Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1173 of 1823
Jul 31, 2019
RX23W Group 35. I
2
C-bus Interface (RIICa)
Figure 35.32 Automatic Low-Hold Operation in Receive Mode (Using RDRFS and WAIT Bits)
RDRF
Read ICDRR register
RDRF
Data
Automatic low-hold (WAIT)
Automatic low-hold (WAIT)
ACK
Data Data
[RDRFS = 0, WAIT = 0]
Read ICDRR register
Read ICDRR register Read ICDRR register
[RDRFS = 0, WAIT = 1]
Automatic low-
hold (WAIT)
Data Data
ACK Data
Read ICDRR resgisterRead ICDRR register
Automatic low-hold
(to prevent failure to
receive data)
Automatic low-
hold (RDRFS)
Automatic low-hold (RDRFS)
[RDRFS = 1, WAIT = 0]
[RDRFS = 1, WAIT = 1]
Write 0 to ACKBT bit
Read ICDRR register
Read ICDRR register Write 0 to ACKBT bit
ACK
Data ACK Data
ACK
Automatic low-hold
(RDRFS)
Automatic low-hold (WAIT)
Automatic low-hold
(RDRFS)
Write 0 to ACKBT bit Read ICDRR register Read ICDRR register Write 0 to ACKBT bit
234567 81 234234567 8199 91
234567 81234567 8199 91
234567 8 91234567 819
234567 8 919 234567 81
Automatic low-hold
(to prevent failure to receive data)
ACK
ACK ACK ACK
RDRF
ACKBT
RDRF
ACKBT
Data
ACK
SCL0
SDA0
SCL0
SDA0
SCL0
SDA0
SCL0
SDA0

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English