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2.1 PIN FUNCTIONS OF THE µPD750008
Input/
Pin
output
P00
Input
INT4
P01
I/O
SCK
P02
I/O
SO/SB0
P03
I/O
SI/SB1
P10
Input
INT0
P11
INT1
P12
INT2
P13
TI0
P20
I/O
PTO0
P21
PTO1
P22
PCL
P23
BUZ
Note 2
P30
I/O
(MD0)
Note 2
P31
(MD1)
Note 2
P32
(MD2)
Note 2
P33
(MD3)
Notes 1. I/O circuits enclosed in circles have a Schmitt-triggered input.
2. An LED can be driven directly.
3. ( ): µPD75P0016
CHAPTER 2 PIN FUNCTIONS
Table 2-1. Digital I/O Port Pins (1/2)
Also
used
as
4-bit input port (PORT0).
For P01 to P03, built-in pull-up resistors
can be connected by software in units of
3 bits.
4-bit input port (PORT1).
Built-in pull-up resistors can be connected
by software in units of 4 bits. Only the
P10/INT0 pin is provided with noise
elimination function.
4-bit I/O port (PORT2).
Built-in pull-up resistors can be connected
by software in units of 4 bits.
Note 3
Programmable 4-bit I/O port (PORT3).
Note 3
I/O can be specified bit by bit.
Note 3
Built-in pull-up resistors can be connected
Note 3
by software in units of 4 bits.
CHAPTER 2 PIN FUNCTIONS
Function
I/O
8 bit
Upon
circuit
I/O
reset
Note 1
type
x
Input
B
F -A
F -B
M -C
x
Input
B -C
x
Input
E-B
x
Input
E-B
2
9
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