NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 622 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
EMAC n FIFO Threshold Control Register (EMACn_FFTCR)
The EMACn_FFTCR defines the high and low threshold of internal FIFOs, including TXFIFO and
RXFIFO. The threshold of internal FIFOs is related to EMAC request generation and when the
frame transmission starts. The EMACn_FFTCR also defines the burst length of AHB bus cycle for
system memory access.
Register
Offset
R/W
Description
Reset Value
EMACn_FFTCR
n=0,1
E0x09
C
R/W
EMAC n FIFO Threshold Control Register
0x0000_0101
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
BURSTLEN
Reserved
15
14
13
12
11
10
9
8
Reserved
TXTHD
7
6
5
4
3
2
1
0
Reserved
RXTHD
Bits
Description
[31:22]
Reserved
Reserved.
[21:20]
BURSTLEN
DMA Burst Length
This defines the burst length of AHB bus cycle while EMAC accesses system memory.
00 = 16 words.
01 = 16 words.
10 = 8 words.
11 = 4 words.
[19:10]
Reserved
Reserved.