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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
MOTOROLA
Chapter 14. Serial Interface with Time-Slot Assigner
Part IV. Communications Processor Module
14-3
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