Peripheral Hardware Functions; Port - NEC mPD75512 Datasheet

6.

PERIPHERAL HARDWARE FUNCTIONS

6.1

PORT

I/O ports are classified into following kinds:
• CMOS input (PORTS 0, 1, 8, 15)
• CMOS input/output (PORTS 2, 3, 6, 7, 9, 10, 11)
• N-ch open-drain input/output (PORTS 4, 5, 12, 13, 14)
Total
Port
Function
(Pin Name)
PORT0
4-bit input
PORT1
PORT2
4-bit I/O
PORT3*
4-bit I/O
PORT4*
(N-ch
open-drain,
can sustain
PORT5*
with 10V)
PORT6
4-bit I/O
PORT7
4-bit
PORT8
input
PORT9 4-bit I/O
PORT10
4-bit I/O
PORT11
PORT12 4-bit I/O
(N-ch
PORT13 open-drain,
can sustain
PORT14 with 10V)
PORT15 4-bit
Input
*: Can directly drive LED
Table 6-1 Port Functions
Operation/Feature
Can be read or tested regardless of the operation
mode of the shared pin.
Can be specified for I/O in 4-bit units
Can be specified for I/O in 1/4-bit units.
Can be specifiedfor
I/O in 4-bit units
Can be specified
for I/O in 1/4-bit units
Can be specified
I/O in 4-bit
units
Can be read or tested regardless of the operation
mode of the shared pin.
Can be specified for I/O in 4-bit units.
Can be specified for I/O in 4-bit units.
Can be specified for I/O in 4-bit units.
Can be read or tested regardless of the operation
mode of the shared pins
: 16
: 28
: 20
: 64
Also serves as the INT4, SCK0 ,
SO0/SB0, and SI0/SB1 pins
Also serves as INT0 to 2, and
TIO pins
Also serves as PTO0, PCL and
BUZ pins.
Whether or not the internal
Ports 4 and 5 can
pull-up resistor is provided
be paired to I/O
can be specified for each bit
data in 8-bit units
by mask option
Ports 6 and 7 can Also serves as KR0-3.
be paired to I/O
data in 8-bit units
Also serves as KR4-7.
Also serves as PPO, SCK1 ,
SO1, and SI1 pins.
Whether or not the internal
pull-up resistor is provided
can be specified for each bit
by mask option.
Whether or not the internal
pull-up resistor is provided
can be specified for each
bit by mask option.
Also serves as AN4-7 pins.
µ PD75512
Remarks
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