Datasheet

PIC18F2455/2550/4455/4550

U-0 R-x R-x R-x R-x R-x R-x U-0

— ENDP3 ENDP2 ENDP1 ENDP0 DIR PPBI

(1)

—

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 7 Unimplemented: Read as ‘0’

bit 6-3 ENDP3:ENDP0: Encoded Number of Last Endpoint Activity bits

(represents the number of the BDT updated by the last USB transfer)

1111 = Endpoint 15

1110 = Endpoint 14

....

0001 = Endpoint 1

0000 = Endpoint 0

bit 2 DIR: Last BD Direction Indicator bit

1 = The last transaction was an IN token

0 = The last transaction was an OUT or SETUP token

bit 1 PPBI: Ping-Pong BD Pointer Indicator bit

(1)

1 = The last transaction was to the Odd BD bank

0 = The last transaction was to the Even BD bank

bit 0 Unimplemented: Read as ‘0’

Note 1: This bit is only valid for endpoints with available Even and Odd BD registers.