— 39 —
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33 to 36
I/O
–
I
I
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I/O
I/O
I
–
–
I
I
I
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Function
Ground potential.
External crystal/ceramic oscillator for system clock oscillation is connected to this pin.
In the case of external clock, connect it to X1 and connected its inverted phase signal to X2.
System reset input. (Low-level active).
Programmable 4-bit input/output port (PORT3).
Input/output can be specified in units of bit.
Connection of the internal pull-up resistors can be specified by software in units of 4-bits.
2-bit input/output port (PORT8).
Connection of the internal pull-up resistors can be specified by software in units of 2-bits.
4-bit input/output port (PORT2).
Connection of the internal pull-up resistors can be specified by software in units of 4-bits.
4-bit input port (PORT0).
Connection of the internal pull-up resistors for P01 to P03 can be specified by software in units of 3-bits.
Internally connected. Connect this pin to VDO directly.
Positive power supply.
4-bit input port (PORT1).
Connection of the internal pull-up resistors can be specified by software.
P10/INT0 have the noise rejection function.
4-bit input/output port (PORT7).
Connection of the internal pull-up resistors can be specified by software in units of 4-bits.
Programmable 4-bit input/output port (PORT6).
Input/output can be specified in units of bit.
Connection of the internal pull-up resistors can be specified by software in units of 4-bits.
N-ch open drain 4-bit input/output port (PORT5).
Pull-up resistor can be internally connected in units of bit (Mask option).
13 V withstand voltage in the open drain connection.
Pin Name
Vss
X1
X2
RESET
P33
NOTE
P32
NOTE
P31
NOTE
P30
NOTE
P81
P80
P23
P22
P21
P20
P03
P02
P01
P00
IC
VDD
P10
P11
P12
P13
P73
P72
P71
P70
P63
P62
P61
P60
P50 to P53
6-9. IC PIN FUNCTION
• TUNER BOARD IC8 µPD754302GS
Note
1. The white round mark (O) indicated Schmidt trigger input.
2. LED can be directly driven.
3. When the internal pull-up resistor is not used by mask option (when it is used as N-ch open drain input port), the low level input leak
current increases when input instruction and bit operation instruction are performed.
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