Owners manual

Interfaces
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 578
31
R/W
0
RX_DMA_START
When set, the RX DMA will go no to work. It is cleared internally and always
read a 0.
30
R/W
0
RX_DMA_EN
0: Stop RX DMA after finish receiving current frame
1: Start and run RX DMA
29:25
/
/
/
24
R/W
0
RX_FIFO_FLOW_CTL
0: Disable RX flow control
1: Enable RX flow control based on RX_FLOW_CTL_TH_DEACT and
RX_FLOW_CTL_TH_ACT
23:22
R/W
0
RX_FLOW_CTL_TH_DEACT
The threshold for deactivating flow control in both half-duplex mode and
full-duplex mode
00: Full minus 1 KB
01: Full minus 2 KB
10: Full minus 3 KB
11: Full minus 4 KB
21:20
R/W
0
RX_FLOW_CTL_TH_ACT
The threshold for activating flow control in both half-duplex mode and
full-duplex mode.
00: Full minus 1 KB
01: Full minus 2 KB
10: Full minus 3 KB
11: Full minus 4 KB
19:6
/
/
/
5:4
R/W
0
RX_TH
The threshold value of RX DMA FIFO. When RX_MD is 0, RX DMA starts to
transfer data when the size of received frame in RX DMA FIFO is greater than
the threshold. In addition, full frames with a length less than the threshold
are transferred automatically.
00: 64
01: 32
10: 96
11: 128
3
R/W
0
RX_ERR_FRM
0: RX DMA drops frames with error
1: RX DMA forwards frames with error
2
R/W
0
RX_RUNT_FRM
When set, forward undersized frames with no error and length less than
64bytes
1
R/W
0
RX_MD
0: RX DMA reads data from RX DMA FIFO to host memory after the number
of data in RX DAM FIFO is greater than RX_TH
1: RX DMA reads data from RX DMA FIFO to host memory after a complete
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