EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 209

• Manufacturer Part Number: EP3SE50F780I3N
• Description: Stratix III
• Manufacturer: Altera

Altera Corporation
November 2007
Table 6–18. loop_filter_r Bit Settings
LFR[4]
0
0
0
0
1
1
1
1
1
1
1
LFR[3]
0
0
0
1
0
0
0
1
1
1
1
Charge Pump and Loop Filter
You can reconfigure the charge-pump and loop-filter settings to update
the PLL bandwidth in real time.
possible settings for charge pump current (I
and capacitor (C) values for Stratix III PLLs.
Table 6–17. charge_pump_current Bit Settings
CP[2]
0
0
0
1
LFR[2]
0
0
1
0
0
0
1
0
0
1
1
CP[1]
0
0
1
1
LFR[1]
Clock Networks and PLLs in Stratix III Devices
0
1
0
0
0
1
0
0
1
0
1
Tables
Stratix III Device Handbook, Volume 1
6–17, 6–18, and
CP[0]
LFR[0]
cp
0
1
1
1
), loop-filter resistor (R),
0
1
0
0
0
1
0
0
1
0
0
6–19
Decimal Value
Decimal Value
for Setting
for Setting
show the
16
19
20
24
27
28
30
0
3
4
8
0
3
7
1
6–59