Service_USB 17 - USB system module stopped
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## Name

Service_USB 17 - USB system module stopped — Used to indicate to other applications that part of the USB system has shut down.

## On Entry

R0 | 17 (reason code)
R1 | &80C00 (USB Service call)
R2, R3, R4 | Same as Service_USB 16

## On Exit

R0 | preserved
R1 | preserved to pass on (do not claim)
R2, R3, R4 | preserved

## Use

This service call is produced by all core USB system modules. It is sent by a module after it has ceased operation. User device drivers do not issue this service. Each type of USB component has a unique type identifier, if you write a module that you feel requires an allocation please contact Simtec Electronics for details.

Depending on the stopping module's type, other modules may perform additional activities. Regardless of this the service call must not be claimed.

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Service_USB 16 - USB system module started | Home | Service_USB 18 - USB system module pre-stop