Note 3 I2C Write Functional Timing Note 4 Note 5 I2C Read Functional Timing Figure 20. I 2C Timing Notes: 1. The ACK for the address byte is driven by the CS4923/4/5/6/7/8/9. 2. The ACKs for the data bytes being read from the CS4923/4/5/6/7/8/9 should be driven by the host. 3. INTREQ is guaranteed to stay low until the rising edge of SCCLK for last bit of the last byte to be transferred out of the CS4923/4/5/6/7/8/9 4. A NOACK should be sent by the host after the last byte read to indicate the end of the read cycle. 5. INTREQ is guaranteed to stay high until the next rising edge of SCCLK (for the ACK/NACK bit) at which point it may go low again if there is new data to be read. The condition of INTREQ going low at this point should be treated as a new read condition and a new start condition followed by an address byte should be sent. |
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