Pin Functions; Port Pins - NEC uPD75P308 Datasheet

1. PIN FUNCTIONS

1.1 PORT PINS

Also Served
Pin Name Input/Output
As
P00 Input INT4
P01 Input/Output SCK
P02 Input/Output SO/SB0
P03 Input/Output SI/SBI
P10 INT0
P11 INT1
Input
P12 INT2
P13
P20 PTO0
P21
Input/Output
P22 PCL
P23 BUZ
LCDCL
P30* 2
SYNC MD1
P31* 2
Input/Output
2
P32* MD2
P33* 2 MD3
P40-43* 2 Input/Output
P50-P53* 2 Input/Output
P60 KR0
P61 KR1
Input/Output
P62 KR2
P63 KR3
P70 KR4
P71 KR5
Input/Output
P72 KR6
P73 KR7
BP0 S24
BP1 S25
Output
BP2 S26
BP3 S27
BP4 S28
BP5 S29
Output
BP6 S30
BP7 S31
*1: Circles indicate schmitt trigger inputs.
2: Can directly drive LED.
3: For BP0-7, V indicated below are selected as the input source.
LC1
However, the output level is changed depending on BP0-7 and the V
Function
4-bit input port (PORT0)
Pull-up resistors can be specified in 3-bit
units for the P01 to P03 pins by software.
With noise elimination function
4-bit input port (PORT1)
Internal pull-up resistors can be
specified in 4-bit units by software.
TI0
4-bit input/output port (PORT2)
—
Internal pull-up resistors can be
specified in 4-bit units by software.
Programmable 4-bit input/output port
MD0
(PORT3)
This port can be specified for input/output
in bit units.
Internal pull-up resistors can be
specified in 4-bit units by software.
N-ch open-drain 4-bit input/output port
(PORT4)
Data input/output pin for writing and
—
verifying of program memory (PROM)
(lower 4 bits)
N-ch open-drain 4-bit input/output port
(PORT5)
Data input/output pin for writing and
—
verifying of program memory (PROM)
(upper 4 bits)
Programmable 4-bit input/output port
(PORT6)
This port can be specified for input/output
in bit units.
Internal pull-up resistors can be specified
in 4-bit units by software.
4-bit input/output port (PORT7)
Internal pull-up resistors can be
specified in 4-bit units by software.
1-bit output port (BIT PORT)
Shared with a segment output pin.
8-Bit I/O When Reset
X Input
X Input
X Input
X
Input
High impedance
High impedance
Input
Input
X *3
external circuits.
LC1
PD75P308
Input/
Output
Circuit
TYPE *1
B
F -A
F -B
M -C
B -C
E-B
E-B
M-A
M-A
F -A
F -A
G-C
5