Renesas M16C Series User Manual page 95

M30245 Group
Following are some examples in which various functions (a) through (c) are selected:
• Transmission Operation WITH: outputting transmission data at falling edge of transfer clock, no
clock delay, master mode
• Reception Operation WITH: inputting reception data at rising edge of transfer clock, clock delay,
master mode
• Transmission Operation WITH: outputting transmission data at falling edge of transfer clock, no
clock delay, slave mode
• Reception Operation WITH: inputting reception data at rising edge of transfer clock, clock delay,
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slave mode
(6) Input to the serial interface special function and the direction register
To input an external signal to the serial interface special function, set the direction register of the
relevant port to input.
(7) Pins related to the serial interface special function
• CLK
• RxD
• TxD
(8) Registers related to the serial I/O
Figure 2.5.1 shows the memory map of serial interface special function-related registers, and Figures
2.5.2 to 2.5.7 show serial interface special function-related registers.
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
, CLK , CLK , CLK pins
0 1 2 3
/SRxD , RxD /SRxD , RxD
0 0 1 1
/STxD , TxD /STxD , TxD
0 0 1 1
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Input/output pins for the transfer clock
/SRxD , RxD /SRxD pins
2 2 3 3
Input pins for data
/STxD , TxD /STxD pins
2 2 3 3
Output pins for data
2. Serial Interface Special Function