PIC24FJ256GB108-I Datasheet, PDF (214/352 Pages) Microchip Technology – 64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)

PIC24FJ256GB110 FAMILY
REGISTER 18-1: BDnSTAT: BUFFER DESCRIPTOR n STATUS REGISTER PROTOTYPE,
USB MODE (BD0STAT THROUGH BD63STAT)
R/W-x
UOWN
bit 15
R/W-x
DTS
R/W-x
PID3
R/W-x
PID2
R/W-x
PID1
R/W-x
PID0
R/W-x
BC9
R/W-x
BC8
bit 8
R/W-x
BC7
bit 7
R/W-x
BC6
R/W-x
BC5
R/W-x
BC4
R/W-x
BC3
R/W-x
BC2
R/W-x
BC1
R/W-x
BC0
bit 0
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 15
bit 14
bit 13-10
bit 9-0
UOWN: USB Own bit
1 = The USB module owns the BD and its corresponding buffer; the CPU must not modify the BD or
the buffer
DTS: Data Toggle Packet bit
1 = Data 1 packet
0 = Data 0 packet
PID<3:0>: Packet Identifier bits (written by the USB module)
In Device mode:
Represents the PID of the received token during the last transfer.
In Host mode:
Represents the last returned PID or the transfer status indicator.
BC<9:0>: Byte Count
This represents the number of bytes to be transmitted or the maximum number of bytes to be received
during a transfer. Upon completion, the byte count is updated by the USB module with the actual
number of bytes transmitted or received.
DS39897C-page 214
 2009 Microchip Technology Inc.