DM560P
V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
Preliminary
1
Version: DM560P-DS-P07
August 11, 2000
General Description
The DM560P integrated modem is a four chipset
design that provides a complete solution for state-
of-the-art, voice-band Plain Old Telephone Service
(POTS) communication. The modem provides for
Data (up to 56,000bps), Fax (up to 14,400bps),
Voice and Full Duplex Speaker-phone functions to
comply with various international standards.
The design of the DM560P is optimized for desktop
personal computer applications and it provides a low
cost, highly reliable, maximum integration, with the
minimum amount of support required. The DM560P
modem can operate over a dial-up network (PSTN)
or 2 wire leased lines.
The modem integrates auto dial and answer
capabilities, synchronous and asynchronous data
transmissions, serial and parallel interfaces, various
tone detection schemes and data test modes.
The DM560P modem reference design is pre-
approved for FCC part 68 and provides minimum
design cycle time, with minimum cost to insure the
maximum amount of success.
The simplified modem system, shown in figure
below, illustrates the basic interconnection between
the MCU, DSP, AFE and other basic components of
a modem. The individual elements of the DM560P
are:
•
DM6580 Analog Front End (AFE). 28-pin PLCC
package
•
DM6581 ITU-T V.90 Transmit Digital Signal
Processor (TX DSP). 100-pin QFP package
•
DM6582 ITU-T V.90 Receive Digital Signal
Processor (RX DSP). 100-pin QFP package
•
DM6583 Modem Controller (MCU) built in Plug &
Play (PnP). 100-pin QFP package
Block Diagram
LED
DM658
3
Micro
Controller
Unit
DM658
1
TX DSP
Ring
Detector
DM658
0
Analog
Front End
TxD
RxD
MSCLK
Address &
Data Bus
SCLK
DIT
DOT
TFS
DIR
DOR
RFS
TxBCLK
TxSCLK*2
RxBCLK
RxSCLK
20.16MHz
TxDCLK
RxDCLK
DAA
RxIN
TxA1
TxA2
Lin
e
Speaker
Driver
ISA Bus
DM658
2
RX DSP
V.24
Interface
V.24
Interface
PnP
SPKR
Microphone
Driver
29.4912
MHz
40.32MHz
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