
RL78/G13
CHAPTER 2 PIN FUNCTIONS
R01UH0146EJ0100 Rev.1.00
68
Sep 22, 2011
(2/3)
Function Name
I/O
Function
After Reset
Alternate Function
P40
TOOL0
P41
P42
TI04/TO04
P43
SCK01/SCL01
P44
SI01/SDA01
P45
SO01
P46
INTP1/TI05/TO05
P47
I/O
Port 4.
8-bit I/O port.
Input of P43 and P44 can be set to TTL input buffer.
Output of P43 to P45 can be set to N-ch open-drain output
(VDD tolerance).
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input port
INTP2
P50
SI11/SDA11
P51
SO11
P52
SO31
P53
SI31/SDA31
P54
SCK31/SCL31
P55
(PCLBUZ1)/(SCK00)
P56
(INTP1)
P57
I/O
Port 5.
8-bit I/O port.
Input of P53 to P55 can be set to TTL input buffer.
Output of P50, P52 to P55 can be set to N-ch open-drain
output (VDD tolerance).
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input port
(INTP3)
P60
SCLA0
P61
SDAA0
P62
SCLA1
P63
SDAA1
P64
TI10/TO10
P65
TI11/TO11
P66
TI12/TO12
P67
I/O
Port 6.
8-bit I/O port.
Output of P60 to P63 can be set to N-ch open-drain output (6
V tolerance).
Input/output can be specified in 1-bit units.
For P64 to P67, use of an on-chip pull-up resistor can be
specified by a software setting.
Input port
TI13/TO13
P70
KR0/SCK21/SCL21
P71
KR1/SI21/SDA21
P72
KR2/SO21
P73
KR3
P74
KR4/INTP8
P75
KR5/INTP9
P76
KR6/INTP10/(RxD2)
P77
I/O
Port 7.
8-bit I/O port.
Output of P71 and P74 can be set to N-ch open-drain output
(VDD tolerance).
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input port
KR7/INTP11/(TxD2)
P80
(SCK10)/(SCL10)
P81
(SI10)/(RxD1)/(SDA10)
P82
(SO10)/(TxD1)
P83
P84
(INTP6)
P85
(INTP7)
P86
(INTP8)
P87
I/O
Port 8.
8-bit I/O port.
Input of P80 and P81 can be set to TTL input buffer.
Output of P80 to P82 can be set to N-ch open-drain output
(VDD tolerance).
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input port
(INTP9)
Remark Functions in parentheses in the above figure can be assigned via settings in the peripheral I/O redirection
register (PIOR).