Altera Triple Speed Ethernet MegaCore Function - Manual (Page 176)

• Device under test (DUT)—Your custom MegaCore function variation
• Avalon-ST Ethernet frame generator—Simulates a user application connected to the MAC system-side
interface. It generates frames on the Avalon-ST transmit interface.
• Avalon-ST Ethernet frame monitor—Simulates a user application receiving frames from the MAC system-
side interface. It monitors the Avalon-ST receive interface and decodes all data received.
• MII/RGMII/GMII Ethernet frame generator—Simulates a MAC function that sends frames to the PCS
function.
• MII/RGMII/GMII Ethernet frame monitor—Simulates a MAC function that receives frames from the
PCS function and decodes them.
• MDIO slaves—Simulates a PHY management interface. It responds to an MDIO master transactor.
• Clock and reset generator.
Table 10-1: Testbench Components
Frame Monitor Frame Generator Ethernet-Side
Interface
System-Side
Interface
Configuration
Avalon-ST Frame
Monitor Avalon-ST Frame
Generator GMII/MII/
RGMII Avalon-ST MAC only
Avalon-ST Frame
Monitor Avalon-ST Frame
Generator TBI Avalon-ST MAC with PCS
Avalon-ST Frame
Monitor Avalon-ST Frame
Generator 1.25 Gbps Avalon-ST MAC with PCS and
embedded PMA
GMII/MII Frame
Monitor GMII/MII Frame
Generator TBI GMII/MII PCS only
GMII/MII Frame
Monitor GMII/MII Frame
Generator 1.25 Gbps GMII/MII PCS with embedded
PMA
Testbench Verification
The testbench is self-checking and determines the success of a simulation by verifying the frames received.
It also checks for any errors detected by the frame monitors. The testbench does not verify the IEEE statistics
generated by the MAC layer. Simulation fails only if the testbench is not able to detect deliberately inserted
errors. At the end of a simulation, the testbench displays messages in the simulator console indicating its
results.
The testbench verifies the following functionality:
• Transmit and receive datapaths are functionally correct.
• Ethernet frames generated by the frame generator are received by the frame monitor.
• Additional checks for configurations that contain the MAC function:
• Correct CRC-32 is inserted.
• Short frames are padded up to at least 64 bytes in length.
• Untagged received frames of size greater than the maximum frame length are truncated to the maximum
frame length with additional bytes up to 12.
• CRC-32 is optionally discarded before the frames are received by the traffic monitor.
Testbench Altera Corporation
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Testbench Verification 10-2
2014.06.30