R01UH0823EJ0100 Rev.1.00
Page 1160 of 1823
Jul 31, 2019
RX23W Group
35. I
2
C-bus Interface (RIICa)
Figure 35.19
Slave Receive Operation Timing (1) (7-Bit Address Format, when RDRFS bit is 0)
Figure 35.20
Slave Receive Operation Timing (2) (when RDRFS bit is 0)
7-bit a W
Read ICDRR register
(Dummy read
[7-bit a W])
Automatic low hold
(to prevent failure to receive data)
7-bit slave address
X (ACK/NACK)
XXXX (Initial value/last data for reception)
0 (ACK)
9
TDRE
MST
TRS
BBSY
TEND
S
NACKF
START
ICDRT
ICDRS
DATA 2
W
2
b6
3
b5
4
b4
5
b3
6
b2
7
b1
2
b6
4
b4
5
b3
6
b2
7
b1
3
b5
8
b0
1
b7
2
b6
4
b4
3
b5
DATA 1
DATA 2
RDRF
ICDRR
ACKBT
ACKBR
[3]
1
b7
DATA 1
[3][4]
8
b0
9
1
b7
DATA 1
AASy
Receive data (7-bit a W)
Receive data (DATA 1)
XXXX (Initial value/last data for transmission)
7-bit a W
0 (ACK)
0 (ACK)
Read ICDRR
register
(DATA 1)
ACK
ACK
SCL0
SDA0
XXXX (Initial value/last data for transmission)
0 (ACK)
Read ICDRR
register
(DATA n-2)
TDRE
MST
TRS
BBSY
TEND
STOP
ICDRT
ICDRS
DATA n
2
b6
4
b4
5
b3
6
b2
7
b1
3
b5
8
b0
1
b7
2
b6
4
b4
5
b3
6
b2
7
b1
3
b5
8
b0
8
b0
1
b7
7
b1
DATA n-1
DATA n
DATA n-2
RDRF
ICDRR
9
9
ACKBT
ACKBR
[3] [4]
NACKF
AASy
9
P
[3] [4]
[3] [4]
[6]
Receive data (DATA n)
Receive data (DATA n-1)
DATA n-2
DATA n-1
DATA n-1
DATA n-3
DATA n-2
0 (ACK)
0 (ACK)
Read ICDRR
register
(DATA n-1)
Read ICDRR
register
(DATA n)
Clear
STOP flag
Receive data (DATA n-2)
ACK
ACK
ACK
0 (ACK)
DATA n
SCL0
SDA0