Microchip Technology TDGL019 Data Sheet
© 2011-2014 Microchip Technology Inc.
DS60001168F-page 127
PIC32MX1XX/2XX
REGISTER 10-5:
U1PWRC: USB POWER CONTROL REGISTER
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
23:16
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
15:8
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
7:0
R-0
U-0
U-0
R/W-0
R/W-0
U-0
R/W-0
R/W-0
UACTPND
—
—
USLPGRD USBBUSY
(1)
—
USUSPEND USBPWR
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 31-8 Unimplemented: Read as ‘0’
bit 7
bit 7
UACTPND:
USB Activity Pending bit
1
= USB bus activity has been detected; however, an interrupt is pending, which has yet to be generated
0
= An interrupt is not pending
bit 6-5
Unimplemented:
Read as ‘0’
bit 4
USLPGRD:
USB Sleep Entry Guard bit
1
= Sleep entry is blocked if USB bus activity is detected or if a notification is pending
0
= USB module does not block Sleep entry
bit 3
USBBUSY:
USB Module Busy bit
(1)
1
= USB module is active or disabled, but not ready to be enabled
0
= USB module is not active and is ready to be enabled
bit 2
Unimplemented:
Read as ‘0’
bit 1
USUSPEND:
USB Suspend Mode bit
1
= USB module is placed in Suspend mode
(The 48 MHz USB clock will be gated off. The transceiver is placed in a low-power state.)
0
= USB module operates normally
bit 0
USBPWR:
USB Operation Enable bit
1
= USB module is turned on
0
= USB module is disabled
(Outputs held inactive, device pins not used by USB, analog features are shut down to reduce power
consumption.)
consumption.)
Note 1:
When USBPWR = 0 and USBBUSY = 1, status from all other registers is invalid and writes to all USB
module registers produce undefined results.
module registers produce undefined results.