Ethernet PowerLink Hardware and Software
Servo Drives
Software
Useful Components
- Processors with IEEE-1588 hardware support
- Hubs or switches in hub mode
- Most switches use store and forward, and thus introduce variable latency if EPL devices are daisy changed together
- Need 100BaseT support (some hub chips are 10BaseT)
- Hub chips are currently hard to find
- The main one I found was the HBLXT9863 ($16.66 100u)
- Other part numbers I looked at included the PMC Sierra PM8385-NI, BCM5012R, LXT970, LXT9863, LXT9880, TC6097P, IMR-100M, PM83850, HBLXT914, HBLXT9860, DP83850
- SMSC's LAN931x series would be interesting if they supported a low latency "hub mode"
- Micrel has some switches (3 port, with 16/32-bit or MII interface) that support a "hub mode"
- For the KSZ8893 and KSZ8842, Micrel claims max latency of 310 nsec with ±40 nsec jitter port to port
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