Altera cyclone V Technical Reference page 2472

18-382
dctl
dctl Fields
Bit
16
nakonbble
15
ignrfrmnum
Altera Corporation
Name
Set NAK automatically on babble (NakOnBble)​. The
core sets NAK automatically for the endpoint on
which babble is received.
Value
0x0
0x1
Do NOT program IgnrFrmNum bit to 1'b1 when the
core is operating in threshold mode. When Scatter/
Gather DMA mode is enabled this feature is not
applicable to High Speed, High bandwidth transfers.
When this bit is enabled, there must be only one
packet per descriptor. In Scatter/Gather DMA mode,
if this bit is enabled, the packets are not flushed when
a ISOC IN token is received for an elapsed frame.
When Scatter/Gather DMA mode is disabled, this
field is used by the application to enable periodic
transfer interrupt. The application can program
periodic endpoint transfers for multiple (micro)
frames. 0: periodic transfer interrupt feature is
disabled, application needs to program transfers for
periodic endpoints every (micro)frame 1: periodic
transfer interrupt feature is enabled, application can
program transfers for multiple (micro)frames for
periodic endpoints. In non Scatter/Gather DMA
mode the application will receive transfer complete
interrupt after transfers for multiple (micro)frames
are completed.
Value
0x0
0x1
Description
Description
Disable NAK on Babble Error
NAK on Babble Error
Description
The core transmits the packets only in the
frame number in which they are intended to
be transmitted
The core ignores the frame number, sending
packets immediately as the packets are ready
cv_5v4
2016.10.28
Access Reset
RW 0x0
RW 0x0
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