Figure 3-9. i, Figure 3-9 – Cirrus Logic CS4953xx User Manual
Page 42
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I2C Port
CS4953xx Hardware User’s Manual
DS732UM10
Copyright 2010 Cirrus Logic, Inc
3-10
Figure 3-9. I
2
C Read Flow Diagram
SCP1_IRQ
(LOW)?
BYTES READ = 4?
Y
N
N
Y
SEND I2C STOP: DRIVE
SCP1_SDA HIGH WHILE
SCP1_CLK IS HIGH
SCP1_IRQ LOW?
Y
N
START
SEND I2C START: DRIVE
SCP1_SDA LOW WHILE
SCP1_CLK IS HIGH
WRITE ADDRESS BYTE
0x81
READ DATA BYTE
SEND ACK
SEND NACK
SCP1_SDA ==
ACK?
Y
N
EXIT (ERROR)
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