PSB4860 Просмотр технического описания (PDF) - Siemens AG
Номер в каталоге
Компоненты Описание
Список матч
PSB4860 Datasheet PDF : 250 Pages
| |||
PSB 4860
Overview
1
Overview
GGeenneerraall
Combined with an analog front end the PSB 4860 provides a solution for embedded or
stand alone answering machine applications. Together with a standard microcontroller
for analog telephones these two chips form the core of a featurephone with full duplex
speakerphone and answering machine capabilities.
The chip features recording by DigiTape™, a family of high performance algorithms.
Messages recorded with DigiTape™ can be played back with variable speed without
pitch alteration. Messages recorded with a higher bitrate can be converted into
messages with a lower bitrate arbitrarily. Current members of DigiTape (TM) span the
range from 3.3 kbit/s to 10.3 kbit/s.
Furthermore the PSB 4860, V2.1 has a full duplex speakerphone, a caller ID decoder,
DTMF recognition and generation and call progress tone detection. The frequency
response of cheap microphones or loudspeakers can be corrected by a programmable
equalizer.
Messages and user data can be stored in ARAM/DRAM or flash memory which can be
directly connected to the PSB 4860. The PSB 4860 also supports a voice prompt
EPROM for fixed announcements.
The PSB 4860 provides an IOM®-2 compatible interface with two channels for speech
data.
Alternatively to the IOM®-2 compatible interface the PSB 4860 supports a simple serial
data interface (SSDI) with separate strobe signals for each direction (linear PCM data,
one channel).
A separate interface is used for a glueless connection to the PSB 4851.
The chip is programmed by a simple four wire serial control interface and can inform the
microcontroller of new events by an interrupt signal. For data retention the PSB 4860
supports a power down mode where only the real time clock and the memory refresh (in
case of ARAM/DRAM) are operational.
The PSB 4860 supports interface pins to +5 V levels.
Semiconductor Group
11
10.97
Share Link: 