Datasheet

 2011-2012 Microchip Technology Inc. Preliminary DS61168E-page 125
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 UACTPND: USB Activity Pending bit
1 = USB bus activity has been detected; but an interrupt is pending, it has not been generated yet
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.)
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.