AS2525B austriamicrosystems, AS2525B Datasheet - Page 16

• Manufacturer Part Number: AS2525B
• Description: IC, SINGLE CHIP HANDS FREE PHONE, TQFP44
• Manufacturer: austriamicrosystems

Specifications of AS2525B

• Audio Control Type: Volume
• Output Power: 500mW
• Control Interface: Serial
• Control / Process Application: Volume Control For Earpiece & Loudspeaker
• Supply Voltage Range: 3V To 5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Datasheet AS2525
Memory Storing Procedure
Up to 28 numbers, each with maximum 24 digits, can be
stored into the external EEPROM. The store procedure is
as follows:
[Mute]
[R/P]
Tone Generator
The tone generator incorporates the DTMF tones, 3
frequencies for the tone ringer and pacifier tones.
DTMF
The DTMF generator provides 7 frequencies.
Table 23: DTMF frequencies
The MF output level can be set through set-up program-
ming. The range is from -18 dBm to -6 dBm in 1 dB steps.
Table 24: DTMF level settings
3
Revision 2.1
Digit includes 0 – 9,
1. Press [PG] to enter program mode
2. Enter location (MR + digit
3. Enter number
4. Press [PG] to store and exit or go on-hook to abort
5. Go to 1 for storing further numbers
Key
(x)
[0]
[1]
[2]
[3]
[4]
[5]
[6]
SH + M1 to 8)
[PG] + [0] + (Password) + [0] + [6] + (x) + [PG]
starts and stops security storing
(LCD-Symbols [ and ])
inserts a pause (LCD-Symbol P)
1 - 4 - 7 -
2 - 5 - 8 - 0
3 - 6 - 9 - #
Columns
1 - 2 - 3
4 - 5 - 6
7 - 8 - 9
Rows
Digit
- 0 - #
Level (dBm)
Low Group
-18
-17
-16
-15
-14
-13
-12
and #
3
; M1 to 8; or
[M1]
[M2]
[M3]
Key
(x)
[7]
[8]
[9]
High Group
Frequency
Low Group
1209 Hz
1336 Hz
1477 Hz
697 Hz
770 Hz
852 Hz
941 Hz
Level (dBm)
Low Group
-11
-10
-9
-8
-7
-6
The pre-emphasis is 2.6 dB. The DTMF tones are
according to CEPT recommendations.
Tone Ringer (Melody/Volume)
The tone ringer incorporates two basic selection, namely 2-
tone or 3-tone melodies. The default set-up selection is the
3-tone ringer.
Table 25: Basic ringer melody selection
The user can chose the following melodies as shown in
below table.
Table 26: 3-tone melody programming
The chosen melody will be heard in the loudspeaker during
programming. Pressing the [PG] key will end the procedure
and the last selected melody will be stored.
When 2-tone melody is selected through the set-up
procedure, it is possible to chose the following melodies:
Table 27: 2-tone melody programming
Repetition rate means that a sequence of 6 frequencies is
repeated 1, 2, 4, 5, 6 or 10 times within 1 second.
Pacifier Tone
Any key entry is acknowledged by a pacifier tone (key-in
tone) of 1333 Hz. The pacifier tone can be
enabled/disabled through set-up programming.
[PG] + [7] +
[PG] + [7] +
Procedure
Procedure
Digit
[PG] + [0] + (Password) + [#] + [8] + (digit) + [PG]
[0]
[1]
2-tone
3-tone
Ringer Melody
Press [PG] to store and terminate
Press [PG] to store and terminate
Digit
Digit
[3)
[3)
[0]
[1]
[2]
[4]
[0]
[1]
[2]
[4]
F1 F2 F3 F1 F2 F3
F1 F2 F3 F1 F2 F3
F1 F2 F3 F1 F2 F3
F1 F2 F3 F1 F2 F3
F1 F2 F3 F1 F2 F3
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
F1 F3 F1 F3 F1 F3
F1 F3 F1 F3 F1 F3
F2 F3 F2 F3 F2 F3
Sequence
Sequence
Page 16 of 27
Rate
Rate
10
1
2
4
6
2
5
2
5
2