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M451
May. 4, 2018
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Rev.2.08
M4
51
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[2]
PLE
Periodic List Enable Bit
When set, this bit enables processing of the Periodic (interrupt and isochronous) list. The
Host Controller checks this bit prior to attempting any periodic transfers in a frame.
0 = Processing of the Periodic (Interrupt and Isochronous) list after next SOF (Start-Of-
Frame) Disabled.
1 = Processing of the Periodic (Interrupt and Isochronous) list in the next frame Enabled.
Note:
To enable the processing of the Isochronous list, user has to set both PLE and IE
(HcControl[3]) high.
[1:0]
CBSR
Control Bulk Service Ratio
This specifies the service ratio between Control and Bulk EDs. Before processing any of
the non-periodic lists, HC must compare the ratio specified with its internal count on how
many nonempty Control EDs have been processed, in determining whether to continue
serving another Control ED or switching to Bulk EDs. The internal count will be retained
when crossing the frame boundary. In case of reset, HCD is responsible for restoring this
Value.
00 = Number of Control EDs over Bulk EDs served is 1:1.
01 = Number of Control EDs over Bulk EDs served is 2:1.
10 = Number of Control EDs over Bulk EDs served is 3:1.
11 = Number of Control EDs over Bulk EDs served is 4:1.
Содержание ARM Cortex NuMicro M451 Series
Страница 301: ...M451 May 4 2018 Page 301 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL...
Страница 324: ...M451 May 4 2018 Page 324 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL Figure 6 4 18 Checksum Calculation Flow...
Страница 355: ...M451 May 4 2018 Page 355 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 2 0 Reserved Reserved...
Страница 625: ...M451 May 4 2018 Page 625 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 00 5 bits 01 6 bits 10 7 bits 11 8 bits...
Страница 721: ...M451 May 4 2018 Page 721 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL the SCL line 1 0 Reserved Reserved...
Страница 1001: ...M451 May 4 2018 Page 1001 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 10x10x1 4 mm footprint 2 0 mm 9 2...
Страница 1002: ...M451 May 4 2018 Page 1002 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 7x7x1 4 mm footprint 2 0 mm 9 3...
Страница 1003: ...M451 May 4 2018 Page 1003 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 48L 7x7x1 4mm footprint 2 0mm 9 4...