Lattice Semiconductor CertusPro-NX - Page 165

CertusPro-NX SerDes/PCS Usage Guide
Preliminary Technical Note
FPGA-TN-02245-0.81 © 2020-2021 Lattice Semiconductor 165
All rights reserved. CONFIDENTIAL
Bit Rate
(Gbps)
Reference Clock
(MHz)
M
F
N
F
VCO
(MHz)
F
bit
(MHz)
F
PMA
(MHz)
Note
5.94
74.25
1
4
20
5940
5940
297
—
74.25
1
5
16
5940
5940
371.25
PMA Only
92.8125
1
1
4
16
5940
5940
371.25
PMA Only
99
1
3
20
5940
5940
297
—
123.75
1
1
3
16
5940
5940
371.25
PMA Only
148.5
1
2
20
5940
5940
297
—
6
75
1
4
20
6000
6000
300
—
75
1
5
16
6000
6000
375
PMA Only
93.75
1
4
16
6000
6000
375
PMA Only
100
1
3
20
6000
6000
300
—
125
1
3
16
6000
6000
375
PMA Only
150
1
2
20
6000
6000
300
—
6.144
76.8
1
4
20
6144
6144
307.2
—
76.8
1
5
16
6144
6144
384
PMA Only
96
1
4
16
6144
6144
384
PMA Only
102.4
1
3
20
6144
6144
307.2
—
128
1
3
16
6144
6144
384
PMA Only
153.6
1
2
20
6144
6144
307.2
—
6.25
78.125
1
4
20
6250
6250
312.5
—
78.125
1
5
16
6250
6250
390.625
PMA Only
97.65625
1
1
4
16
6250
6250
390.625
PMA Only
104.166
1
3
20
6250
6250
312.5
—
130.2083
1
1
3
16
6250
6250
390.625
PMA Only
156.25
1
2
20
6250
6250
312.5
—
6.375
79.6875
1
4
20
6375
6375
318.75
—
79.6875
1
5
16
6375
6375
398.4375
PMA Only
99.609375
1
1
4
16
6375
6375
398.4375
PMA Only
106.25
1
3
20
6375
6375
318.75
—
132.8125
1
3
16
6375
6375
398.4375
PMA Only
159.375
1
2
20
6375
6375
318.75
—
6.75
84.375
1
1
4
20
6750
6750
337.5
—
84.375
1
1
5
16
6750
6750
421.875
PMA Only
105.46875
1
1
4
16
6750
6750
421.875
PMA Only
112.5
1
3
20
6750
6750
337.5
—
140.625
1
3
16
6750
6750
421.875
PMA Only
8
80
1
5
20
8000
8000
400
—
83.333
1
6
16
8000
8000
500
PCIe Gen3 or PMA Only
100
1
4
20
8000
8000
400
—
100
1
5
16
8000
8000
500
PCIe Gen3 or PMA Only
125
1
4
16
8000
8000
500
PCIe Gen3 or PMA Only
133.333
1
3
20
8000
8000
400
—
8.1
81
1
5
20
8100
8100
405
—
101.25
1
1
4
20
8100
8100
405
—
135
1
3
20
8100
8100
405
—
10.3125
161.1328125
1
4
16
10312.5
10312.5
644.53
For 64B/66B PCS
Note:
This crystal may not be available.