Freescale Semiconductor MPC8260 - Manual (Page 993)

ATM Controller and AAL0, AAL1, and AAL5
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 30-73
30.10.5.5 AAL1 RxBD
Figure 30-47 shows the AAL1 RxBD.
Table 30-36 describes AAL1 RxBD fields.
0x02 — DL Data length. The number of octets written by the CP into this BD’s buffer. It is written
by the CP once the BD is closed. In the last BD of a frame, DL contains the total frame
length.
0x04 RXDBPTR Rx data buffer pointer. Points to the first location of the associated buffer; may reside
in internal or external memory. It is recommended that the pointer be burst-aligned.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Offset + 0x00 E — W I SNE — CM —
Offset + 0x02 Data Length
Offset + 0x04 Rx Data Buffer Pointer
Offset + 0x06
Figure 30-47. AAL1 RxBD
Table 30-35. AAL5 RxBD Field Descriptions (continued)
Offset Bits Name Description