D75108CW NEC, D75108CW Datasheet - Page 20

• Manufacturer Part Number: D75108CW
• Description: Search -----> UPD75108CW
• Manufacturer: NEC

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20
5.
5.1
*: Can directly drive LED.
PORT0
PORT1
PORT3
PORT6
PORT2
PORT4
PORT5
PORT7
PORT8
PORT9
PORT12
PORT13
PORT14
(Symbol)
I/O ports are classified into the following 3 kinds:
Total
Port
PERIPHERAL HARDWARE FUNCTIONS
CMOS input (PORT0, 1)
CMOS input/output (PORT2, 3, 4, 5, 6, 7, 8, 9) : 32
N-ch open-drain input/output (PORT12, 13, 14)
PORTS
4-bit I/O*
(N-ch open- drain.
12V)
4-bit input
4-bit I/O*
Function
Can always be read or tested regardless of opera-
tion mode of shared pin
Can be set in input or output mode bitwise
Can be set in input or output mode in units of 4 bits.
Ports 4 and 5, 6 and 7, 8 and 9 can be used in pairs
to input or output 8-bit data
Can be set in input or output mode in units of 4 bits.
Ports 12 and 13 can be used in pairs to input or
output 8-bit data
Table 5-1 Port Function
Operation and Features
:
: 12
: 52
8
PD75104, 75106, 75108
Shared with SI, SO, SCK, and
INT0 to 4 pins
Port 2 pins are shared with
PTO0, PTO1, and PCL pins
Each bit can be connected to
pull-up resistor by mask option
Remarks
—