AS2525F datasheet(18/28 Pages) AMSCO

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Datasheet AS2525

austriamicrosystems

Revision 2.1

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Table 28: Pacifier tone selection

[PG] + [0] + (Password) + [#] + [9] + (digit) + [PG]

Digit

Pacifier Tone (Key-in Tone)

[0]

Disabled

[1]

Enabled

Table 29: Pacifier tones

Key Entry

Frequency

Duration

Acknowledge

1333 Hz

40 ms

Reject/Terminate

1333 Hz

4 x 40 ms

An invalid key entry will be indicated by a rejection tone of

4 times 40 ms.

By MF dialing the DTMF tones are provided to the earpiece

as comfort tone. The level of the comfort is selected

through the set-up programming.

Table 30: DTMF comfort tone level setting

[PG] + [0] + (Password) + [0] + (y + x) + [PG]

Key

(y + x)

Level (dBr)

Earpiece

Key

(y + x)

Level (dBr)

Loudspeaker

[9] + [0]

-36

[0] + [0]

-15

[9] + [1]

-30

[0] + [1]

-9

[9] + [2]

-24

[0] + [2]

-3

[9] + [3]

-18

[0] + [3]

Serial Bus

The AS2525 incorporates a microwire™ compatible serial

bus (DO, DI, and CLK) with two chip select outputs (CS1

and CS2). The serial bus is used to:

sending data to the LCD driver (AS2591) when a key is

pressed or a number is dialed out

reading and writing to the external EEPROM under

following conditions:

Table 31: EEPROM read/write timings

ACTION

DURATION

After off-hook (debounced)

50 ms

After on-hook (debounced)

200 ms

After first rising edge at FCI

10 ms

After PG is terminated

12…600 ms

After pressing [V+]/[V-]

20 ms

See also AS2591 data sheet for further information.

LCD Control

The AS2525 is designed to work together with the LCD

driver AS2591 (see also AS2591 data sheet).

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