Motorola PowerQUICC II MPC8280 Series Reference Manual page 1017

– Abort message option
• AAL1 cell format
— Reassembly
– Reassemble PDU directly to external memory
– Support for partially filled cells (configurable on a per-VC basis)
– Sequence number check
– Sequence number protection (CRC-3 and parity) check
— Segmentation
– Segment PDU directly from external memory
– Partially filled cells support (configurable on a per-VC basis)
– Sequence number generation
– Sequence number protection (CRC-3 and even parity) generation
— Structured AAL1 cell format
– Automatic synchronization using the structured pointer during reassembly
– Structured pointer generation during segmentation
— Unstructured AAL1 cell format
– Clock recovery using external SRTS (synchronous residual time stamp) logic
during reassembly
– SRTS generation using external logic during segmentation
• AAL0 format
— Receive
– Whole cell is put in memory
– CRC10 pass/fail indication
— Transmit
– Reads a whole cell from memory
– CRC10 insertion option
• AAL1 circuit emulation service (refer to Chapter 32, "ATM AAL1 Circuit
Emulation Service," for more information)
• AAL2 format
— Refer to Chapter 33, "ATM AAL2"
• Support for user-defined cells
— Support cells up to 65 bytes
— Extra header insert/load on a per-frame basis
— Extra header size has byte resolution
MOTOROLA Chapter 31. ATM Controller and AAL0, AAL1, and AAL5
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Features
31-3