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CHAPTER 11 SERIAL INTERFACE FUNCTION
376
User’s Manual U15109EJ3V0UD
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After reset: 00H
R/W
Address: FFFFF340H, FFFFF350H
<7>
<6>
<5>
<4>
<3>
<2>
<1>
<0>
IICCn
IICEn
LRELn
WRELn
SPIEn
WTIMn
ACKEn
STTn
SPTn
(n = 0, 1)
IICEn
I
2
Cn operation enable/disable specification
0
Operation stopped. IIC status register n (IICSn) preset. Internal operation stopped.
1
Operation enabled.
Condition for clearing (IICEn = 0)
Condition for setting (IICEn = 1)
•
Cleared by instruction
•
When RESET is input
•
Set by instruction
LRELn
Exit from communications
0
Normal operation
1
This exits from the current communication operation and sets standby mode. This setting is automatically cleared
after being executed. Its uses include cases in which a locally irrelevant extension code has been received.
The SCLn and SDAn lines are set for high impedance.
The following flags are cleared.
•
STDn
•
ACKDn
•
TRCn
•
COIn
•
EXCn
•
MSTSn
•
STTn
•
SPTn
The standby mode following exit from communications remains in effect until the following communication entry conditions
are met.
•
After a stop condition is detected, restart is in master mode.
•
An address match or extension code reception occurs after the start condition.
Condition for clearing (LRELn = 0)
Note
Condition for setting (LRELn = 1)
•
Automatically cleared after execution
•
When RESET is input
•
Set by instruction
Note
This flag’s signal is invalid when IICEn = 0.
Remark
STDn:
Bit 1 of IIC state register n (IICSn)
ACKDn:
Bit 2 of IIC state register n (IICSn)
TRCn:
Bit 3 of IIC state register n (IICSn)
COIn:
Bit 4 of IIC state register n (IICSn)
EXCn:
Bit 5 of IIC state register n (IICSn)
MSTSn:
Bit 7 of IIC state register n (IICSn)