DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 763

• Manufacturer Part Number: DK-DEV-4SGX230N
• Description: KIT DEVELOPMENT STRATIX IV
• Manufacturer: Altera
• Series: Stratix® IVr
• Type: FPGAr

Specifications of DK-DEV-4SGX230N

• Contents: Development Board, Universal Power Supply, Cables and Software
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Stratix
• Silicon Core Number: EP4S
• Silicon Family Name: Stratix IV GX
• Rohs Compliant: Yes
• For Use With/related Products: EP4SGX230K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2594

Chapter 3: Configuring Multiple Protocols and Data Rates in Stratix IV Devices
Sharing CMU PLLs
Table 3–4. Configuration for Example 2
February 2011 Altera Corporation
Instance Name
User-Created
inst0
inst1
inst2
1
Number of Channels
Figure 3–2
channel instances.
Figure 3–2. Combined Instances after Compilation for Example 1
Example 2
Consider the example design listed in
the same serial data rate but with different CMU PLL data rates, the Quartus II
software creates a separate CMU PLL for the two instances.
Even though the effective data rate of inst1 is 2.5 Gbps (5 Gbps/2 = 2.5 Gbps), the
same as inst0, when you compile the design, the Quartus II software requires two
CMU PLLs to provide clocks for the transmitter side of the two instances because
their base data rates are different. In this example, you have the third instance, inst2,
that requires a third CMU PLL. Therefore, the Quartus II software cannot combine the
above three instances within the same transceiver block.
1
1
1
shows the scenario after the Quartus II software combines the transceiver
ALTGX MegaWizard Plug-In Manager Settings
Configuration
Receiver and
Receiver and
Receiver and
Transmitter
Transmitter
Transmitter
Effective Data Rate: 1.0625 Gbps
Inst 0
Effective Data Rate: 4.25 Gbps
Inst 1
Effective Data Rate: 2.125 Gbps
Inst 2
Inst 3
Effective Data Rate: 4.25 Gbps
TX Loc Div: /1
TX Loc Div: /1
TX Loc Div: /2
TX Loc Div: /4
Transceiver Block
Table
Effective Data Rate (Gbps)
Base Data Rate:
4.25 Gbps
CMU PLL
3–4. When you have two instances with
2.5
2.5
Stratix IV Device Handbook Volume 2: Transceivers
1
Base Data Rate (Gbps)
2.5
5
1
3–9