XE1212C Просмотр технического описания (PDF) - Xecom
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XE1212C Datasheet PDF : 16 Pages
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xecom
XE1212C
6/97
1200bps Modem Module with Parallel Host Interface
Description
The XE1212C is a complete 1200/300 bps
Modem in a compact, component form factor. It
contains all circuitry necessary for complete
modem functionality, including an FCC Part 68
Registered Data Access Arrangement (DAA) for
direct connection to the telephone line, and a
parallel 8250B UART interface for direct operation
with the IBM-PC, XT or AT system bus. It
operates from the industry standard 'AT'
command set. The XE1212C contains all signal
processing functions, including the modulators
and demodulators for both PSK and FSK
operation, and analog filters.
The XE1212C includes the capability for call
progress monitoring and DTMF tone generation
as well as the guard tones handling required for
CCITT V.22/V.21 communications. It operates in
the asynchronous mode and provides analog
loopback, digital loopback and remote digital
loopback functions for testing.
Features
• Small Size -2.28" x 1.0" x 0.5"
• FCC Part 68 Registered
• 212A/103 and CCITTV.22/V.21 Compatible
• Industry Standard "AT" Command Set
• Parallel Interface Emulates 8250B UART
• Call Progress Monitoring
• DTMF and Pulse Dialing
• Software Controlled Audio Output
• Modem Configuration storage in NVRAM
• +5 Volt Power Only
Typical Operating Power 200 mW
Automatic Sleep mode when idle reduces power
consumption to only 50 mW.
Block Diagram
PIN CONFIGURATION
N/C 1 •
GND 2
Vcc 3
RI\ 4
N/C 5
N/C 6
N/C 7
N/C 8
OH 9
N/C 10
N/C 11
AUDIO 12
INT 13
A0 14
A1 15
A2 16
CS\ 17
DOST\ 18
DIST\ 19
EHC 20
40 TIP
37 RING
28 D0
27 D1
26 D2
25 D3
24 D4
23 D5
22 D6
21 D7
XECOM
XE1212C
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