Motorola MPC8260 - Manual (Page 834)

29-54 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
Part IV. Communications Processor Module
29.10.2.3.1 AAL5 Protocol-SpeciÞc TCT
Figure 29-31 shows the AAL5 protocol-speciÞc TCT.
Table 29-22 describes AAL5 protocol-speciÞc TCT Þelds.
29.10.2.3.2 AAL1 Protocol-SpeciÞc TCT
Figure 29-32 shows the AAL1 protocol-speciÞc TCT.
0x1E 14 IMK Interrupt mask. Can be changed on-the-ßy.
0 The transmit buffer event of this channel is masked. (TXB event is not sent to the
interrupt queue.)
1 The transmit buffer event of this channel is enabled.
15 PM Performance monitoring. Can be changed on-the-ßy.
0 No performance monitoring for this VC.
1 Performance is monitored for this VC. When a cell is sent for this VC, the
performance monitoring table indicated in PMT Þeld is updated.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Offset + 0x10 Tx CRC
Offset + 0x12
Offset + 0x14 Total Message Length
Figure 29-31. AAL5 Protocol-Specific TCT
Table 29-22. AAL5-Specific TCT Field Descriptions
Offset Name Description
0x10 Tx CRC CRC32 temporary result.
0x14 Total Message Length This Þeld is used by the CP.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Offset + 0x10 Ñ Valid Octet Size (VOS) PFM SRT SPF STF Ñ SN
Offset + 0x12 SRTS Device Block Size
Offset + 0x14 SRTS_TMP Structured Pointer (SP)
Figure 29-32. AAL1 Protocol-Specific TCT
Table 29-21. TCT Field Descriptions (Continued)
Offset Bits Name Description