AS2525 datasheet(5/26 Pages) AMSCO

Part #	AS2525

Description	Single-Chip Handsfree Phone CMOS Integrated Circuit

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Manufacturer	AMSCO [ams AG]

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Preliminary

AS2525

Rev. 1.3

Page 5

May 1999

Key Definitions and Procedures

Table 1: Key definitions

Key

Condition

Function

Remark

[0] - [9],

[#], [

∗]

Off-hook

Digits

Function depending on mode

[

∗]

LD mode

Temporary MF select

Providing mixed mode dialling (default LD

selected)

[PG]

Speech mode

Enter programme state

To enter the programme state

Programme mode

Exit programme state

To terminate/exit programme state

[MT]

Speech mode

Enter mute state

To enter mute state

Mute state

Exit mute state

To terminate/exit mute state

Programme mode

Enter blank

To enter blank digit during programming

[R/P]

Redial/Pause

Allows re-signalling of the last dialled number and

insertion of pauses

Programme state

Pause

Each key pressure inserts a pause

[FL]

Flash function

Invokes a timed loop break

[V+]

Speech mode

Volume control

To increase the receive gain

[V-]

Speech mode

Volume control

To increase or decrease the receive gain

[MR]

Memory redial key

To access memory by key codes

[M1] - [M8]

Memory dial

Access keys to memories 1 to 8 and 9 to 16

[SH]

Second function (shift)

To access second function of keys

Table 2: Digits

Digit Key

DTMF Mode

(f

LOW + fHIGH)

Pulse Mode

Programming Mode

([PG] + Digit)

Memory Location

([MR] + Digit)

[0]

941 + 1336 Hz

10 pulses

Memory 17

[1]

697 + 1209 Hz

1 pulse

To enter PIN protected programming

Memory 18

[2]

697 + 1336 Hz

2 pulses

Select flash duration

Memory 19

[3]

697 + 1477 Hz

3 pulses

Select dialling mode

Memory 20

[4]

770 + 1209 Hz

4 pulses

Select pause duration

Memory 21

[5]

770 + 1336 Hz

5 pulses

Key lock toggle

Memory 22

[6]

770 + 1477 Hz

6 pulses

Ringer volume

Memory 23

[7]

852 + 1209 Hz

7 pulses

Ringer melody

Memory 24

[8]

852 + 1336 Hz

8 pulses

LCD contrast

Memory 25

[9]

852 + 1477 Hz

9 pulses

Ringer on/off

Memory 26

[

∗]

941 + 1209 Hz

Temporary MF select

-

[#]

941 + 1477 Hz

-

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