Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 176)

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101

W90P710CD/W90P710CDG

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Host Controller Command Status Register

RESET

VALUE

HcCommandStatus 0xFFF0_5008

R/W Host Controller Command Status Register 0x0000_0000

31 30 29 28 27 26 25 24

Reserved

23 22 21 20 19 18 17 16

Reserved

15 14 13 12 11 10 9 8

Reserved

7 6 5 4 3 2 1 0

Reserved OCR BLF CLF HCR

BITS DESCRIPTION

[31:18] Reserved

Reserved

[17:16] SOC

ScheduleOverrunCount

This field is increment every time the SchedulingOverrun bit in

HcInterruptStatus is set. The count wraps from ‘11’ to ‘00.’

[15:4] Reserved

Reserved. Read/Write 0's

[3] OCR

OwnershipChangeRequest

When set by software, this bit sets the OwnershipChange field in

HcInterruptStatus. The bit is cleared by software.

[2] BLF

BulkListFilled

Set to indicate there is an active ED on the Bulk List. The bit may be

set by either software or the Host Controller and cleared by the Host

Controller each time it begins processing the head of the Bulk List.

[1] CLF

ControlListFilled

Set to indicate there is an active ED on the Control List. It may be set

by either software or the Host Controller and cleared by the Host

Controller each time it begins processing the head of the Control List.

[0] HCR

HostControllerReset

This bit is set to initiate the software reset. This bit is cleared by the

Host Controller, upon completed of the reset operation.

1 2 ... 171 172 173 174 175 176 177 178 179 180 181 ... 551 552

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 176

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