µPD754302, 754304, 754302(A), 754304(A)
6. PERIPHERAL HARDWARE FUNCTIONS
6.1 Digital Input Ports
The following three types of I/O ports are provided.
• CMOS input (Ports 0, 1)
:8
• CMOS I/O (Ports 2, 3, 6 to 8)
: 18
• N-ch open-drain I/O (Port 5)
:4
Total
30
Table 6-1. Types and Features of Digital Ports
Port Name
PORT0
PORT1
PORT2
PORT3
PORT5
PORT6
PORT7
PORT8
Function
4-bit input
4-bit I/O
4-bit I/O
(N-ch open-
drain, 13 V)
4-bit I/O
2-bit I/O
Operation, Features
When serial interface function is used, multiplexed pin
has output function depending on operation mode.
Input port.
Can be set in input or output mode in 4-bit units.
Can be set in input or output mode in 1-bit units.
Can be set in input or output mode in 4-bit units. Pull-up
resistor can be connected in 1-bit units by mask option.
Remark
Multiplexed with INT4, SCK,
SO/SB0, and SI pins
Multiplexed with INT0
through INT2 and TI0/TI1 pins.
Multiplexed with PTO0, PTO1,
and PCL pins.
—
Can be set in input or
output mode in 1-bit units.
Can be set in input or
output mode in 4-bit units.
Ports 6 and 7 are used in
pairs and can input or
output data in 8-bit units.
Can be set in input or output mode in 2-bit units.
Multiplexed with KR0 through
KR3 pins.
Multiplexed with KR4 through
KR7 pins.
—
20