R01UH0822EJ0100 Rev.1.00
Page 769 of 1041
Jul 31, 2019
RX13T Group
24. I
2
C-bus Interface (RIICa)
Figure 24.16
Slave Transmit Operation Timing (1) (7-Bit Address Format)
Figure 24.17
Slave Transmit Operation Timing (2)
Automatic low hold (to prevent wrong transmission)
0 (ACK)
Write data to
ICDRT register
(DATA 1)
TDRE
MST
TRS
BBSY
TEND
S
9
NACKF
START
ICDRT
ICDRS
DATA 2
DATA 3
DATA 2
7-bit slave address
R
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]
[3]
1
b7
9
8
b0
DATA 1
DATA 1
[3]
1
b7
Slave receive mode
Slave transmit mode
AASy
XXXX (Initial value/last data for transmission)
7-bit a R
XXXX (Initial value/last data for reception)
0 (ACK)
X (ACK/NACK)
0 (ACK)
Write data to
ICDRT register
(DATA 2)
Write data to
ICDRT register
(DATA 3)
ACK
ACK
Transmit data (DATA 2)
Transmit data (DATA 1)
SCL0
SDA0
ACK
TDRE
MST
TRS
BBSY
TEND
STOP
ICDRT
ICDRS
DATA n
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-1
DATA n
DATA n-2
RDRF
ICDRR
9
9
ACKBT
ACKBR
[5]
[4]
NACKF
9
P
[7]
AASy
DATA n-2
DATA n-1
0 (ACK)
1 (NACK)
ACK
NACK
Transmit data (DATA n-1)
Transmit data (DATA n)
XXXX (Initial value/last data for reception)
Write data to ICDRT register
(last data for transmission
[DATA n])
Clear
STOP
flag
Clear
NACKF flag
0 (ACK)
0 (ACK)
SCL0
SDA0
Dummy read
ICDRR register
(SCL0 line is released)