M16C62_M Datasheet, PDF (389/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

Clock-Synchronous Serial I/O
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
2.4.5 Precautions for Serial I/O (in clock-synchronous serial I/O)
Transmission/reception
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(1) With an external clock selected, and choosing the RTS function, the output level of the RTSi
pin goes to “L” when the data-receivable status becomes ready, which informs the transmis-
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sion side that the reception has become ready. The output level of the RTSi pin goes to “H”
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when reception starts. So if the RTSi pin is connected to the CTSi pin on the transmission
side, the circuit can transmission and reception data with consistent timing. With the internal
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clock, the RTS function has no effect. Figure 2.4.16 shows an example of wiring.
Transmitter side IC
TxDi
RxDi
CLKi
CTSi
Figure 2.4.16. Example of wiring
Receiver side IC
TxDi
RxDi
CLKi
RTSi
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