HT9320 datasheet(14/30 Pages) HOLTEK

14 / 30 page

HT9320

July 21, 1999

· Hand-free function table

Hold-line function operation

· Hold-line function execution

When HDO is low, a falling edge triggers the

HDI, enabling the Hold-line function (HDO

becomes high). The XMUTE remains low

when HDO is high.

· Reset Hold-line function

When HDO is high, the Hold-line function is

enabled and can be reset by:

¨ Off-hook

¨ Applying a falling edge to HDI

¨ Changing the HFO pin from low to high

· Hold-line function table

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 wait

aTP®T duration in the pulse mode. On the

other hand, the */T key executes the * func-

tion in the tone mode.

· * (HT9320H)

The * key executes the * tone output function

in the tone mode. No response in the pulse

mode.

· P®T

The key executes the P®T function in the

pulse mode. No response in the tone mode.

· #

This is a dialing signal key for the tone mode

only, no response in the pulse mode.

Cu r r e n t S t a t e

In p u t

N e x t S t a t e

HK S

HF O

HD O

HF I

HK S

HF O

HD O

HD I

Lo g i c H I G H

Lo g i c L O W

An :

D o n ' t ca re

Unc h a ng e d

Ri s i n g e d g e

F a llin g e d g e

Cu r r e n t S t a t e

In p u t

N e x t S t a t e

HK S

HD O

HF O

HD I

HK S

HD O

HF O

HF I

Lo g i c H I G H

Lo g i c L O W

An :

D o n ' t ca re

Unc h a ng e d

Ri s i n g e d g e

F a llin g e d g e

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