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Section 21 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Bit
Bit Name
18
RFF2
17
RFF1
16
RFF0
15 to 3
2
RFD2
1
RFD1
0
RFD0
Rev. 1.00 Mar. 12, 2008 Page 814 of 1178
REJ09B0403-0100
Initial
value
R/W
Description
1
R/W
Receive Frame Number Flow Control Threshold
1
R/W
000: When 2 receive frame has been stored in the
1
R/W
001: When 4 receive frames have been stored in the
110: When 14 receive frames have been stored in the
111: When 16 receive frames have been stored in the
All 0
Reserved
These bits are always read as 0. The initial value
should not be changed.
1
R
Receive Byte Flow Control Threshold
000: When (256 − 32) bytes of data is stored in the
1
R
1
R
001: When (512 − 32) bytes of data is stored in the
110: When (1792 − 32) bytes of data is stored in the
001: When (2048 − 64) bytes of data is stored in the
receive FIFO
receive FIFO
:
:
receive FIFO
receive FIFO
receive FIFO
receive FIFO
:
:
receive FIFO
receive FIFO
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