UPD78F9177 Datasheet, PDF (11/56 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78F9177, 78F9177Y
3. PIN FUNCTIONS
3.1 Port Pins
Pin Name
I/O
Function
After Reset Alternate Function
P00 to P05
I/O Port 0
Input
−
6-bit input/output port
Input/output mode can be specified in 1-bit units
When used as an input port, an on-chip pull-up resistor can be
specified by software.
P10, P11
I/O Port 1
Input
−
2-bit input/output port
Input/output mode can be specified in 1-bit units
When used as an input port, an on-chip pull-up resistor can be
specified by software.
P20
I/O Port 2
Input
SCK20/ASCK20
P21
7-bit input/output port
Input/output mode can be specified in 1-bit units
SO20/TxD20
P22
For P20 to P22, P25, and P26, an on-chip pull-up resistor can be
SI20/RxD20
P23
specified by software.
Only P23 and P24 can be used as N-ch open-drain
P24
input/output port pins.
SCL0 ^Note
SDA0 ^Note
P25
TI80/SS20
P26
TO80
P30
I/O Port 3
P31
4-bit input/output port
Input/output mode can be specified in 1-bit units
P32
On-chip pull-up resistor can be specified by software.
P33
Input
INTP0/TI81/CPT90
INTP1/TO81
INTP2/TO90
INTP3/TO82/BZO90
P50 to P53
I/O Port 5
4-bit N-ch open-drain input/output port
Input/output mode can be specified in 1-bit units
Input
−
P60 to P67
Input
Port 6
8-bit input-only port
Input
ANI0 to ANI7
Note µPD78F9177Y only
Data Sheet U14022EJ1V0DS00
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