ATM Controller and AAL0, AAL1, and AAL5
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 30-3
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
Uns tructured 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 31, “ATM AAL1 Circuit Emulation Service,” for
more information)
AAL2 format
Refer to Chapter32, “ATM AAL2”
Support for user-defined cells
S upport cells up to 65 bytes
Extra header insert/load on a per-frame basis
E xtra header size has byte resolution
Asymmetric cell size for send and receive
HEC octet insertion option
•PHY
UTOPIA level II supports 8/16 bits 25/50 MHz
Supports UTOPIA master and slave modes
Supports cell-level handshake
Supports multiple-PHY polling mode
ATM pace control (APC) unit
Peak cell rate pacing on a per-VC basis
Peak-and-sustain cell rate pacing using GCRA on a per-VC basis
Peak-and-minimum cell rate pacing on a per-VC basis
Up to eight priority levels
F ully managed by CP with no host intervention
Available bit rate (ABR)