Figure 3-5. data byte with ack and nack -6 – Cirrus Logic CS4953xx User Manual
Page 38
I2C Port
CS4953xx Hardware User’s Manual
DS732UM10
Copyright 2010 Cirrus Logic, Inc
3-6
Figure 3-5. Data Byte with ACK and NACK
After an ACK or NACK from the master or slave, the slave must leave the SCP1_SDA line high so the
master can then generate either another Start condition as shown in
to start a new transfer or a
to abort the transfer.
Figure 3-6. Repeated Start Condition with ACK and NACK
Start
SCP1_CLK
SCP1_SDA
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
R/W
ACK
Data Byte
ACK
M
S
M
S
Write
M
S
S
M
Read
Start
SCP1_CLK
SCP1_SDA
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
R/W
ACK
Data Byte
NACK
M
S
M
S
Write
M
S
S
M
Read
M = Master Drives SDA
S = Slave Drives SDA
S C P 1 _ C L K
S C P 1 _ S D A
D a t a B y te
N A C K
S t a r t
A [ 6 ]
A [ 5 ]
A [ 4 ]
A [3 ]
A [2 ]
A [ 1 ]
A [ 0 ]
R / W
A C K
M
S
M
S
W r ite
S
M
M
S
R e a d
M = M a s te r D r iv e s S D A
S = S la v e D r iv e s S D A
SCP1_CLK
SCP1_SDA
Data Byte
ACK
Start
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
R/W
ACK
M
S
M
S
Write
S
M
M
S
Read