R01UH0823EJ0100 Rev.1.00 Page 1127 of 1823
Jul 31, 2019
RX23W Group 35. I
2
C-bus Interface (RIICa)
35.2.6 I
2
C-bus Function Enable Register (ICFER)
TMOE Bit (Timeout Function Enable)
This bit is used to enable or disable the timeout function.
For details on the timeout function, refer to
section 35.11.1, Timeout Function.
MALE Bit (Master Arbitration-Lost Detection Enable)
This bit is used to specify whether to use the arbitration-lost detection function in master mode. Normally, set this bit to
1.
NALE Bit (NACK Transmission Arbitration-Lost Detection Enable)
This bit is used to specify whether to cause arbitration to be lost when ACK is detected during transmission of NACK in
receive mode (such as when slaves with the same address exist on the bus or when two or more masters select the same
slave device simultaneously with different number of receive bytes).
SALE Bit (Slave Arbitration-Lost Detection Enable)
This bit is used to specify whether to cause arbitration to be lost when a value different from the value being transmitted
is detected on the bus in slave transmit mode (such as when slaves with the same address exist on the bus or when a
mismatch with the transmit data occurs due to noise).
Address(es): RIIC0.ICFER 0008 8305h
b7 b6 b5 b4 b3 b2 b1 b0
— SCLE NFE NACKE SALE NALE MALE TMOE
Value after reset:
01110010
Bit Symbol Bit Name Description R/W
b0 TMOE Timeout Function Enable 0: The timeout function is disabled.
1: The timeout function is enabled.
R/W
b1 MALE Master Arbitration-Lost
Detection Enable
0: Master arbitration-lost detection is disabled.
(Disables the arbitration-lost detection function and does not clear the
ICCR2.MST and TRS bits automatically when arbitration is lost.)
1: Master arbitration-lost detection is enabled.
(Enables the arbitration-lost detection function and clears the
ICCR2.MST and TRS bits automatically when arbitration is lost.)
R/W
b2 NALE NACK Transmission
Arbitration-Lost Detection
Enable
0: NACK transmission arbitration-lost detection is disabled.
1: NACK transmission arbitration-lost detection is enabled.
R/W
b3 SALE Slave Arbitration-Lost
Detection Enable
0: Slave arbitration-lost detection is disabled.
1: Slave arbitration-lost detection is enabled.
R/W
b4 NACKE NACK Reception Transfer
Abort Enable
0: Transfer operation is not aborted during NACK reception (transfer
abort disabled).
1: Transfer operation is aborted during NACK reception (transfer abort
enabled).
R/W
b5 NFE Digital Noise Filter Circuit
Enable
0: No digital noise filter circuit is used.
1: A digital noise filter circuit is used.
R/W
b6 SCLE SCL Synchronous Circuit
Enable
0: No SCL synchronous circuit is used.
1: An SCL synchronous circuit is used.
R/W
b7 — Reserved This bit is read as 0. The write value should be 0. R/W
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