Chapter 13
Serial Interface
XIII - 48 Full-duplex UART Communication
13.4.2 Operation
Circuit Initialization (Serial Reset)
SCIFn has a built-in serial reset function for abnormal operation.
Registers other than TXBUFn and SCnMD2.SCnBRKE must be changed during serial reset.
SCnSTR and SCnMD2.SCnBRKF are initialized by setting both SCnMD3.SCnRSTN and SCnMD3.SCnRSRN
to "0".
Pin Settings
<1-wire communication>
At data reception: Set SCnMD1.SCnSBIS to "1" and SCnMD1.SCnSBOS to "0".
At data transmission: Set SCnMD1.SCnSBIS to "0" and SCnMD1.SCnSBOS to "1".
(When SCnMD1.SCnIOM is "1", data reception via SBOn is enabled.)
<2-wire communication>
Set both SCnMD1.SCnSBIS and SCnMD1.SCnSBOS to "1". (SCnIOM must be set to "0".)
In UART communication, set SCnMD1.SCnSBTS and SCnMD3.SCnSBCSEN to "0".
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In time-division 1-wire communication with SBOn, be sure to prevent data collision at SBOn.
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When the LSI only send data (not receive data), set SCnMD1.SCnSBIS to "0".
When the LSI only receive data (not send data), set SCnMD1.SCnSBOS to "0".
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