CMX218S1 MX-COM, Inc., CMX218S1 Datasheet - Page 23

• Manufacturer Part Number: CMX218S1
• Description: ISDN data and telephony protocol engine
• Manufacturer: MX-COM, Inc.

ISDN Data and Telephony Protocol Engine (no X.25)
5.
5.1
The CMX218 is intended for use as part of an ISDN chipset. The MX-COM recommended hardware
implementation contains the following elements (refer to Figure 3):
S/T
5.2
The firmware and finite state machine embedded in the CMX218 have been used in products that have
gained ETSI CTR3 approval.
MX-COM, Inc
4800 Bethania Station Road, Winston-Salem, NC, 27105-1201, USA
www.mxcom.com tel: [phone] 744 5050 fax: [phone]
All trademarks and service marks are held by their respective companies
12V
MOTOROLA
MC34063A
MC7805CT
PSU
TRANSFORMER
Application Notes
General
‘S’ bus interface via RJ45 socket.
RJ11 analog telephone socket and analog circuitry.
ISDN line transformer.
AMD79C30 S-interface controller.
Single asynchronous RS232 interface via 9-way or 25-way D-type connector.
64K bytes external RAM.
16K Non-volatile memory.
Ten processor controlled LED indicator signals.
HDLC drivers for the 2 ISDN B-channels, both channels can be used for data transfer.
Approvals
31909x029
50V
5V
IOM2
BUS
FIFO & DLC Tx DTMF,RING,TONES
POTS SLIC
DISCRETE
S/T CONTROLLER & PCM CODEC
2X(HDLC & FIFO)
POTS
port
PSB 21525
SIEMENS
AMD AM79C30
Figure 3: Application Block Diagram
PARALLEL BUS
5 x Interface ICs
RING & TONES
23
HY 6281009
TxCLID,SPM
128K RAM
RxDTMF
CMX605
C-BUS
BUS
I C
2
16K EEPROM
PROTOCOL ENGINE
4K RAM 128K ROM
24C16
CMX218
2000 Chiron Technology Limited
RS232 V24/1
MAX 238
CMX218 Advance Information
RS232
port
WATCHDOG
TC 1232CO
Doc. # 20480215.001
2000 MX-COM, Inc.
10 x LEDS
API
port