Lattice Semiconductor CertusPro-NX - Page 163

CertusPro-NX SerDes/PCS Usage Guide
Preliminary Technical Note
FPGA-TN-02245-0.81 © 2020-2021 Lattice Semiconductor 163
All rights reserved. CONFIDENTIAL
Bit Rate
(Gbps)
Reference Clock
(MHz)
M
F
N
F
VCO
(MHz)
F
bit
(MHz)
F
PMA
(MHz)
Note
125
4
1
20
10000
2500
125
—
156.25
4
1
16
10000
2500
156.25
PMA Only
156.25
4
2
8
10000
2500
312.5
PMA Only
2.7
84.375
1
4
2
16
5400
2700
168.75
PMA Only
84.375
1
4
4
8
5400
2700
337.5
PMA Only
90
4
3
10
5400
2700
270
—
108
2
5
5
5400
2700
540
Risk for 540MHz F
PMA
112.5
2
3
8
5400
2700
337.5
PMA Only
135
2
1
20
5400
2700
135
—
135
2
2
10
5400
2700
270
—
2.97
74.25
2
2
20
5940
2970
148.5
—
74.25
2
4
10
5940
2970
297
—
92.8125
1
2
2
16
5940
2970
185.625
PMA Only
92.8125
1
2
4
8
5940
2970
371.25
PMA Only
99
2
3
10
5940
2970
297
—
123.75
1
2
3
8
5940
2970
371.25
PMA Only
148.5
2
1
20
5940
2970
148.5
—
148.5
2
2
10
5940
2970
297
—
3
75
2
4
10
6000
3000
300
—
75
2
2
20
6000
3000
150
—
93.75
2
2
16
600
300
187.5
PMA Only
93.75
2
4
8
600
300
375
PMA Only
100
2
3
10
6000
3000
300
—
125
2
3
8
6000
3000
375
PMA Only
150
2
2
10
6000
3000
300
—
150
2
1
20
6000
3000
150
—
3.072
76.8
2
4
10
6144
3072
230.4
—
76.8
2
2
20
6144
3072
153.6
—
96
2
2
16
6144
3072
192
PMA Only
96
2
4
8
6144
3072
384
PMA Only
102.4
2
3
10
6144
3072
307.2
—
128
2
3
8
6144
3072
384
PMA Only
153.6
2
1
20
6144
3072
153.6
—
153.6
2
2
10
6144
3072
307.2
—
3.125
78.125
2
4
10
6250
3125
312.5
—
78.125
2
2
20
6250
3125
156.25
—
97.65625
2
2
16
6250
3125
195.3125
PMA Only
97.65625
2
4
8
6250
3125
390.625
PMA Only
104.166
2
3
10
6250
3125
312.5
—
130.2083
1
2
3
8
6250
3125
390.625
PMA Only
156.25
2
1
20
6250
3125
156.25
—
156.25
2
2
10
6250
3125
312.5
—
3.75
75
2
5
10
7500
3750
375
—
78.125
2
3
16
7500
3750
234.375
PMA Only
78.125
2
6
8
7500
3750
468.75
PMA Only
93.75
2
4
10
7500
3750
375
—
93.75
2
2
20
7500
3750
187.5
—