Cologne Chip Designs

ISDN S/T HDLC FIFO Controller (HFC-SP)

Functions

The HFC-SP is a HDLC B- and D-channel controller with integrated S/T interface. It can be used for ISDN basic rate lines. All channels (2B+D) are served fully duplex by six deep FIFOs. The HFC-SP has integrated ISA Plug and Play and a PCMCIA interface. Also implemented is a PCM30 highway interface, which is able to connect to many telecom serial busses, and a microprocessor interface.

Features

single chip ISDN-S-controller with B- and D-channel HDLC support
independent read and write HDLC-channels for 2 ISDN B-channels and one ISDN D-channel
B1 and B2 transparent mode independently selectable
FIFO-Depth:

56 KBit/s restricted mode for U.S. ISDN lines selectable by software
full I.430 ITU S/T ISDN support in TE and NT mode for 3.3V and 5V power supply
B1+B2 HDLC mode
PCM30 interface configurable to interface MITEL ST^TM bus (MVIP^TM), Siemens IOM2^TM or GCI^TM for interface to U-chip or external CODECs
direct 8 bit ISA-PC bus interface with buffers for ISA-databus
integrated ISA Plug and Play (Windows 95 Spec.)
only 2 I/O addresses used on ISA-PC bus
one of 7 interrupt channels on ISA-PC bus selectable by software
integrated PCMCIA interface
microprocessor interface compatible to Motorola bus and Siemens/Intel bus
simple access to PCM30 interface for tone synthetisation
timer with interrupt and watchdog capability in processor mode
for 3.3V and 5V power supply
case QFP 100

Applications

ISDN ISA PC cards
ISDN PCMCIA cards
ISDN terminal adapters (we recommend to use the HFC-S+ because of its better price for stand-alone applications)
ISDN smart NTs (we recommend to use the HFC-S+ because of its better price for stand-alone applications)
ISDN PABX (we recommend to use the HFC-S+ because of its better price for stand-alone applications)
ISDN modems (we recommend to use the HFC-S+ because of its better price for stand-alone applications)