|
Functions
The HFC-U is a HDLC B- and D-channel controller. It can be used for ISDN
basic rate lines. All channels (2B+D) are served fully duplex by six deep
FIFOs. Also implemented is a ISA-PC bus interface and a microprocessor
interface.
Features
-
FIFO-Depth:
B-channel: 4x 7.5 KByte, maximum 31 HDLC frames per FIFO
D-channel: 2x 512 Byte, maximum 15 HDLC frames per FIFO
-
independent read/write HDLC-channels for two ISDN B-channels and one ISDN
D-channel
-
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
-
PCM30 interface configurable to interface MITEL STTM bus (MVIPTM),
Siemens IOM2TM or GCITM for interface to U-chip
-
direct 8 bit ISA-PC bus interface with buffers for ISA data bus; one of
6 interrupt channels selectable by software
-
microprocessor interface compatible to Motorola bus and Siemens/Intel bus
-
only 2 I/O addresses used on PC ISA bus; I/O addresses programmable (no
memory mapping, no DMA)
-
CMOS technology 3V-5V, case QFP 100
|
Homepage
E-Mail