Motorola PowerQUICC II MPC8280 Series Reference Manual page 1060

ATM Memory Structure
INT_RCT_BASE
Figure 31-24. Example of a 1024-Entry Receive Connection Table
The general formula for determining the real starting address for all internal and external
connection table entries is as follows:
Connection table base address + (channel code × 32)
Thus, the real starting address of the RCT entry associated with channel code 3 is as
follows:
INT_RCT_BASE+ (3 × 32) = INT_RCT_BASE + 96
Even though it produces a gap in the connection table, the first external channel's real
starting address of the RCT entry (channel code 256) is as follows:
EXT_RCT_BASE+ (256 × 32) = EXT_RCT_BASE + 8192
See Section 31.10.1, "Parameter RAM," to find all the connection table base address
parameters. (The transmit connection table base address parameters are INT_TCT_BASE,
EXT_TCT_BASE, INT_TCTE_BASE, and EXT_TCTE_BASE.)
31.10.2.2 Receive Connection Table (RCT)
Figure 31-25 shows the format of an RCT entry.
31-46
Freescale Semiconductor, Inc.
Dual-Port RAM
Reserved
Raw Cell (AAL0)
RCT2
RCT3
RCT63
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EXT_RCT_BASE
External Memory
RCT256
RCT257
RCT258
RCT259
RCT1217
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