RL78/G1P
CHAPTER 12 SERIAL INTERFACE IICA
R01UH0895EJ0100 Rev.1.00
469
Nov 29, 2019
(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.
Remarks 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)
2.
n = 0, 1