PIC18F44J50-I Datasheet, PDF (368/562 Pages) Microchip Technology – 28/44-Pin, Low-Power, High-Performance USB Microcontrollers

PIC18F46J50 FAMILY
REGISTER 22-5: BDnSTAT: BUFFER DESCRIPTOR n STATUS REGISTER (BD0STAT THROUGH
BD63STAT), CPU MODE (BANKED 4xxh)
R/W-x
UOWN⁽¹⁾
bit 7
R/W-x
DTS⁽²⁾
R/W-0
r⁽³⁾
R/W-0
r⁽³⁾
R/W-x
DTSEN
R/W-x
BSTALL
R/W-x
BC9
R/W-x
BC8
bit 0
Legend:
R = Readable bit
-n = Value at POR
r = Reserved bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5-4
bit 3
bit 2
bit 1-0
UOWN: USB Own bit⁽¹⁾
0 = The microcontroller core owns the BD and its corresponding buffer
DTS: Data Toggle Synchronization bit⁽²⁾
1 = Data 1 packet
0 = Data 0 packet
Reserved: These bits should always be programmed to ‘0’⁽³⁾
DTSEN: Data Toggle Synchronization Enable bit
1 = Data toggle synchronization is enabled; data packets with an incorrect Sync value will be ignored,
except for a SETUP transaction, which is accepted even if the data toggle bits do not match
0 = No data toggle synchronization is performed
BSTALL: Buffer Stall Enable bit
1 = Buffer stall is 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)
0 = Buffer stall is disabled
BC<9:8>: Byte Count 9 and 8 bits
The byte count bits represent the number of bytes that will be transmitted for an IN token or received
during an OUT token. Together with BC<7:0>, the valid byte counts are 0-1023.
Note 1:
2:
3:
This bit must be initialized by the user to the desired value prior to enabling the USB module.
This bit is ignored unless DTSEN = 1.
If these bits are set, USB communication may not work. Hence, these bits should always be maintained as ‘0’.
DS39931D-page 368
 2011 Microchip Technology Inc.