AS2525 Datasheet, PDF (5/26 Pages) ams AG – Single-Chip Handsfree Phone CMOS Integrated Circuit

Preliminary
AS2525
Key Definitions and Procedures
Table 1: Key definitions
Key
[0] - [9],
[#], [∗]
[∗]
Condition
Off-hook
LD mode
[PG]
[MT]
[R/P]
Speech mode
Programme mode
Speech mode
Mute state
Programme mode
[FL]
[V+]
[V-]
[MR]
[M1] - [M8]
[SH]
Programme state
Speech mode
Speech mode
Function
Digits
Remark
Function depending on mode
Temporary MF select
Enter programme state
Exit programme state
Enter mute state
Exit mute state
Enter blank
Redial/Pause
Pause
Flash function
Volume control
Volume control
Memory redial key
Memory dial
Second function (shift)
Providing mixed mode dialling (default LD
selected)
To enter the programme state
To terminate/exit programme state
To enter mute state
To terminate/exit mute state
To enter blank digit during programming
Allows re-signalling of the last dialled number and
insertion of pauses
Each key pressure inserts a pause
Invokes a timed loop break
To increase the receive gain
To increase or decrease the receive gain
To access memory by key codes
Access keys to memories 1 to 8 and 9 to 16
To access second function of keys
Table 2: Digits
Digit Key
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[∗]
[#]
DTMF Mode
(f_LOW + f ) _HIGH
941 + 1336 Hz
697 + 1209 Hz
697 + 1336 Hz
697 + 1477 Hz
770 + 1209 Hz
770 + 1336 Hz
770 + 1477 Hz
852 + 1209 Hz
852 + 1336 Hz
852 + 1477 Hz
941 + 1209 Hz
941 + 1477 Hz
Pulse Mode
10 pulses
1 pulse
2 pulses
3 pulses
4 pulses
5 pulses
6 pulses
7 pulses
8 pulses
9 pulses
Temporary MF select
-
Programming Mode
([PG] + Digit)
To enter PIN protected programming
Select flash duration
Select dialling mode
Select pause duration
Key lock toggle
Ringer volume
Ringer melody
LCD contrast
Ringer on/off
Memory Location
([MR] + Digit)
Memory 17
Memory 18
Memory 19
Memory 20
Memory 21
Memory 22
Memory 23
Memory 24
Memory 25
Memory 26
-
-
Rev. 1.3
Page 5
May 1999