Motorola PowerQUICC II MPC8280 Series Reference Manual page 1133

One MCC super channel that
contains only 4 active channels
Slot 0 Slot 1
Example of one MCC super channel in ESF framing (T1) containing 4 TDM slots connected to
an ATM channel with one CAS routing table (CRT). See Section 1.4.7.1, "CAS Routing Table."
32.4.7.1 CAS Routing Table
Figure 32-10 shows the structure of a CAS routing table. The CP maintains a pointer which
steps through the table and wraps back to the beginning of the table after servicing the last
entry (W=1).
First signaling nibble
ATM current pointer
Last signaling nibble
Figure 32-10. AAL1 CES CAS Routing Table (CRT)
Figure 32-11 describes the structure of a CAS routing table entry.
0
Offset + 0x00 W
Figure 32-11. AAL1 CES CAS Routing Table Entry
MOTOROLA
Freescale Semiconductor, Inc.
XXXX
Slot 2 • • • • • •
Figure 32-9. Mapping CAS Entry
W=0 —
W=0 —
W=0 —
W=0 —
W=0 —
W=1 —
1 2
— F/S
Chapter 32. ATM AAL1 Circuit Emulation Service
For More Information On This Product,
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F/S=0 One ATM CAS
routing table
ABCD
0 0
0 0
0 0
1 0
Slot 23
Byte
F/S Signaling offset pointer
F/S Signaling offset pointer
F/S Signaling offset pointer
F/S Signaling offset pointer
F/S Signaling offset pointer
F/S Signaling offset pointer
3
Signaling offset pointer (SOP)
Interworking Functions
0 0
0 1
0 2
0 23
7
32-13