RL78/G13 CHAPTER 4 PORT FUNCTIONS
R01UH0146EJ0100 Rev.1.00 168
Sep 22, 2011
Table 4-3. Settings of Registers When Using Port 0
Pin Name
Name I/O
PM0× PIM0× POM0× PMC0× Alternate Function Setting Remark
Input 1
− ×
0
Note 1
×
0 0
0
Note 1
CMOS output
P00
Output
0 1
0
Note 1
TxD1 output = 1
Note 3
N-ch O.D. output
1 0
−
0
Note 1
×
CMOS input
Input
1 1
0
Note 1
×
TTL input
P01
Output 0
×
0
Note 1
TO00 output = 0
Note 4
Input 1
− ×
0
Note 2
×
0 0
0
Note 2
CMOS output
P02
Output
0 1
0
Note 2
SO10/TxD1 output = 1
Note 5
N-ch O.D. output
1 0
×
0
Note 2
×
CMOS input
Input
1 1
×
0
Note 2
×
TTL input
0
×
0
0
Note 2
CMOS output
P03
Output
0
×
1
0
Note 2
SDA10 output = 1
Note 5
N-ch O.D. output
1 0
× − ×
CMOS input Input
1 1
×
×
TTL input
0
×
0 CMOS output
P04
Output
0
×
1
SCK10/SCL10 output = 1
Note 5
N-ch O.D. output
Input 1
− − −
P05, P06
Output 0
TO05 output, TO06 output = 0
Note 6
Input 1
− − −
P07
Output 0
−
Notes 1. 20-, 24-, 25-, 30-, 32-pin products only
2. 52-, 64-, 80-, 100-, 128-pin products only
3. To use P00/TxD1 as a general-purpose port in 20- to 48-pin products, set serial channel enable status
register 0 (SE0), serial output register 0 (SO0) and serial output enable register 0 (SOE0) to the default
status.
4. To use P01/TO00 as a general-purpose port, set bit 0 (TO00) of timer output register 0 (TO0) and bit 0
(TOE00) of timer output enable register 0 (TOE0) to “0”, which is the same as their default status setting.
5. To use P02/SO10/TxD1/ANI17, P03/SI10/RxD1/SDA10/ANI16, or P04/SCK10/SCL10 as a general-
purpose port, set serial channel enable status register 0 (SE0), serial output register 0 (SO0) and serial
output enable register 0 (SOE0) to the default status.
6. 64-, 80-pin products only
Remark ×: don’t care
PM0×: Port mode register 0
PIM0×: Port input mode register 0
POM0×: Port output mode register 0
PMC0×: Port mode control register 0
<R>
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