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MC68SC302P/D

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Product Brief

Passive ISDN Protocol Engine

MC68SC302

© 1996 All Rights Reserved.

The MC68SC302 Passive ISDN Protocol Engine (PIPE) is a communication controller optimized for ISDN

passive cards, with an ISA PNP interface and a PCMCIA slave interface. The MC68SC302 is a descendant of

the popular MC68302 Integrated Multiprotocol Processor. The microcoded RISC communications processor

from the 68302 was modified to form the core of the 68SC302. The 68000 core and many related system

integration features were removed to further optimize the device for passive ISDN card applications. The serial

communication channels (SCC) have been optimized for supporting a full ISDN basic rate interface. The three

SCCs support two 64kbit per second B-channels and one 16kbit per second D-channel. The 68SC302 connects

gluelessly to Motorola’s MC145572 U transceiver or MC145574 S/T transceiver and, as an added bonus,

eliminates the need for a second oscillator for the transceiver chip.

MC68SC302 KEY FEATURES

• ISA Bus Interface

— ISA Plug and Play Interface

— Glueless Connections to ISA

— 24mA Buffers for ISA Bus Pins

— Full Support of Plug and Play Standard

— All Chip Registers Accessed from ISA Bus.

— Support for 8- or 16-bit I/O or Memory ISA Cycles

— 11 Selectable Interrupt Output Pins to ISA Bus.

— Additional Chip Select Allows Another Device to Be Accessed from the ISA Bus.

• PCMCIA Interface

— PC Card 95 Compatible

— Two CIS Storage Options:

Dual Port RAM Buffer Space and Always Available for PC Accesses.

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© Freescale Semiconductor, Inc., 2004. All rights reserved.