Renesas M16C/6NK Hardware Manual page 187

16-bit single-chip microcomputer m16c family / m16c/60 series
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M16C/6N Group (M16C/6NK, M16C/6NM)
Table 15.7 lists the functions of the input/output pins during UART mode. Table 15.8 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".
Figure 15.17 shows the typical transmit timings in UART mode. Figure 15.18 shows the typical receive
timing in UART mode.
Table 15.7 I/O Pin Functions
Pin Name
TXDi
Serial Data Output
(P6_3, P6_7, P7_0)
RXDi
Serial Data Input
(P6_2, P6_6, P7_1)
CLKi
I/O Port
(P6_1, P6_5, P7_2)
Transfer Clock Input
________ ________
_______
CTSi/RTSi
CTS Input
(P6_0, P6_4, P7_3)
________
RTS Output
I/O Port
i = 0 to 2
Table 15.8 P6_4 Pin Functions
Pin Function
CRD bit
P6_4
_________
CTS1
_________
RTS1
_________
(1)
CTS0
-: "0" or "1"
NOTE:
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).
Rev.2.00
Nov 28, 2005
REJ09B0124-0200
Function
(Outputs "H" when performing reception only)
PD6_2 and PD6_6 bits in PD6 register = 0
PD7_1 bit in PD7 register = 0
(Can be used as an input port when performing transmission only)
CKDIR bit in UiMR register = 0
CKDIR bit in UiMR register = 1
PD6_1 and PD6_5 bits in PD6 register = 0
PD7_2 bit in PD7 register = 0
CRD bit in UiC0 register = 0
CRS bit in UiC0 register = 0
PD6_0 and PD6_4 bits in PD6 register = 0
PD7_3 bit in PD7 register = 0
CRD bit = 0
CRS bit = 1
CRD bit = 1
U1C0 Register
CRS bit
RCSP bit CLKMD1 bit
1
-
0
0
0
1
0
0
_________
page 169 of 378
Method of Selection
Bit set Value
UCON Register
0
0
0
0
0
0
1
0
__________ _________
15. Serial Interface
PD6 Register
PD6_4 bit
Input: 0, Output: 1
0
-
0

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