
EZ-USB FX2 Technical Reference Manual
Page 15-38 EZ-USB FX2 Technical Reference Manual v2.1
Figure 15-32. Endpoint 2, 4, 6, 8/Slave FIFO Programmable Flag Low
Bit 7-0 PFC7:0 PF Threshold
This register contains the current packet bytes to be transferred when the EPxFIFOPFH regis-
ter requires data.
Bits 9:8 of the byte count are in bits 1:0 of EP2FIFOPFH/EP6FIFOPFH.
Bit 8 of the byte count is bit 0 of EP4FIFOPFH/EP8FIFOPFH.
EP2FIFOPFL
see Section 15.14
Endpoint 2/Slave FIFO Prog. Flag LOW E631
EP4FIFOPFL
see Section 15.14
Endpoint 4/Slave FIFO Prog. Flag LOW E633
EP6FIFOPFL
see Section 15.14
Endpoint 6/Slave FIFO Prog. Flag LOW E635
EP8FIFOPFL
see Section 15.14
Endpoint 8/Slave FIFO Prog. Flag LOW
[HIGH SPEED (480 Mbit/Sec) Mode and
FULL-SPEED (12 Mbit/Sec) Iso Mode]
E637
b7 b6 b5 b4 b3 b2 b1 b0
PFC7 PFC6 PFC5 PFC4 PFC3 PFC2 PFC1 PFC0
R/W R/W R/W R/W R/W R/W R/W R/W
0 0 0 0 0 0 0 0
EP2FIFOPFL
see Section 15.14
Endpoint 2/Slave FIFO Prog. Flag LOW E631
EP4FIFOPFL
see Section 15.14
Endpoint 4/Slave FIFO Prog. Flag LOW E633
EP6FIFOPFL
see Section 15.14
Endpoint 6/Slave FIFO Prog. Flag LOW E635
EP8FIFOPFL
see Section 15.14
Endpoint 8/Slave FIFO Prog. Flag LOW
[FULL SPEED (12 Mbit/Sec) Non-Iso Mode]
E637
b7 b6 b5 b4 b3 b2 b1 b0
IN: PKTS[1]
OUT:PFC7
IN: PKTS[0]
OUT:PFC6
PFC5 PFC4 PFC3 PFC2 PFC1 PFC0
R/W R/W R/W R/W R/W R/W R/W R/W
0 0 0 0 0 0 0 0
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