ATM Controller and AAL0, AAL1, and AAL5
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
30-46 Freescale Semiconductor
Table30-17 describes AAL 5 protocol specific RCT fields. 30.10.2.2.2 AAL5-ABR Protocol-Specific RCTFigure 30-27 shows the AAL5-ABR protocol-specific area of an RCT entry.
015
Offset + 0x0E TML
Offset + 0x10 RX CRC
Offset + 0x12
Offset + 0x14 RBDCNT
Offset + 0x16
Offset + 0x18 RXBM RXFM BPOOL

Figure 30-26. AAL5 Protocol-Specific RCT

Table30-17. RCT Settings (AAL5 Protocol-Specific)

Offset Bits Name Description
0x0E TML Total message length. This field is used by the CP.
0x10 RxCRC CRC32 temporary result.
0x14 RBDCNT RxBD count. Indicates how may bytes remain in the current Rx buffer. RBDCNT is
initialized with MRBLR whenever the CP opens a new buffer.
0x16 Reserved, should be cleared.
0x18 0–7 Reserved, should be cleared.
8 RXBM Receive buffer interrupt mask. Determines whether the receive buffer event is
disabled. Can be changed on-the-fly.
0 The event is disabled for this channel. (The RXB event is not sent to the interrupt
queue when receive buffers are closed.)
1 The event is enabled for this channel.
9 RXFM Receive frame interrupt mask. Determines whether the receive frame event is
disabled. Can be changed on-the-fly.
0 The event is disabled for this channel. (RXF event is not sent to the interrupt queue.)
1 The event is enabled for this channel.
10–13 Reserved, should be cleared.
14–15 BPOOL Buffer pool. Global buffer allocation mode only. Points to one of four free buffer pools.
See Section 30.10.5.2.4, “Free Buffer Pool Parameter Tables.”