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ST75C540FP-A Datasheet

  • ST75C540FP-A

  • SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHON...

  • 596.26KB

  • 84頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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ST75C530
ST75C540
SUPER INTEGRATED DEVICES WITH DSP, AFE & MEMORIES
FOR TELEPHONY, MODEM, FAX OVER INTERNET & POTS LINES
SUMMARIZED FEATURES
(for detailed features, see page 4)
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SINGLE CHIP FAX Up to 14.4Kbps (V.17)
FULL DUPLEX DATA MODEM UP TO
14.4Kbps (V.32Bis)
DIGITAL ANSWERING MACHINE :
- 4.8Kbps VOCODER
- VARIABLEPLAYBACK SPEED (+50% to -50%)
- ADPCM 32, 34, 16Kbps VOCODER
FULL-DUPLEX DIGITAL SPEAKERPHONE
WITH ECHO CANCELLATION
PROGRAMMABLE RING DETECTION
16 PROGRAMMABLE TONE DETECTORS
FOR CLID AND SCWID
DTMF DETECTION
VERSATILE HOST INTERFACES
16 GENERAL PURPOSE I/O PORTS
2 RELAY DRIVE OUTPUTS
SINGLE 5V POWER SUPPLY
TYPICAL ACTIVE POWER CONSUMPTION :
650mW (ST75C530), 750 mW (ST75C540)
LOW POWER MODE < 30mW
80-PIN TQFP PACKAGE (14mm x 14mm)
TQFP80
(14 x 14 x 1.4mm)
(Full Thin Plastic Quad Flat Pack)
ORDER CODE :
ST75C530FP-A
ST75C540FP-A
DESCRIPTION
ST75C530 and ST75C540 are two super-inte-
grated devices including DSP, Modem and Audio
Analog Front Ends and memories for Telephony,
Modem and FAX applications.
These devices can be used for classical applica-
tions over POTS lines or over Internet.
The super integration technology allows a signifi-
cant cost reduction on bill of materials for equip-
ment like High-End phones, INTERNET phones,
phone-Fax, INTERNET FAX, ...
The devices are used with a host processor
through a Dual Port RAM allowing the use of any
kind of microcontroller (RISC, CISC, General Pur-
pose 8-bit
碌
C, ...).
February 1999
The embedded software includes :
- handset with listening group capability,
- full duplex handsfree,
- voice coder/decoderat 4.8Kbpsfor staticanswer-
ing machine applications and ADPCM 16Kbps,
24Kbps and 32Kbps for high quality message
recording,
- Tone and DTMF generators,
- Tone and DTMF detectors,
- FAX up to 14.4Kbps,
- Data-Modem up to 14.4Kbps (ST75C540 only).
The DSP sofware is extensively user configurable
allowing specific functions to be supported like
Caller Identifier (CLID) and Second Call Waiting
Identifier (SCWID).
The DSP software includes a transparent mode
allowing the host controller to access directly the
modem Analog Front End and the Audio AFE
through the dual Port RAM. This is very useful for
hostprocessing modem solutions (or soft modem)
where the modulation and the demodulation (V.34,
V.90) are done by the application main processor.
In transparent mode, the embedded DSP can be
used simultaneously with the same samples.
The transparentmode for audio AFE is provided to
play audio files or to record voice and/or audio.
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