LC8740C8A/B2A/96A

No.A0122-11/25

Port Output Types

The table below lists the types of port outputs and the presence/absence of a pull-up resistor.

Data can be read into any input port even if it is in the output mode.

Port name

Option Selected

in Units of

Option Type

Output Type

Pull-up Resistor

1

CMOS

Programmable (Note 1)

P00 to P07

1 bit

2

Nch-open drain

No

1

CMOS

Programmable

P10 to P17

P20 to P27

P30 to P37

1 bit

2

Nch-open drain

Programmable

P70

-

No

Nch-open drain

Programmable

P71 to P73

-

No

CMOS

Programmable

P80 to P87

-

No

Nch-open drain

No

1

CMOS

Programmable

PC0 to PC4

1 bit

2

Nch-open drain

Programmable

Note 1: Programmable pull-up resistors for port 0 are controlled in 4-bit units (P00 to 03, P04 to 07).

*1 Connect the IC as shown below to minimize the noise input to the VDD1 pin.

Be sure to electrically short the VSS1 and VSS2 pins.

Power

supply

LSI

VDD1

VDD2

VSS2

VSS1