Digital Subscriber Controller (DSC) Circuit
FINAL
Am79C30A/32A
Digital Subscriber Controller™ (DSC™) Circuit
DISTINCTIVE CHARACTERISTICS
s Combines CCITT I.430 S/T...
Description
FINAL
Am79C30A/32A
Digital Subscriber Controller™ (DSC™) Circuit
DISTINCTIVE CHARACTERISTICS
s Combines CCITT I.430 S/T-Interface Transceiver, D-Channel LAPD Processor, Audio s Processor (DSC device only), and IOM-2 Interface in a single chip s Special operating modes allow realization of CCITT I.430 power-compliant terminal equipment s S- or T-Interface Transceiver — Level 1 Physical Layer Controller — Supports point-to-point, short and extended passive bus configurations — Provides multiframe support s Certified protocol software support available s CMOS technology, TTL compatible s D-channel processing capability — Flag generation/detection — CRC generation/checking — Zero insertion/deletion — Four 2-byte address detectors — 32-byte receive and 16-byte transmit FIFOs
BLOCK DIAGRAM
SBP/IOM-2 Interface CAP1 CAP2 SBIN SCLK BCL/CH2STRB* SBIOUT SFS
HSW
AINA AREF AINB EAR1 EAR2 LS1 LS2
Audio Interface
Main Audio Processor (MAP) (Am79C30A Only)
Peripheral Port (PP)
S/T Line Interface Unit (LIU) D Channel B1
LOUT1 LOUT2 LIN1 LIN2
Bd Be Bf
Ba
B-channel Multiplexer (MUX)
B2 D-Channel Data Link Controller (DLC)
XTAL1 XTAL2 MCLK
Oscillator (OSC) Bb Bc
D Channel CS WR RD Microprocessor Interface (MUX) RESET
D7 D6 D5 D4 D3 D2 D1 D0 INT A2 Microprocessor Interface
A1 A0 09893H-1
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