EP4CGX75DF27C7N Altera, EP4CGX75DF27C7N Datasheet - Page 102

• Manufacturer Part Number: EP4CGX75DF27C7N
• Description: Cyclone IV GX
• Manufacturer: Altera
• Series: CYCLONE® IV GXr

Specifications of EP4CGX75DF27C7N

• Number Of Logic Elements/cells: 73920
• Number Of Labs/clbs: 4620
• Total Ram Bits: 4257792
• Number Of I /o: 310
• Number Of Gates: -
• Voltage - Supply: 1.16 V ~ 1.24 V
• Mounting Type: *
• Operating Temperature: 0°C ~ 85°C
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5–40
Cyclone IV Device Handbook, Volume 1
Table 5–9. Loop Filter Resistor Value Control (Part 2 of 2)
Table 5–10. Loop Filter Control of High Frequency Capacitor
Bypassing a PLL Counter
Bypassing a PLL counter results in a divide (N, C0 to C4 counters) factor of one.
Table 5–11
Table 5–11. PLL Counter Settings
To bypass any of the PLL counters, set the bypass bit to 1. The values on the other bits
are then ignored.
Note to
(1) Bypass bit.
X
X
LFR[4]
1
1
1
1
Table
X
X
lists the settings for bypassing the counters in PLLs of Cyclone IV devices.
PLL Scan Chain Bits [0..8] Settings
LFC[1]
5–11:
X
X
0
0
1
LFR[3]
X
X
1
1
1
1
LSB
X
X
X
X
LFR[2]
0
0
1
1
X
X
LFC[0]
X
X
Chapter 5: Clock Networks and PLLs in Cyclone IV Devices
0
1
1
LFR[1]
1
0
MSB
(1)
(1)
0
1
0
1
PLL counter bypassed
PLL counter not bypassed
© December 2010 Altera Corporation
LFR[0]
0
1
0
0
Setting (Decimal)
Description
0
1
3
PLL Reconfiguration
(Decimal)
Setting
24
27
28
30