Freescale Semiconductor MPC8260 - Manual (Page 1086)

ATM AAL2
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
32-24 Freescale Semiconductor
32.4.4.1 AAL2 Protocol-Specific RCT
The receive connection table (RCT) is a VC-level table and is where the AAL type for the ATM channel
number is selected. The parameters related to the ATM channel number or to all the RX Queues of the
ATM channel are maintained here. The RCT also contains the pointer to the CID mapping table for the
ATM VC.
Figure 32-15 shows the AAL2-specific RCT.
NOTE
For an active channel, the CP uses a burst cycle to fetch the 32-byte RCT
and writes back only the first 24 bytes.
Table 32-6 describes the AAL2 RCT fields.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Offset + 0x00 — GBL BO — DTB BIB — SEGF ENDF — MAP INTQ
Offset + 0x02 — NoSTF AAL
Offset + 0x04 —
Offset + 0x06
Offset + 0x08
Offset + 0x0A
Offset + 0x0c
Offset + 0x0e
Offset + 0x10
Offset + 0x12
Offset + 0x14
Offset + 0x16
Offset + 0x18 CID Mapping Table Base
Offset + 0x1A
Offset + 0x1C — PMT TBNR Time OUT CNT
Offset + 0x1E Max_CPS_SDU_Deliver_length — EM PM
Figure 32-15. AAL2 Protocol-Specific Receive Connection Table (RCT)