AS2525B austriamicrosystems, AS2525B Datasheet - Page 15

• 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
Reset to Factory Settings
It is possible to reset all settings to the default factory
settings with following procedure:
Dial Mode Selection
The default signaling mode (LD or MF) is selectable
through following procedure:
When default LD mode is selected, a temporary change to
MF can be invoked by pressing the [ ] key. Temporary MF
select with tone on first key pressure can be selected as
option (see also Table 3: Parameter settings). The circuit
will revert to LD by pressing the [FL] key or by next on-
hook.
Re-Dialing (Last Number Redial)
Re-dialing is a facility that allows re-signaling of the last
dialed number without keying in all the digits again.
Numbers dialed out from any memory will also be stored in
the LNR memory. The re-dialing works in following manner:
-
-
-
-
Pauses can also be inserted by pressing the [R/P] key in
program mode.
Revision 2.1
Any digit (including Flash, Pause, and MF select) being
dialed is storable in the LNR memory up to a total of 31
digits.
If more than 31 digits are entered, re-dialing will be
inhibited.
Pressing the [R/P] key as first entry after off-hook
(LNR cursor at first digit) will invoke dialing the content
of the LNR memory.
If the [R/P] key is pressed after entering one or more
digits, the key will function as a pause key and each
pressure will insert a pause.
4. Press [PG] (= store and exit) or go on-hook to
1. Press [PG] to enter program mode
2. Press [1] + (PIN) + [#] + [8]
3. Press [1] for reset
4. Press [PG] (= store and exit) or go on-hook to
1. Press [PG] to enter program mode
2. Press [3] to enter dial select mode
3. Press [0] for LD and [1] for MF
4. Press [PG] (= store and exit) or go on-hook to
abort
abort
abort
Flash Function
A flash, [FL] key, activation will invoke a timed loop break.
The flash duration can be programmed through set-up (see
Figure 2: Keys for HEX-code entry and Table 4: Timing
selection by HEX code):
Table 22: Flash duration setting
One of two pre-programmed can be selected as follows:
A flash entered will be stored in the LNR memory together
with entered digits. After a recall a 270 ms pause will
automatically be executed.
Pauses
Pauses can be inserted if the [R/P] key is pressed after
entering one or more digits. Also during programming,
pauses can be inserted by pressing the [R/P] key. Default
pause duration is 1 second (P1) and an alternative pause
of 3 second (P2) can be selected. These pauses can be
changed through the set-up programming (see Table 3:
Parameter settings)
Memory Keys
The keys [M1] to [M8] are direct memory access keys,
[SH] key is used to access second level of direct
memories, and the [MR] key is used for key-code dialing.
Up to 26 numbers can be stored in the on-chip RAM. Each
number can contain up to 21 digits (including pauses).
During programming multiple pauses can be inserted by
pressing the [RD] key.
Example (45678P123 is stored in M1, where P is a pause
and 123 the extension number):
Memory dialing is cascadable up to a the maximum of 31
digits/data.
[PG] + [0] + (Password) + [ ] + (digit) + (HEX) + [PG]
Digit
[4]
[5]
1. Press [PG] to enter program mode
2. Press [2] to enter flash select mode
3. Press [0] for duration 1 and [1] for duration 2
4. Press [PG] (= store and exit) or go on-hook to
1. Off-hook, wait for dial tone
2. Press [M1]
abort
Timing
HEX code
HEX code
-
-
-
45678 is dialed out
Dialing halts (pauses)
Dialing is resumed, 123 is dialed out.
Flash Duration
Flash 1
Flash 2
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