Cologne Chip Designs

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

Functions

The HFC-S+ 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 an integrated PC-ISA bus interface, a PCM30 highway interface 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-channel 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 data bus
one of 6 interrupt channels on ISA-PC bus selectable by software
I/O address selectable by software
only 2 I/O addresses used on PC-ISA bus
microprocessor interface compatible to Motorola bus and Siemens/Intel bus
simple DMA access to PCM30 interface for tone synthetisation
timer with interrupt and watchdog capability in processor mode
3.3V and 5V supply voltage
case QFP 100

Applications

ISDN PC cards (we recommend to use the HFC-SP instead because of its integrated ISA PnP)
ISDN terminal adapters
ISDN mini PABX
ISDN smart NT
ISDN modems (like USB devices)