EP2SGX60EF1152C3N Altera, EP2SGX60EF1152C3N Datasheet - Page 289

• Manufacturer Part Number: EP2SGX60EF1152C3N
• Description: IC STRATIX II GX 60K 1152-FBGA
• Manufacturer: Altera
• Series: Stratix® II GXr

Specifications of EP2SGX60EF1152C3N

• Number Of Logic Elements/cells: 60440
• Number Of Labs/clbs: 3022
• Total Ram Bits: 2544192
• Number Of I /o: 534
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 1152-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -
• Other names: 544-2181

Figure 4–12. DCD Measurement Technique for Non-DDIO (Single-Data Rate) Outputs
Figure 4–13. DCD Measurement Technique for DDIO (Double-Data Rate) Outputs
However, when the output is a double data rate input/output (DDIO)
signal, both edges of the input clock signal (positive and negative) trigger
output transitions
clock and the input clock buffer affect the output DCD.
When an FPGA PLL generates the internal clock, the PLL output clocks
the IOE block. As the PLL only monitors the positive edge of the reference
clock input and internally re-creates the output clock signal, any DCD
present on the reference clock is filtered out. Therefore, the DCD for a
DDIO output with PLL in the clock path is better than the DCD for a
DDIO output without PLL in the clock path.
(Figure
4–13). Therefore, any distortion on the input