NEC 78K0 User Manual page 76

8-bit single-chip microcontrollers
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Pin Name
I/O
P00
I/O
P01
P10
I/O
P11
P12
P13
P14
P15
P16
P17
P20 to P27
Input
P30 to P32
I/O
P33
P60 to P63
I/O
P70 to P73
I/O
P120
I/O
P130
Output
76
CHAPTER 4 PORT FUNCTIONS
Table 4-2. Port Functions
Function
Port 0.
2-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Port 1.
8-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Port 2.
8-bit input-only port.
Port 3.
4-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Port 6.
4-bit I/O port (N-ch open drain).
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a mask
option only for mask ROM versions.
Port 7.
4-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Port 12.
1-bit I/O port.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Port 13.
1-bit output-only port.
User's Manual U16227EJ2V0UD
After Reset
Alternate Function
Input
TI000
TI010/TO00
Input
SCK10/TxD0
SI10/RxD0
SO10
TxD6
RxD6
TOH0
TOH1/INTP5
TI50/TO50
Input
ANI0 to ANI7
Input
INTP1 to INTP3
INTP4/TI51/TO51
Input
Input
KR0 to KR3
Input
INTP0
Output

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