Freescale Semiconductor PowerQUICC MPC885 Reference Manual page 981

0 1
OFFSET + 0 R —
OFFSET + 2
OFFSET + 4
OFFSET + 8
OFFSET + A
For UTOPIA operation, a global option to support expanded cells is available. ATM TxBDs in expanded
cell mode are 24 bytes, as shown in
0 1
OFFSET + 0 R —
OFFSET + 2
OFFSET + 4
OFFSET + 8
OFFSET + A
OFFSET + C
OFFSET + 10
OFFSET + 14
Figure 37-6. ATM TxBD in Expanded Cell Mode (UTOPIA Only)
Freescale Semiconductor
2 3 4 5 6
W I L OAM CM
TX DATA BUFFER POINTER
CPCS-UU+CPI/HEADER_L
RESERVED/HEADER_H
Figure 37-5. ATM TxBD
Figure 37-6.
2 3 4 5 6
W I L OAM CM
TX DATA BUFFER POINTER
CPCS-UU+CPI/HEADER_L
RESERVED/HEADER_H
CELL HEADER EXPANSION 1
CELL HEADER EXPANSION 2
CELL HEADER EXPANSION 3
MPC885 PowerQUICC Family Reference Manual, Rev. 2
Buffer Descriptors and Connection Tables
7 8 9 10 11
— — — — —
DATA LENGTH
7 8 9 10 11
— — — — —
DATA LENGTH
12 13 14 15
— ICNG RH ICLP
12 13 14 15
— ICNG RH ICLP
37-7