TIDUF94 October   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 DP83TC818S-Q1 (Automotive SPE PHY)
      2. 2.3.2 TPS7B8233-Q1 (3.3V Vsleep Ultra-Low-IQ Low-Dropout Regulator)
      3. 2.3.3 TPS74701-Q1 (1.0V Rail Low-Dropout Regulator)
      4. 2.3.4 CDC6CE025000-Q1 (BAW Oscillator)
      5. 2.3.5 TPS4H160-Q1 (High-Side Switch)
  9. 3System Design Theory
    1. 3.1 Ethernet PHY
      1. 3.1.1 Ethernet PHY Power Supply
      2. 3.1.2 Ethernet PHY Clock Source
    2. 3.2 Power Coupling Network
      1. 3.2.1 High-Side Switch
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

4.4 Test Results

The following code block is captured from the Jacinto 7 EVM. With the 100 Mbits/sec connection, observe that 114 MBytes (112 MBytes) of data successfully transferred and the bandwidth is very close to the advertised speed of the network port (100 Mbit/sec). On the 1000 Mbit/sec setup, observe that 1.10 GBytes of data successfully transferred and the bandwidth is very close to the advertised speed of the network port (1000 Mbit/sec).

The following code block shows the 100Mbit/sec connection:

root@j721e-evm:~# iperf3 -c 192.168.1.1
Connecting to host 192.168.1.1, port 5201
[  5] local 192.168.1.237 port 32836 connected to 192.168.1.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  12.6 MBytes   106 Mbits/sec    0    249 KBytes
[  5]   1.00-2.00   sec  10.9 MBytes  91.7 Mbits/sec    0    249 KBytes
[  5]   2.00-3.00   sec  11.4 MBytes  95.9 Mbits/sec    0    249 KBytes
[  5]   3.00-4.00   sec  10.9 MBytes  91.7 Mbits/sec    0    249 KBytes
[  5]   4.00-5.00   sec  11.4 MBytes  95.9 Mbits/sec    0    249 KBytes
[  5]   5.00-6.00   sec  11.4 MBytes  95.9 Mbits/sec    0    249 KBytes
[  5]   6.00-7.00   sec  10.9 MBytes  91.7 Mbits/sec    0    249 KBytes
[  5]   7.00-8.00   sec  11.4 MBytes  95.9 Mbits/sec    0    249 KBytes
[  5]   8.00-9.00   sec  10.9 MBytes  91.7 Mbits/sec    0    249 KBytes
[  5]   9.00-10.00  sec  11.4 MBytes  95.9 Mbits/sec    0    249 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   114 MBytes  95.2 Mbits/sec    0             sender
[  5]   0.00-10.05  sec   112 MBytes  93.8 Mbits/sec                  receiver
iperf Done.

The following code block shows the 1000Mbit/sec connection:

root@j721e-evm:~# iperf3 -c 192.168.1.1
Connecting to host 192.168.1.1, port 5201
[  5] local 192.168.1.81 port 52240 connected to 192.168.1.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   114 MBytes   957 Mbits/sec    0    362 KBytes       
[  5]   1.00-2.00   sec   112 MBytes   936 Mbits/sec   10    365 KBytes       
[  5]   2.00-3.00   sec   112 MBytes   944 Mbits/sec   10    369 KBytes       
[  5]   3.00-4.00   sec   112 MBytes   942 Mbits/sec   20    342 KBytes       
[  5]   4.00-5.00   sec   112 MBytes   943 Mbits/sec   10    366 KBytes       
[  5]   5.00-6.00   sec   113 MBytes   945 Mbits/sec   20    315 KBytes       
[  5]   6.00-7.00   sec   112 MBytes   940 Mbits/sec   10    363 KBytes       
[  5]   7.00-8.00   sec   112 MBytes   938 Mbits/sec   20    264 KBytes       
[  5]   8.00-9.00   sec   113 MBytes   947 Mbits/sec   10    346 KBytes       
[  5]   9.00-10.00  sec   112 MBytes   936 Mbits/sec   10    368 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.10 GBytes   943 Mbits/sec  120             sender
[  5]   0.00-10.04  sec  1.10 GBytes   938 Mbits/sec                  receiver
iperf Done.