EP4CE55F23C7 Altera, EP4CE55F23C7 Datasheet - Page 102

• Manufacturer Part Number: EP4CE55F23C7
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C7

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 324
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

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