HT95C30P datasheet(5/50 Pages) HOLTEK

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Pin Name

I/O

Description

LCD Driver

SEG0~SEG23

LCD panel segment outputs.

SEG24~SEG35

LCD panel segment outputs. (HT95C300/30P only)

SEG36~SEG47

(PD0~PD7,

PE0~PE3)

I/O

LCD panel segment outputs. (HT95C300/30P only)

SEG36~SEG39, SEG40~SEG43 and SEG44~SEG47 can be nibble optioned to

PD0~PD3, PD4~PD7 and PE0~PE3 by software.

COM0~COM7

(PD0~PD7)

I/O

LCD panel common outputs.

HT95C300/30P: Can be optioned to COM0~COM7 or unused.

HT95C200/20P: Can be optioned to COM0~COM7 or PD0~PD7.

All these are optioned by software.

COM8~COM15

LCD panel common outputs.

VLCD

LCD driver power source.

Normal I/O

PA0~PA7

I/O

Bidirectional 8-bit input/output ports.

Schmitt trigger input or CMOS output.

See mask option table for pull-high and wake-up function

PB0~PB7

I/O

Bidirectional 8-bit input/output ports.

Schmitt trigger input or CMOS output.

See mask option table for pull-high function

PD0~PD7

I/O

Bidirectional 8-bit input/output ports.

Schmitt trigger input and CMOS output.

HT95C300/30P: PD0~PD3 and PD4~PD7 can be per nibble optioned to

SEG36~SEG39 and SEG40~SEG43 by software.

HT95C200/20P: PD0~PD7 can be optioned to COM0~COM7 by software.

See mask option table for pull-high function

PE0~PE3

I/O

Bidirectional 4-bit input/output ports.

Schmitt trigger input and CMOS output.

HT95C300/30P: PE0~PE3 can be per nibble optioned to SEG44~SEG47 by software.

HT95C200/20P: Fixed for PE0~PE3.

See mask option table for pull-high function

Dialer I/O (See the

²Dialer I/O function²)

HFI

Schmitt trigger input structure. An external RC network is recommended for input

debouncing.

This pin is pulled low with internal resistance of 200k

W typ.

HFO

CMOS output structure.

HDI

Schmitt trigger input structure. An external RC network is recommended for input

debouncing.

This pin is pulled high with internal resistance of 200k

W typ.

HDO

CMOS output structure.

HKS

This pin detects the status of the hook-switch and its combination with HFI/HDI can con-

trol the PO pin output to make or break the line.

CMOS output structure controlled by HKS and HFI/HDI pins and which determines

whether the dialer connects or disconnects the telephone line.

DNPO

NMOS output structure.

XMUTE

NMOS output structure. Usually, XMUTE is used to mute the speech circuit when trans-

mitting the dialer signal.

HT95C200/20P/300/30P

Rev. 0.10

October 1, 2002

Preliminary

HT95C30P Datasheet(PDF) 5 Page - Holtek Semiconductor Inc

HT95C30P Datasheet(HTML) 5 Page - Holtek Semiconductor Inc

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