Table 28-8 Device Request Status - Motorola DragonBall MC9328MX1 Reference Manual

USB Device Port
Table 28-7. USB Control Register Description (Continued)
Name
UDC_RST UDC Reset—Executes a hard reset sequence on the UDC
Bit 2 module in accordance with the UDC specification. It allows
the system software to force a reset of the UDC's logic
when the system is first connected to the USB, or for
debugging purposes.
AFE_ENA Analog Front-End Enable—Enables/Disables the analog
Bit 1 front-end to the USB. This can be either an external chip or
an on-chip transceiver module. Use AFE_ENA to
power-down the AFE.
RESUME Resume—Initiates resume signaling on the USB.
Bit 0 Automatically resets to 0 after a write. Remote wake-up
capability is controlled in the UDC through the
CLEAR_FEATURE request. Software must have a
time-out feature that aborts the remote wake-up attempt
when the RESUME interrupt does not occur after a
specified time.
Application processed the device request successfully
Application encountered an error while processing the request
Application is busy completing the request
28-12
Description
Table 28-8. Device Request Status
Result of Transfer
MC9328MX1 Reference Manual
Settings
0 = No effect
1 = Hard reset of the UDC
0 = AFE disabled
1 = AFE enabled
0 = No effect
1 = Initiate resume signaling on the
bus when the remote wake-up
capability is enabled for the
current USB configuration.
When the remote wake-up
capability is disabled, RESUME
has no effect.
CMD_OVER CMD_ERROR
0 0
0 1
1 X
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