PIC32MX1XX Datasheet, PDF (127/320 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
REGISTER 10-5: U1PWRC: USB POWER CONTROL REGISTER
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Range 31/23/15/7 30/22/14/6 29/21/13/5 28/20/12/4 27/19/11/3 26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
U-0
U-0
31:24
—
—
U-0
U-0
23:16
—
—
U-0
U-0
15:8
—
—
R-0
U-0
7:0
UACTPND
—
U-0
U-0
U-0
—
—
—
U-0
U-0
U-0
—
—
—
U-0
U-0
U-0
—
—
—
U-0
R/W-0
R/W-0
—
USLPGRD USBBUSY
U-0
U-0
U-0
—
—
—
U-0
U-0
U-0
—
—
—
U-0
U-0
U-0
—
—
—
U-0
R/W-0
R/W-0
—
USUSPEND USBPWR
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘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
Note: When USBPWR = 0 and USBBUSY = 1, status from all other registers is invalid and writes to all
USB module registers produce undefined results.
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.)
© 2011-2012 Microchip Technology Inc.
Preliminary
DS61168D-page 127