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UPD75P4308 Datasheet(PDF) 6 Page - NEC

Part # UPD75P4308
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD75P4308 Datasheet(HTML) 6 Page - NEC

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µPD75P4308
6
3.
PIN FUNCTIONS
3.1 Port Pins (1/2)
Pin name
I/O
Alternate
Function
8-bit
After
I/O Circuit
function
I/O
reset
typeNote 1
P00
Input
INT4
No
Input
<B>
P01
I/O
SCK
<F>-A
P02
I/O
SO/SB0
<F>-B
P03
Input
SI
<B>-C
P10
Input
INT0
No
Input
<B>-C
P11
INT1
P12
INT2
P13
TI0/TI1
P20
I/O
PTO0
No
Input
E-B
P21
PTO1
P22
PCL
P23
P30
I/O
MD0
No
Input
E-B
P31
MD1
P32
MD2
P33
MD3
P50Note 2
I/O
D4
No
High-
M-E
P51Note 2
D5
impedance
P52Note 2
D6
P53Note 2
D7
Notes 1. Circuit types in brackets indicate Schmitt trigger input.
2. Low-level input leakage current increases when input instructions or bit manipulation instructions are
executed.
4-bit I/O port (PORT2).
Connections of on-chip pull-up resistors are
software-specifiable in 4-bit units.
4-bit input port (PORT1).
Connections of on-chip pull-up resistors are
software-specifiable in 4-bit units.
Noise elimination circuit can be selected
only for P10/INT0.
N-ch open-drain 4-bit input/output port
(PORT5).
13-V withstand during open-drain.
Data input/output pin for program memory
(PROM) write/verify (upper 4 bits).
Programmable 4-bit I/O port (PORT3).
Input and output can be specified in single-
bit units.
Connections of on-chip pull-up resistors are
software-specifiable in 4-bit units.
4-bit input port (PORT0).
For P01 to P03, connections of on-chip pull-
up resistors are software-specificable in 3-
bit units.


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