Datasheet

 2009 Microchip Technology Inc. DS39897C-page 215
PIC24FJ256GB110 FAMILY
REGISTER 18-2: BDnSTAT: BUFFER DESCRIPTOR n STATUS REGISTER PROTOTYPE,
CPU MODE (BD0STAT THROUGH BD63STAT)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
UOWN DTS
(1)
0 0 DTSEN BSTALL BC9 BC8
bit 15 bit 8
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
BC7 BC6 BC5 BC4 BC3 BC2 BC1 BC0
bit 7 bit 0
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 15 UOWN: USB Own bit
0 = The microcontroller core owns the BD and its corresponding buffer. The USB module ignores all
other fields in the BD.
bit 14 DTS: Data Toggle Packet bit
(1)
1 = Data 1 packet
0 = Data 0 packet
bit 13-12 Reserved Function: Maintain as ‘0’
bit 11 DTSEN: Data Toggle Synchronization Enable bit
1 = Data toggle synchronization is enabled; data packets with incorrect sync value will be ignored
0 = No data toggle synchronization is performed
bit 10 BSTALL: Buffer Stall Enable bit
1 = Buffer STALL enabled; STALL handshake issued if a token is received that would use the BD in
the given location (UOWN bit remains set, BD value is unchanged); corresponding EPSTALL bit
will get set on any STALL handshake
0 = Buffer STALL disabled
bit 9-0 BC<9:0>: Byte Count bits
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.
Note 1: This bit is ignored unless DTSEN = 1.