LC86E7148

No.6748-8/20

Pin name

I/O

Function description

Option

PROM mode

PORT A

(S0/PA0 –

S7/PA7)

I/O

• Segment output terminal for LCD display

• Can be used as a general input/output port

-

Address input

A0 to A7

PORT B

(S8/PB0 –

S13/PB5)

I/O

• Segment output terminal for LCD display

• Can be used as a general input/output port

-

Address input

A8 to A13

PORT C

(S16/PC0 –

S23/PC7)

I/O

• Segment output terminal for LCD display

• Can be used as a general input/output port

-

PROM control

signal input

•TA(*5)

Address input

•A14,A15

PORT D

(S24/PD0 –

S31/PD7)

I/O

• Segment output terminal for LCD display

• Can be used as a general input/output port

-

PORT L

(COM0/PL0 –

COM3/PL3)

I/O

• Common output terminal for LCD display

• Can be used as a general input port

-

V1/PL4 –

V3/PL6

I

• Bias power terminal for LCD drive

• Can be used as a general input port

-

RES

I

Reset pin

-

I

• Input pin for 32.768kHz crystal oscillation

In case of non use, connect to VDD.

• Other function

-

XT2/P75

O

( I )

• Output pin for 32.768kHz crystal oscillation

In case of non use, should be left unconnected

• Other function

A general input port P75

-

CF1

I

Input pin for ceramic resonator oscillation

-

CF2

O

Output pin for ceramic resonator oscillation

-

* All of port options can be specified in bit unit except the pull-up resistor of port 0.

[Notes] • The VDD1, VDD2 and VDD3 terminals must be shorted electrically each other.

• The VSS1, VSS2 and VSS3 terminals must be shorted electrically each other.

*1 Connect like the following figure to reduce noise into a VDD terminals.

*2 Memory select input for data security

*3 Output enable input

*4 Chip enable input

*5 TA ! PROM control signal input

Power

Supply

VDD1

VDD2

LSI

VDD3

VSS1

VSaS2 VSS3