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M16C/64A Group
Figure 23.32 Serial Bus Communication Control Example in Special Mode 2 (UART2)
Table 23.21
I/O Pin Functions in Special Mode 2
Pin Name
I/O
CLKi
Output Clock output
TXDi
Output Serial data output
Input
RXDi
Input
i = 0 to 2, 5 to 7
Pins CTSi / RTSi are not used. (They can be used as I/O ports.)
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
P1_3
P1_2
P7_2 (CLK2)
P7_1 (RXD2)
P7_0 (TXD2)
MCU (master)
Function
Serial data input
Input port
23. Serial Interface UARTi (i = 0 to 2, 5 to 7)
SS
CLK
RXD
TXD
MCU (slave)
SS
CLK
RXD
TXD
MCU (slave)
Method of Selection
The CKDIR bit in the UiMR register = 0
(Dummy data is output when performing reception only.)
Set the port direction bits sharing pins to 0.
Set the port direction bits sharing pins to 0. (can be used as
an input port only when transmitting)
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