HT9320 datasheet(11/29 Pages) HOLTEK

11 / 29 page

HT9320 Series

Rev. 1.10

October 1, 2002

Lock function (HT932L)

This function aims to detect lock dialing numbers to pre-

vent from an unauthorized long distance call. The dialing

output of this chip is disabled if the first input key after

on-off hook is the lock number when the lock function is

enabled.

International direct dialing lock (IDD lock) selection

table

RK51

RK61

RK71

Lock Function

Normal dialing without lock

function

Yes

To lock 0

Yes

To lock 0, 9

Yes

¾¾

IDD lock operation by the tele-

phone keyboard.

(See keyboard operation)

Note:

²¾² stands for ²don¢t care²

Hand-free function operation

· Hand-free function execution

When HFO is low, a rising edge triggers the HFI, en-

abling the Hand-free function (HFO becomes high).

· Reset Hand-free function

When HFO is high, the Hand-free function is enabled

and can be reset by:

¨ Off-hook

¨ Applying a rising edge to HFI

¨ Changing the HDO pin from low to high

· Hand-free function table

Hold-line function operation

· Hold-line function execution

When HDO is low, a falling edge triggers the HDI,en-

abling 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 a TP®T

duration in the pulse mode. On the other hand, the

*/T

key executes the

* function 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.

C u r r e n t S t a t e

I n p u t

N e x t S t a t e

H K S

H . O

H D O

H . I

H K S

A n

H . O

A n

H D O

A n

H D I

H :

L :

L o g i c H I G H

L o g i c L O W

X :

A n :

D o n ' t c a r e

U n c h a n g e d

R i s i n g e d g e

. a l l i n g e d g e

C u r r e n t S t a t e

I n p u t

N e x t S t a t e

H K S

H D O

H . O

H D I

H K S

A n

H D O

A n

H . O

A n

H . I

H :

L :

L o g i c H I G H

L o g i c L O W

X :

A n :

D o n ' t c a r e

U n c h a n g e d

R i s i n g e d g e

. a l l i n g e d g e

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