Microchip Technology AC164139 データシート
2010 Microchip Technology Inc.
DS39969B-page 257
PIC24FJ256DA210 FAMILY
REGISTER 18-5:
U1PWRC: USB POWER CONTROL REGISTER
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 15
bit 8
R/W-0, HS
U-0
U-0
R/W-0
U-0
U-0
R/W-0, HC
R/W-0
UACTPND
—
—
USLPGRD
—
—
USUSPND
USBPWR
bit 7
bit 0
Legend:
HS = Hardware Settable bit
HC = Hardware Clearable bit
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 15-8
Unimplemented: Read as ‘0’
bit 7
UACTPND: USB Activity Pending bit
1
= Module should not be suspended at the moment (requires the USLPGRD bit to be set)
0
= Module may be suspended or powered down
bit 6-5
Unimplemented: Read as ‘0’
bit 4
USLPGRD: Sleep/Suspend Guard bit
1
= Indicate to the USB module that it is about to be suspended or powered down
0
= No suspend
bit 3-2
Unimplemented: Read as ‘0’
bit 1
USUSPND: USB Suspend Mode Enable bit
1
1
= USB OTG module is in Suspend mode; USB clock is gated and the transceiver is placed in a
low-power state
0
= Normal USB OTG operation
bit 0
USBPWR: USB Operation Enable bit
1
1
= USB OTG module is enabled
0
= USB OTG module is disabled
(1)
Note 1:
Do not clear this bit unless the HOSTEN, USBEN and OTGEN bits (U1CON<3,0> and U1OTGCON<2>)
are all cleared.
are all cleared.