Technical information

EZ-USB FX2 Technical Reference Manual
Page 15-76 EZ-USB FX2 Technical Reference Manual v2.1
15.11.12 Endpoint 8 Control and Status
Figure 15-82. Endpoint 8 Control and Status
Bit 5-4 NPAK1:0 Number of Packets in FIFO
The number of packets in the FIFO. 0-2 Packets.
Bit 3 FULL Endpoint FIFO Full
This bit is set to “1” to indicate that the Endpoint FIFO is full.
Bit 2 EMPTY Endpoint FIFO Empty
This bit is set to “1” to indicate that the Endpoint FIFO is empty.
Bit 0 STALL ENDPOINT STALL
Set this bit to “1” to
stall
an endpoint, and to “0” to clear a stall.
When the stall bit is “1,” the USB core returns a STALL handshake for all requests to the end-
point. This notifies the host that something unexpected has happened.
EP8CS Endpoint 8 Control and Status E6A6
b7 b6 b5 b4 b3 b2 b1 b0
0 0 NPAK1 NPAK0 FULL EMPTY 0 STALL
R R R R R R R R/W
0 0 0 0 0 1 0 0