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Field
Name
R/W
Description
8
LDES
R/W
Last Descriptor
When this bit is set, the buffer pointed to by the descriptor is the
last buffer of the frame.
9
FDES
R/W
First Descriptor
When this bit is set, the descriptor contains the first buffer of the
frame. If the size of the first buffer is 0, the second buffer contains
the beginning of the frame. If the size of the second buffer is also 0,
the next descriptor contains the beginning of the frame.
10
VLANF
R/W
VLAN Frame
When this bit is set, the frame referred to by this descriptor is a
VLAN frame with MAC tag.
11
OFERR
R/W
Overflow Error
When this bit is set, the received frame is damaged due to buffer
overflow in Rx FIFO.
12
LERR
R/W
Length Error
When this bit is set, the actual length of the received frame does
not match the length/type field. This bit is valid only when
RXDES0[5]=0.
13
SADDRF
R/W
Source Address Filter Fail
When this bit is set, the SA field of the frame does not pass the SA
filter in the MAC.
14
DESERR
R/W
Descriptor Error
When this bit is set, it indicates that the frame is truncated because
the frame is not suitable for the current descriptor buffer, and DMA
has no next descriptor. The frame is truncated.
Note: This field is valid only when the last descriptor (RXDES0[8])
is set.
15
ERRS
R/W
Error Summary
The value is OR operation result of the following bits:
RXDES0[0]
：
PERR_ESA
RXDES0[1]
：
CERR
RXDES0[3]
：
RERR
RXDES0[4]
：
RXWDTTO
RXDES0[6]
：
LC
RXDES0[7]
：
IPCERR_TSV
RXDES0[11]
：
OFERR
RXDES0[14]
：
DESERR
29:16
FL
R/W
Frame Length
This bit field indicates the byte length of the received frame
transmitted to the host memory. This bit is valid only only when
RXDES0[8]=1 and RXDES0[14])=0.
When RXDES0[8]=0 and ERRS=0, it indicates the cumulative
number of bytes that have been transmitted to the current frame.
30
ADDRF
R/W
Destination Address Filter Fail
When this bit is set, it indicates the frame that fails DA filtering in
MAC.
