EP4CE55F23C8N Altera, EP4CE55F23C8N Datasheet - Page 102

• Manufacturer Part Number: EP4CE55F23C8N
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C8N

• 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
• Family Name: Cyclone IV
• Number Of Logic Blocks/elements: 55856
• # I/os (max): 324
• Logic Cells: 55856
• Ram Bits: 2396160
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 484
• Package Type: FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -
• Lead Free Status / Rohs Status: 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