LC87F2W48A

No.A1869-10/26

On-chip Debugger Pin Connection Requirements

For the treatment of the on-chip debugger pins, refer to the separately available documents entitled “RD87 On-chip

Debugger Installation Manual”

Recommended Unused Pin Connections

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.

Note 1: The control of the presence or absence of the programmable pull-up resistors for port 0 and the switching

between low- and high-impedance pull-up connection is exercised in 1-bit units.

Recommended Unused Pin Connections

Port Name

Board

Software

P00 to P07

Open

Output low

P10 to P17

Open

Output low

P20 to P27

Open

Output low

P31 to P36

Open

Output low

P70 to P73

Open

Output low

PWM0, PWM1

Open

Output low

XT1

Pulled low with a 100k

Ω resistor or less

General-purpose input port

XT2

Open

Output low

CF1

Pulled low with a 100k

Ω resistor or less

General-purpose input port

CF2

Open

Output low

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

Programmable (Note 1)

1

CMOS

Programmable

P10 to P17

1 bit

2

Nch-open drain

Programmable

1

CMOS

Programmable

P20 to P27

1 bit

2

Nch-open drain

Programmable

1

CMOS

Programmable

P31 to P36

1 bit

2

Nch-open drain

Programmable

P70

-

No

Nch-open drain

Programmable

P71 to P73

-

No

CMOS

Programmable

PWM0, PWM1

-

No

CMOS

No

XT1

-

No

Input for 32.768kHz crystal oscillator

(Input only)

No

XT2

-

No

Output for 32.768kHz crystal oscillator

(Nch-open drain when in general-purpose

output mode)

No

CF1

-

No

Input for ceramic resonator oscillator

(Input only)

No

CF2

-

No

Output for ceramic resonator oscillator

(Nch-open drain when in general-purpose

output mode)

No