On Mon, Jul 12, 2021 at 02:33:58PM +0100, Russell King (Oracle) wrote: > On Mon, Jul 12, 2021 at 04:06:24PM +0300, alexandru.tachici@xxxxxxxxxx wrote: > > From: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> > > > > The ADIN1100 is a low power single port 10BASE-T1L transceiver designed for > > industrial Ethernet applications and is compliant with the IEEE 802.3cg > > Ethernet standard for long reach 10 Mb/s Single Pair Ethernet. > > > > Ethtool output: > > Settings for eth1: > > Supported ports: [ TP MII ] > > Supported link modes: 10baseT1L/Full > > 2400mv > > 1000mv > > The SI unit of voltage is V not v, so milli-volts is mV not mv. Surely, > at the very least, we should be using the SI designation in user > visible strings? > > It may also be worth providing a brief description of 10BASE-T1L in the > cover letter so (e.g.) one doesn't have to look up the fact that the > voltage level is negotiated via bit 13 of the base page. I've found > that by searching google and finding dp83td510e.pdf I'm curios how the voltage should be actually chosen? In the adin1100 datasheet i read: "The 1.0 V pk-pk operating mode, external termination resistors and independent Rx/Tx pins make the ADIN1100 suited to intrinsic safety applications" "For long reach/trunk applications the higher transmit amplitude of 2.4 V pk-pk" So, it seems to depends on: - do we have safety requirements? - how long is the cable? Can we use 2.4V any time if it is available or it is bad idea for short cables? Regards, Oleksij -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
