EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 143

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Altera Corporation-Preliminary
March 2007
Table 6–11. Loop Filter Resistor Value Control
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.
show the possible settings for charge pump (Icp) and loop filter resistor
(R) and capacitor (C) values for the Cyclone III PLLs.
Table 6–10. Charge Pump Bit Control
Table 6–12. Loop Filter Control of High Frequency Capacitor
CP[2]
0
1
1
1
LFC[1]
0
0
1
LFR[2]
0
0
1
0
0
0
1
0
0
1
1
CP[1]
0
0
1
1
LFR[1]
LFC[0]
0
1
0
0
0
1
0
0
1
0
1
0
1
1
Table
Cyclone III Device Handbook, Volume 1
CP[0]
0
0
0
1
6–10,
Table
LFR[0]
0
1
0
0
0
1
0
0
1
0
0
6–11, and
Setting (Decimal)
Setting (Decimal)
PLL Reconfiguration
0
1
3
0
1
3
7
(Decimal)
Table 6–12
Setting
16
19
20
24
27
28
30
0
3
4
8
6–43