Aal5-Abr Protocol-Specific Rct - Motorola MPC8260 PowerQUICC II User Manual

Part IV. Communications Processor Module
Table 29-17 describes AAL5 protocol speciÞc RCT Þelds.
Table 29-17. RCT Settings (AAL5 Protocol-Specific)
Offset Bits Name
0x0E Ñ TML
0x10 Ñ RxCRC
0x14 Ñ RBDCNT RxBD count. Indicates how may bytes remain in the current Rx buffer. RBDCNT is
0x16 Ñ Ñ
0x18 0Ð7 Ñ
8 RXBM
9 RXFM
10Ð13 Ñ
14Ð15 BPOOL Buffer pool. Global buffer allocation mode only. Points to one of four free buffer pools. See
29.10.2.2.2 AAL5-ABR Protocol-SpeciÞc RCT
Figure 29-27 shows the AAL5-ABR protocol-speciÞc area of an RCT entry.
0 1
Offset + 0x0E
Offset + 0x10
Offset + 0x12
Offset + 0x14
Offset + 0x16
Offset + 0x18
Figure 29-27. AAL5-ABR Protocol-Specific RCT
29-47
Total message length. This Þeld is used by the CP.
CRC32 temporary result.
initialized with MRBLR whenever the CP opens a new buffer.
Reserved, should be cleared.
Reserved, should be cleared.
Receive buffer interrupt mask. Determines whether the receive buffer event is disabled.
Can be changed on-the-ßy.
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.
Receive frame interrupt mask. Determines whether the receive frame event is disabled.
Can be changed on-the-ßy.
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.
Reserved, should be cleared.
Section 29.10.5.2.4, ÒFree Buffer Pool Parameter Tables.Ó
2 3 4 5
RDF RIF
MPC8260 PowerQUICC II UserÕs Manual
Description
6 7 8 9 10
AAL5 Protocol-SpeciÞc
PCR
AAL5 Protocol-SpeciÞc
11 12 13 14 15
MOTOROLA