Serial Interface with Time-Slot Assigner
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 15-3
15.1 Features
Each SI has the following features:
Can connect to four independent TDM channels. Each TDM can be one of the following:
T1 or E1 line
Integrated services digital network primary rate (PRI)
An ISDN basic rate–interchip digital link (IDL) channel in up to four TDM channels—each
IDL channel requires support from a separate SCC
ISDN basic rate–general circuit interface (GCI) in up to two T DM channels—each GCI
channel requires support from a separate SMC
E3 or DS3 clear channel on TDMa only (parallel-nibble interface)
User-defined 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 (0–3 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
Maximum TDM frequency is serial-dependent:
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).
CPM Clock
7
for MCCs
CPM Clock
6
for FCCs transparent
for all other serials CPM Clock
3
for FCCs HDLC
CPM Clock
4
for FCCs HDLC nibble mode