Renesas M16C/60 Series Hardware Manual page 165

Under development
This document is under development and its contents are subject to change.
M16C/6N5 Group
Table 1.15.7 lists the functions of the input/output pins during UART mode. Table 1.15.8 lists the P6
functions during UART mode. Note that for a period from when the UARTi operation mode is selected to
when transfer starts, the TxDi pin outputs an "H". (If the N channel open-drain output is selected, this pin
is in a high-impedance state.)
Figure 1.15.15 shows the typical transmit timings in UART mode. Figure 1.15.16 shows the typical receive
timing in UART mode.
Table 1.15.7 I/O Pin Functions
Pin name
TxD Serial data output
i
(P6 , P6 , P7 )
3 7 0
RxD Serial data input
i
(P6 , P6 , P7 )
2 6 1
CLK I/O port
i
(P6 , P6 , P7 )
Transfer clock input
1 5 2
________ ________
_______
CTS /RTS
CTS input
i i
(P6 , P6 , P7 )
0 4 3
________
RTS output
I/O port
i = 0 to 2
Table 1.15.8 P6 Pin Functions
4
Pin function
CRD
P6
4
_________
CTS
1
_________
RTS
1
_________
CTS (Note)
0
Note : In addition to this, set the U0C0 register's CRD bit to "0" (CTS
register's CRS bit to "1" (RTS
Rev.1.00 2003.05.30 page 151
Function
(Outputs dummy data when performing reception only)
PD6 register's PD6_2 bit = 0, PD6_6 bit = 0
PD7 register's PD7_1 bit = 0
(Can be used as an input port when performing transmission only)
UiMR register's CKDIR bit = 0
UiMR register's CKDIR bit = 1
PD6 register's PD6_1 bit = 0, PD6_5 bit = 0
PD7 register's PD7_2 bit = 0
UiC0 register's CRD bit = 0
UiC0 register's CRS bit = 0
PD6 register's PD6_0 bit = 0, PD6_4 bit = 0
PD7 register's PD7_3 bit = 0
UiC0 register's CRD bit = 0
UiC0 register's CRS bit = 1
UiC0 register's CRD bit = 1
U1C0 register
CRS RCSP
1 -
0 0
0 1
0 0
_________
selected).
0
Method of selection
Bit set value
UCON register
CLKMD1
0 0
0 0
0 0
1 0
_________ _________
Serial I/O (UART Mode)
PD6 register
PD6_4
Input: 0, Output: 1
0
-
0
/RTS enabled) and the U0C0
0 0
pin
4