ATM Controller and AAL0, AAL1, and AAL5
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 30-59
Table30-26 describes UBR+ protocol-specific TCTE fields.30.10.2.3.8 ABR Protocol-Specific TCTEFigure 30-36 shows the ABR protocol-specific TCTE.
07815
Offset + 0x00 MCR
Offset + 0x02 MCR Fraction (MCRF)
Offset + 0x04 Maximum Delay Allowed (MDA)
Offset + 0x06–0x1E

Figure 30-35. UBR+ Protocol-Specific TCTE

Table30-26. UBR+ Protocol-Specific TCTE Field Descriptions

Offset Bits Name Description
0x00 MCR Minimum cell rate for this channel. MCR is in units of APC time slots.
0x02 0–7 Reserved, should be cleared.
8–15 MCRF Minimum cell rate fraction. Holds the minimum cell rate fraction of this channel in units of
1/256 slot.
0x04 MDA Maximum delay allowed. The maximum time-slot service delay allowed for this priority level
before the APC reduces the scheduling rate from PCR to MCR.
0x06–
0x1E
Reserved, should be cleared.