Owners manual

Interfaces
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 587
30
RX_DAF_FAIL
When set, current frame don’t pass DA filter.
29:16
RX_FRM_LEN
When LAST_DESC is not set and no error bit is set, this field is the length of received data for current
frame.
When LAST_DESC is set, RX_OVERFLOW_ERR and RX_NO_ENOUGH_BUF_ERR are not set, this field is
the length of receive frame.
15
Reserved
14
RX_NO_ENOUGH_BUF_ERR
When set, current frame is clipped because of no enough buffer.
13
RX_SAF_FAIL
When set, current fame don’t pass SA filter.
12
Reserved.
11
RX_OVERFLOW_ERR
When set, a buffer overflow error occurred and current frame is wrong.
10
Reserved
9
FIR_DESC
When set, current descriptor is the first descriptor for current frame.
8
LAST_DESC
When set, current descriptor is the last descriptor for current frame.
7
RX_HEADER_ERR
When set, the checksum of frame’s header is wrong.
6
RX_COL_ERR
When set, there is a late collision during reception in half-duplex mode.
5
Reserved.
4
RX_LENGTH_ERR
When set, the length of current frame is wrong.
3
RX_PHY_ERR
When set, the receive error signal from PHY is asserted during reception.
2
Reserved.
1
RX_CRC_ERR
When set, the CRC filed of received frame is wrong.
0
RX_PAYLOAD_ERR
When set, the checksum or length of received frame’s payload is wrong.
2nd Word of Receive Descriptor
Bits
Description
31
RX_INT_CTL
When set and a frame have been received, the RX_INT will not be set.
30:11
Reserved
10:0
BUF_SIZE
The size of buffer specified by current descriptor.
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