Renesas M16C/6NK Informações Técnicas Página 185

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Rev.2.10 Apr 14, 2006 page 161 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 15. Serial Interface
Table 15.3 lists the I/O Pin Functions (when not select multiple transfer clock output pin select function) in
clock synchronous serial I/O mode. Table 15.4 lists the P6_4 Pin Functions in clock synchronous serial I/O
mode.
Note that for a period from when the UARTi operating mode is selected to when transfer starts, the TXDi
pin outputs an H.
Figure 15.11 shows the Transmit/Receive Operation during clock synchronous serial I/O mode.
Table 15.3 I/O Pin Functions (when not select multiple transfer clock output pin select function)
i = 0 to 2
Table 15.4 P6_4 Pin Functions
TXDi
(P6_3, P6_7, P7_0)
RXDi
(P6_2, P6_6, P7_1)
CLKi
(P6_1, P6_5, P7_2)
_________ ________
CTSi/RTSi
(P6_0, P6_4, P7_3)
Pin Name Function Method of Selection
Serial data output
Serial data input
Transfer clock output
Transfer clock input
________
CTS input
________
RTS output
I/O port
(Outputs dummy data when performing reception only)
Bits PD6_2 and PD6_6 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 = 1
Bits PD6_1 and PD6_5 in PD6 register = 0
PD7_2 bit in PD7 register = 0
CRD bit in UiC0 register = 0
CRS bit in UiC0 register = 0
Bits PD6_0 and PD6_4 in PD6 register = 0
PD7_3 bit in PD7 register = 0
CRD bit = 0
CRS bit = 1
CRD bit = 1
-: 0 or 1
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).
2. When the CLKMD1 bit = 1 and the CLKMD0 bit = 0, the following logic levels are output:
High if the CLKPOL bit in the U1C0 register = 0
Low if the CLKPOL bit = 1
Bit set Value
Pin Function U1C0 Register UCON Register PD6 Register
CRD bit CRS bit RCSP bit CLKMD1 bit CLKMD0 bit PD6_4 bit
P6_4 1 - 0 0 - Input: 0, Output: 1
_________
CTS1 0 0 0 0 - 0
_________
RTS1 0 1 0 0 - -
_________
CTS0
(1)
0010- 0
CLKS1 - - - 1
(2)
1-
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