µPD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
5. PERIPHERAL HARDWARE FUNCTIONS
5.1 Ports
The following three types of I/O port are provided:
• CMOS input ports (PORT0, 1, 11)
: 12
• CMOS input/output ports (PORT2, 3, 6)
: 12
• N-ch open-drain input/output ports (PORT4, 5) : 8
Total
32
Table 5-1. Functions of Port
Port (Symbol)
PORT0
PORT1
PORT3Note
PORT6
PORT2
PORT4Note
PORT5Note
PORT11
Function
4-bit input
4-bit I/O
4-bit I/O
(N-ch open-drain,
can withstand 10 V)
4-bit input
Operation/features
Can be read or tested regard-
less of the operation mode of
the dual function pin.
Can be specified for input/
output in bit units.
Can be specified for input/
output in 4-bit units.
Can be specified for input/
output in 4-bit units.
Ports 4 and 5 can be paired to
input/output data in 8-bit units.
4-bit port dedicated to input
Remarks
Shared with the SO/SB0, SI/SB1, SCK,
INT0-2, 4, and TI0 pins.
Port 6 is shared with pins KR0 to KR3 and
pins AN4 to AN7.
Port 2 is shared with PTO0, PCL, and BUZ
pins.
Whether or not the internal pull-up
resistor is provided can be specified for
each bit by mask option.
Port 11 is shared with pins AN0 to AN3.
Note Can directly drive LEDs.
18