CHAPTER 15 SERIAL INTERFACE IICA
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(9) ACK generator, stop condition detector, start condition detector, and ACK detector
These circuits generate and detect each status.
(10) Data hold time correction circuit
This circuit generates the hold time for data corresponding to the falling edge of the serial clock.
(11) Start condition generator
This circuit generates a start condition when the STTn bit is set to 1.
However, in the communication reservation disabled status (IICRSVn bit = 1), when the bus is not released
(IICBSYn bit = 1), start condition requests are ignored and the STCFn bit is set to 1.
(12) Stop condition generator
This circuit generates a stop condition when the SPTn bit is set to 1.
(13) Bus status detector
This circuit detects whether or not the bus is released by detecting start conditions and stop conditions.
However, as the bus status cannot be detected immediately following operation, the initial status is set by the
STCENn bit.
Remark 1.
STTn bit:
Bit 1 of IICA control register n0 (IICCTLn0)
SPTn bit:
Bit 0 of IICA control register n0 (IICCTLn0)
IICRSVn bit: Bit 0 of IICA flag register n (IICFn)
IICBSYn bit: Bit 6 of IICA flag register n (IICFn)
STCFn bit:
Bit 7 of IICA flag register n (IICFn)
STCENn bit: Bit 1 of IICA flag register n (IICFn)
Remark 2.
n = 0, 1
Содержание RL78/G1H
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