HT9302D Ver la hoja de datos (PDF) - Holtek Semiconductor

Número de pieza

componentes Descripción

Fabricante

HT9302D

1-memory/2-memory tone/pulse dialer

Holtek Semiconductor 

LOCK function

The function aims to detect locked dialing number to

prevent a long distance call. The dialing output of the

chip is disabled if the first input key after on-off-hook is

the locked number when the lock function is enabled.

The lock function selection is listed below.

· HT9302x version

LOCK Pin

OPEN

Function

Normal dialing (no lock)

VDD

VSS

²0, 9² is inhibited

²0² is inhibited

Key definition

· 0,1,2,3,4,5,6,7,8,9 keys

These are dialing number input keys for both the pulse

mode and the tone mode operations.

· */T

This key executes the P®T function and waits a tP®T

duration in the pulse mode. On the other hand, the */T

key executes the * function in the tone mode.

·#

This is a dialing signal key for the tone mode only, no

response in the pulse mode.

· SA

Pressing this key can save the preceding dialing tele-

phone numbers. The saved number is redialed if it is

pressed again. SA will also redial the saved number if

it is the first key pressed at the off-hook state. During

the dialing signal transmission, the SA key is inhibited.

HT9302 Series

·F

The flash key can be selected as a digit or a control key

by the option resistors RK13 & RK14. Pressing the flash

key will force the PO pin to be ²low² for the tF duration

and is then followed by tFP (sec). tF can also be selected

by RK13, RK14.

·P

Pause key. The execution of the pause key pauses

the output for the tP duration. tP can be selected by

RK21.

·R

Redial key. Executes redialing as well as one-key re-

dial function.

· ST

This key can store lock number with personal code in

IDD lock operation.

· R/P

Redial and pause function key. If it is pressed as the

first key after off-hook, this key executes the redial

function. Otherwise, it works as the pause key.

Rev. 1.30

9

May 13, 2009

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