AS2533T austriamicrosystems AG, AS2533T Datasheet - Page 12

• Manufacturer Part Number: AS2533T
• Description: Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping
• Manufacturer: austriamicrosystems AG

Data Sheet
Operating Procedures
Procedure Principles
The procedures for utilizing the features of the AS253x are optimized out of consideration for the human factor in
order to:
- meet the user´s expectations
- be easy to learn and relearn
- not invoke any automatic functions which the user doesn´t expect
- protect the user from committing critial errors, e.g. dialling wrong numbers, deleting stored numbers, etc.
- be consistent, simple and usable.
The following pages describe the operating procedures for the provided features. Pressing an unvalid key or key
combination during programming will cause the device to abort the programme state. Pressing any key
combination or sequence which is not described or defined may cause the device to enter a state or mode that
does not comply with the expectation of the user. In such cases, any undesired state can be terminated at any time
by going on-hook / off-hook which will generate a functional reset.
Symbols
Rev. 7
TEXT
STATES
Privacy mute
Invalid entry
State according
to text
Idle (on-hook,
no ringing)
Speech mode
Programming
False programme
entry
TEXT
KEY
ENTRIES
12
Going on-hook
Pressing a key
Entering a
number
Entry according
to text
Going off-hook
X
TEXT
or
sec
PROCESSING
Time out (x sec.)
Dialling
(LD or MF)
Storing (writing
into RAM)
Processing
according to text
reading from
memory
AS2533...6
July 1998