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UPD780034 Datasheet(PDF) 9 Page - NEC

Part # UPD780034
Description  8-BIT SINGLE-CHIP MICROCONTROLLER
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD780034 Datasheet(HTML) 9 Page - NEC

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µPD780016Y, 780018Y
9
3. PIN FUNCTIONS
3.1 Port Pins (1/2)
Function
Pin Name
I/O
Port 0
7-bit I/O port
Input
Input/
output
P00
P01
P02
P03
P04
P05
P06
P10 to P17
P20
P21
P22
P23
P24
P25-P27
P30
P31
P32
P33
P34
P35
P36
P37
P40 to P47
Port 1
8-bit input port
On-chip pull-up resistor can be used by software.Note
Input
Input
Input/
output
Port 2
8-bit input/output port
Input/output can be specified bit-wise.
When used as an input port, on-chip pull-up resistor can be used by software.
Port 3
8-bit input/output port
Input/output can be specified bit-wise.
When used as an input port, on-chip pull-up resistor can be used by software.
Input/
output
Input/
output
Port 4
8-bit input/output port
Input/output can be specified in 8-bit units.
When used as an input port, on-chip pull-up resistor can be used by software.
Test input flag (KRIF) is set to 1 by falling edge detection.
Input
Input
Input only
Input/output can be specified bit-wise.
When used as an input port, on-chip pull-up resistor
can be used by software.
Alternate
Function Pin
After
Reset
Input
Input
INTP0/TI00
INTP1/TI01
INTP2
INTP3
INTP4
INTP5
INTP6
ANI0 to
ANI7
SI1
SO1
SCK1
STB
BUSY
—
TO0
TO1
TO2
TI1
TI2
PCL
BUZ
—
AD0 to AD7
Input
Note
When using the P10/ANI0 to P17/ANI7 pins as the A/D converter analog input, on-chip pull-up resistor is
automatically disconnected.


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