ATM Pace Control
MPC885 PowerQUICC Family Reference Manual, Rev. 2
40-18
Freescale Semiconductor
APCNT
APC N timer. Used internally by the APC. It should be initialized by the user to zero. The APC adds NCITS
to this timer on every APC Timer request. This timer holds the APC N parameter and additional cell
fraction remainder which is used by the APC. The APCNT field is defined as follows
:
The APCNT bit fields are described below.
APC_MI
Max iteration. Number of times/steps that the APC advances the service pointer. This parameter limits the
time spent in a single APC routine, thereby avoiding excessive APC latency. The recommended start
value for APC_MI is equal to the minimum value of TCT[APCP] of all channels, multiplied by the number
of configured priority levels. The value is application dependent to a certain extent and may need to be
adjusted. It should be kept as low as possible for the application and should neither be less than 2 or
exceed 32.APC_MI must be set in the first APC level for each configured PHY.
Table 40-2. APC Priority Level Parameter Descriptions (continued)
Name
Description
0 7
8 15
CF
N
Bits
Name
Description
0–7
CF
Cell fraction used by the APC.
8–15
N
APC N parameter.
Содержание PowerQUICC MPC870
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Страница 794: ...SCC Transparent Mode MPC885 PowerQUICC Family Reference Manual Rev 2 28 14 Freescale Semiconductor ...
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Страница 1004: ...Buffer Descriptors and Connection Tables MPC885 PowerQUICC Family Reference Manual Rev 2 37 30 Freescale Semiconductor ...
Страница 1022: ...ATM Parameter RAM MPC885 PowerQUICC Family Reference Manual Rev 2 38 18 Freescale Semiconductor ...
Страница 1068: ...ATM Pace Control MPC885 PowerQUICC Family Reference Manual Rev 2 40 22 Freescale Semiconductor ...
Страница 1090: ...UTOPIA Interface MPC885 PowerQUICC Family Reference Manual Rev 2 43 8 Freescale Semiconductor ...
Страница 1120: ...AAL2 Implementation MPC885 PowerQUICC Family Reference Manual Rev 2 44 30 Freescale Semiconductor ...
Страница 1162: ...Fast Ethernet Controller FEC MPC885 PowerQUICC Family Reference Manual Rev 2 45 40 Freescale Semiconductor ...
Страница 1172: ...SEC Lite Overview MPC885 PowerQUICC Family Reference Manual Rev 2 46 8 Freescale Semiconductor ...
Страница 1176: ...SEC Lite Address Map MPC885 PowerQUICC Family Reference Manual Rev 2 47 4 Freescale Semiconductor ...
Страница 1214: ...SEC Lite Execution Units MPC885 PowerQUICC Family Reference Manual Rev 2 48 38 Freescale Semiconductor ...
Страница 1312: ...Byte Ordering MPC885 PowerQUICC Family Reference Manual Rev 2 A 8 Freescale Semiconductor ...
Страница 1313: ...MPC885 PowerQUICC Family Reference Manual Rev 2 Freescale Semiconductor B 1 Appendix B Serial Communications Performance TBD ...
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Страница 1320: ...Register Quick Reference Guide MPC885 PowerQUICC Family Reference Manual Rev 2 C 6 Freescale Semiconductor ...
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