Motorola MPC8260 User Manual

MOTOROLA

Chapter 14. Serial Interface with Time-Slot Assigner

14-3

Part IV. Communications Processor Module

14.1 Features

Each SI has the following features:

Can connect to four independent TDM channels. Each TDM can be one of the
following:

Ñ T1 or E1 line

Ñ Integrated services digital network primary rate (PRI)

Ñ An ISDN basic rateÐinterchip digital link (IDL) channel in up to four TDM

channelsÑeach IDL channel requires support from a separate SCC

Ñ ISDN basic rateÐgeneral circuit interface (GCI) in up to two TDM channelsÑ

each GCI channel requires support from a separate SMC

Ñ E3 or DS3 clear channel (on TDMa only)

Ñ User-deÞned interfaces

Independent, programmable transmit and receive routing paths

Independent transmit and receive frame syncs allowed

Independent transmit and receive clocks allowed

Selection of rising/falling clock edges for the frame sync and data bits

Supports 1

´ and 2´ input clocks (1 or 2 clocks per data bit)

Selectable delay (0Ð3 bits) between frame sync and frame start

Four programmable strobe outputs and four (2

´) clock output pins

1- or 8-bit resolution in routing, masking, and strobe selection

Supports frames up to 16,384 bits long

Internal routing and strobe selection can be dynamically programmed

Supports automatic echo and loopback mode for each TDM

Supports parallel-nibble interface for E3 or DS3 on TDMa channel

For the MCC route, the SI performs the following features:

Up to 128 independent communication channels (64-Kbps per channel)

Arbitrary mapping of any TDM time slots

Can connect up to four independent TDM channels. Each TDM channel can support
up to 128 channels (all four channels can support up to 128 channels together).

Independent mapping for receive/transmit

Individual channel echo or loop mode

Global echo or loop mode through the SI