SC9302CT datasheet(17/39 Pages) SILAN

17 / 39 page

Silan

Semiconductors

SC9302 Series

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-01

13. KEY DEFINITION

Key Name

Function

0,1,2,3,4,5,6,7,8,9

numerical 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 T

P 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.

Pressing this key can save the preceding dialing telephone numbers. The saved

number is redialed if it is pressed again. SA will also redial the saved number if it is the

first key depressed at the off-hook state. During the dialing signal transmission, the SA

key is inhibited.

The flash key can be selected as a digit or a control key by the option resistors

K13&RK14. Pressing the flash key will force the

PO pin to be “low” for the TF duration

and is then followed by T

FP(sec). TF can also be selected by RK13, RK14.

Pause key. The execution of the pause key pauses the output for the T

P duration. TP

can be selected by R

K21.

Redial key. It executes the redialing as well as one-key redial function.

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.

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