UPD78F9418A NEC, UPD78F9418A Datasheet - Page 33
UPD78F9418A
Manufacturer Part Number
UPD78F9418A
Description
(UPD7894xxA) 8-Bit Single Chip Microcontrollers
Manufacturer
NEC
Datasheet
1.UPD78F9418A.pdf
(319 pages)
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2.1 List of Pin Functions
P00 to P03
P20
P21
P22
P23
P24
P25
P26
P27
P40 to P45
P46, P47
P50 to P53
P60
P61
P62 to P66
P80 to P87
P90 to P93
Pin Name
(1)
Port pins
I/O
I/O
I/O
I/O
Input
I/O
I/O
I/O
Port 0.
4-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, use of an on-chip pull-up resistor
can be specified by setting pull-up resistor option register 0
(PU0).
Port 2.
8-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, use of an on-chip pull-up resistor
can be specified by setting pull-up resistor option register 1
(PU1).
Port 4.
8-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, use of an on-chip pull-up resistor
can be specified by setting pull-up resistor option register 0
(PU0).
Port 5.
4-bit N-ch open-drain I/O port.
Input/output can be specified in 1-bit units.
For a mask ROM version, use of an on-chip pull-up resistor can
be specified by the mask option.
Port 6.
7-bit input port.
Port 8.
8-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, use of an on-chip pull-up resistor
can be specified by setting pull-up resistor option register 2
(PU2).
Port 9.
4-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, use of an on-chip pull-up resistor
can be specified by setting pull-up resistor option register 2
(PU2).
CHAPTER 2 PIN FUNCTIONS
User’s Manual U13952EJ3V0UD
Function
Input
Input
Input
Input
Input
Input
Input
After Reset
SCK/ASCK
SO/TxD
SI/RxD
CMPTOUT0/TO2
INTP0/TI0
INTP1/TI1
INTP2/TO5
INTP3/CPT5
KR0 to KR5
ANI0/CMPIN0
ANI1/CMPREF0
ANI2 to ANI6
S27 to S20
S19 to S16
Alternate Function
−
−
−
33
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