Table of Contents
Advertisement
M16C/62P Group (M16C/62P, M16C/62PT)
Table 17.7 lists the functions of the input/output pins during UART mode. Table 17.8 lists the P6_4 pin
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).
Table 17.7 I/O Pin Functions
Pin Name
Serial Data Output
TXDi (i = 0 to 2)
(P6_3, P6_7,
P7_0)
RXDi
Serial Data Input
(P6_2, P6_6,
P7_1)
CLKi
Input/Output Port
(P6_1, P6_5,
P7_2)
Transfer Clock Input
CTS Input
CTSi/RTSi
(P6_0, P6_4,
P7_3)
RTS Output
Input/Output Port
Table 17.8 P6_4 Pin Functions
Pin Function
U1C0 Register
CRD
P6_4
CTS1
RTS1
(1)
CTS0
NOTES :
1. In addition to this, set the CRD bit in the U0C0 register to "0" (CTS0/RTS0
enabled) and the CRS bit in the U0C0 register to "1" (RTS0 selected).
R
e
. v
2
3 .
0
S
e
p
0
, 1
2
0
0
4
R
E
J
0
9
B
0
1
8
5
0 -
2
3
0
Z
Function
("H" outputs when performing reception only)
PD6_2 bit and PD6_6 bit in the PD6 register = 0, PD7_1 bit in the PD7 register = 0
(Can be used as an input port when performing transmission only)
CKDIR bit in the UiMR register = 0
CKDIR bit = 1
PD6_1 bit and PD6_5 bit in the PD6 register = 0, PD7_2 bit in the PD7 register = 0
CRD bit in the UiC0 register = 0
CRS bit in the UiC0 register = 0
PD6_0 bit and PD6_4 bit in the PD6 register = 0, PD7_3 bit in the PD7 register = 0
CRD bit = 0
CRS bit = 1
CRD bit = 1
Bit Set Value
UCON Register
CRS
RCSP
1
0
0
0
0
0
1
0
0
0
1
page 174
f o
3
6
4
Method of Selection
PD6 Register
PD6_4
CLKMD1
0
Input: 0, Output: 1
0
0
0
0
0
: "0" or "1"
17. Serial I/O
Advertisement
Table of Contents
