LC87F06J2A

No.A0432-11/32

Continued from preceding page.

Pin Name

I/O

Function description

Option

SIO2 Port

SI2P0 to SI2P3

I/O

• 4-bit I/O port

• I/O specifiable in 1-bit units

• Other functions:

SI2P0: SIO2 data output

SI2P1: SIO2 data input, bus input/output

SI2P2: SIO2 clock input/output

SI2P3: SIO2 clock output

No

PWM0

O

• PWM0 output port

• General-purpose I/O available

No

PWM1

O

• PWM1 output port

• General-purpose I/O available

No

RES

I

Reset pin

No

XT1

I

• Input terminal for 32.768kHz X'tal oscillation

• Other functions:

General-purpose input port

Must be connected to VDD1 if not to be used.

No

XT2

I/O

• Output terminal for 32.768kHz X'tal oscillation

• Other functions:

General-purpose I/O port

Must be set for oscillation and kept open if not to be used.

No

CF1

I

Ceramic resonator input pin

No

CF2

O

Ceramic resonator output pin

No

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

Options selected

in units of

Option type

Output type

Pull-up resistor

1

CMOS

Programmable (Note 1)

P00 to P07

1 bit

2

N-channel open drain

No

1

CMOS

Programmable

P10 to P17

P20 to P27

P30 to P36

PA0 to PA5

PC0 to PC7

1 bit

2

N-channel open drain

Programmable

1

CMOS

No

PB0 to PB2

PB4, PB6

1 bit

2

N-channel open drain

No

PE0 to PE7

PF0 to PF7

-

No

CMOS

Programmable

P70

-

No

N-channel open drain

Programmable

P71 to P73

-

No

CMOS

Programmable

P80 to P87

-

No

N-channel open drain

No

SI2P0, SI2P2

SI2P3

PWM0, PWM1

-

No

CMOS

No

SI2P1

-

No

CMOS (when selected as ordinary port)

N-channel open drain

(when SIO2 data is selected)

No

XT1

-

No

Input only

No

XT2

-

No

Output for 32.768kHz crystal oscillator

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 P03, P04 to P07).