Microchip Technology AC164139 Data Sheet

DS39969B-page 246

 2010 Microchip Technology Inc.

 

 

R/W-x

R/W-x

R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC

UOWN

DTS

PID3

PID2

PID1

PID0

BC9

BC8

bit 15

bit 8

R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC R/W-x, HSC

BC7

BC6

BC5

BC4

BC3

BC2

BC1

BC0

bit 7

bit 0

HSC = Hardware Settable/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

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

bit 14

DTS: Data Toggle Packet bit

1

 = Data 1 packet

0

 = Data 0 packet

bit 13-10

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.

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.