Preliminary

AS2525

Rev. 1.3

Page 4

May 1999

Pin #

Symbol

Type

Description

42

DI

DI

Data input of 3-wire bus.

If signal is not activated, a pull down resistor (100 k

Ω) is inserted.

43

DO

DO

Data output of 3-wire bus.

A 100 k

Ω resistor connected from this pin to VSS enables key locking.

If signal is not activated, a pull down resistor (100 k

Ω) is inserted.

44

CS1

DO

Chip select signal for external EEPROM.

If signal is not activated, a pull down resistor (100 k

Ω) is inserted.

DI:

Digital Input

AI:

Analogue Input

DO:

Digital Output

AO:

Analogue Output

DI/O:

Digital Input/Output

AI/O:

Analogue Input/output

Pin Configuration

YYWWAAA

AS2525

Austria

CS2 1

DPn 2

HF 3

HS 4

FT1 5

FT2 6

M4

7

M2

8

M3

9

M1 10

STB 11

33 OSC

32 LED

31 FCI

30 Head

29 VSSA

28 LS2

27 LS1

26 VPP

25 CM

24 CBN

23 AGND

Figure 3: Pin configuration

Keyboard Layout

C4

C3

C2

C1

4

2

0

7

5

3

∗∗

8

6

9

MR

R/P

FL

M5

1

M6

PG

V+

M7

V-

M8

#

M1

M2

M3

M4

SH

R1

R2

R3

MT

Figure 4: Keyboard Layout

Maximum R

Minimum R

See “Table 1: Key definitions” for description of key

functions.

Basic Definitions

Password is set to 0123 and is used to access basic parameter settings (see Table 3: Parameter settings). The

set-up programming is normally done in the factory during manufacturing of the telephone sets. The factory

settings can be loaded into the EEPROM (see Figure 6: Memory allocation for external EEPROM).

PIN code is default set to 1111 and is used by the user to protect certain user settings (see Table 5: User

programming with PIN code). The PIN code can be changed by the user.

Default settings are shown in bold.

Program procedures are entered with the [PG] key. Pressing any invalid key or going on-hook during programming

will abort the program mode and no changes will be stored. Ending a program procedure by pressing the [PG] key

will store the changes and exit the program mode.