C Bus Extended Control Register (Icxr) - Renesas H8S Series Hardware Manual

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16.3.8 I

C Bus Extended Control Register (ICXR)

ICXR enables or disables the I
operation, and indicates the status of receive/transmit operations.
Bit Bit Name Initial Value R/W
7 STOPIM 0
6 HNDS 0
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C bus interface interrupt generation and continuous receive
Description
R/W Stop Condition Interrupt Source Mask
Enables or disables the interrupt generation when the stop
condition is detected in slave mode.
0: Enables IRIC flag setting and interrupt generation when
the stop condition is detected (STOP = 1 or ESTP = 1) in
slave mode.
1: Disables IRIC flag setting and interrupt generation when
the stop condition is detected.
R/W Handshake Receive Operation Select
Enables or disables continuous receive operation in
receive mode.
0: Enables continuous receive operation
1: Disables continuous receive operation
When the HNDS bit is cleared to 0, receive operation is
performed continuously after data has been received
successfully while ICDRF flag is 0.
When the HNDS bit is set to 1, SCL is fixed to the low level
and the next data transfer is disabled after data has been
received successfully while the ICDRF flag is 0. The bus
line is released and next receive operation is enabled by
reading the receive data in ICDR.
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Section 16 I C Bus Interface (IIC)
Rev. 3.00 Jul. 14, 2005 Page 531 of 986
REJ09B0098-0300