LC871HC4A/92A

No.A1188-10/27

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

each bit

2

Nch-open drain

No

1

CMOS

Programmable

P10 to P17

P20 to P27

P30 to P34

each bit

2

Nch-open drain

Programmable

P70

-

No

Nch-open drain

Programmable

P71 to P73

-

No

CMOS

Programmable

PWM0, PWM1

-

No

CMOS

No

UHD+, UHD-

-

No

CMOS

No

XT1

-

No

Input only

No

XT2

-

No

32.768kHz crystal resonator output (N channel open

drain when in general-purpose output mode)

No

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

User Option List

Option Name

Option Type

Mask Version

*1

Flash Version

Option Selected in

Units of

Specified item

CMOS

P00 to P07

each bit

Nch-open drain

CMOS

P10 to P17

each bit

Nch-open drain

CMOS

P20 to P27

each bit

Nch-open drain

CMOS

Port output form

P30 to P34

each bit

Nch-open drain

00000h

Program start

address

-

×

*2

-

1FE00h

USE

USB Regulator

-

NONUSE

USE

USB Regulator

(at HOLD mode)

-

NONUSE

USE

USB Regulator

USB Regulator

(at HALT mode)

-

NONUSE

*1: Mask option selection - No change possible after the mask is completed.

*2: Program start address of the mask version is 00000h.