µPD75304B,75306B,75308B
3.1 PORT PINS (2/2)
After
Reset
Dual-
Function Pin
I/O Circuit
Type *1
Pin Name
Function
Input/Output
Input/output
8-bit I/O
P60
P61
P62
P63
P70
P71
P72
P73
BP0
BP1
BP2
BP3
BP4
BP5
BP6
BP7
KR0
KR1
KR2
KR3
KR4
KR5
KR6
KR7
S24
S25
S26
S27
S28
S29
S30
S31
Programmable 4-bit input/output port (PORT 6)
Input/output can be specified bit-wise.
On-chip pull-up resistor can be specified as a
4-bit unit by software.
Input
Input
F - A
4-bit input/output port (PORT 7)
On-chip pull-up resistor can be specified as a
4-bit unit by software.
Input/output
F - A
Output
1-bit output port (BIT PORT)
Also used as segment output pin.
×
* 2
G - C
Output
*
1.
: Schmitt trigger input
2. BP0 to BP7 select VLC1 as the input source.
However, the output level depends on BP0 to BP7 and VLC1 external circuit.
Example BP0 to BP7 are connected mutually within the µPD75308B. Therefore, the output level of BP0 to BP7
is determined by the value of R1, R2 and R3.
µPD75308B
V
DD
R2
BP0
BP1
ON
ON
V
LC1
R1
R3
10
NEC [ NEC ]
