From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
To: Libre-RISCV General Development <libre-riscv-dev@lists.libre-riscv.org>
Subject: Re: [libre-riscv-dev] daily kan-ban update 08mar2020
Date: Fri, 8 May 2020 23:45:26 +0100
Message-ID: <CAPweEDxmo_mN2MR902ze27yfRmHQawoDdFA_saFNxz069UABcA@mail.gmail.com> (raw)
In-Reply-To: <CAC2bXD62Q1TOCooXhJ-VsvJTgY4+adnchjoqe9jFtK+r9qRTeQ@mail.gmail.com>
On Fri, May 8, 2020 at 10:39 PM Jacob Lifshay <programmerjake@gmail.com> wrote:
>
> On Fri, May 8, 2020, 13:27 Yehowshua <yimmanuel3@gatech.edu> wrote:
>
> > Litex also support ethernet which would require a $20 PHY, not great for a
> > low cost SBC.
>
>
> There are some inexpensive GbE PHYs using the GMII interface (what I think
> is what we are planning on using),
RGMII. GMII is 8-bit TX, 8-bit RX (so around 26 pins total) where
RGMII is DDR and half the TX and RX pins. you can see here
https://libre-soc.org/shakti/m_class/pinouts/
> mouser sells some for less than $2 each:
> https://www.mouser.com/ProductDetail/Intel/PEF7072HLV16-S-LLHN?qs=d5w0Orft5TofEDXuIkwIvA==
which means in China it's well under $1
RT8192.
an alternative is an MCU Bus (AT/XT/ISA) and to use the DM9000.
https://libre-soc.org/shakti/m_class/peripheralschematics/
l.
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Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 10:56 Luke Kenneth Casson Leighton
2020-05-08 10:59 ` Luke Kenneth Casson Leighton
2020-05-08 13:51 ` Yehowshua
2020-05-08 15:16 ` Luke Kenneth Casson Leighton
2020-05-08 17:25 ` Staf Verhaegen
2020-05-08 22:23 ` Luke Kenneth Casson Leighton
2020-05-08 13:28 ` Michael Nolan
2020-05-08 14:03 ` Michael N
2020-05-08 15:25 ` Luke Kenneth Casson Leighton
2020-05-08 20:47 ` Michael Nolan
2020-05-08 22:48 ` Luke Kenneth Casson Leighton
2020-05-08 15:10 ` Luke Kenneth Casson Leighton
2020-05-08 15:21 ` Michael Nolan
2020-05-08 15:27 ` Luke Kenneth Casson Leighton
2020-05-08 20:27 ` Yehowshua
2020-05-08 21:39 ` Jacob Lifshay
2020-05-08 22:34 ` [libre-riscv-dev] daily kan-ban update 08may2020 Jacob Lifshay
2020-05-08 23:09 ` Luke Kenneth Casson Leighton
2020-05-09 0:31 ` Yehowshua
2020-05-09 8:25 ` Luke Kenneth Casson Leighton
2020-05-09 14:33 ` Yehowshua
2020-05-08 22:45 ` Luke Kenneth Casson Leighton [this message]
2020-05-08 22:41 ` [libre-riscv-dev] daily kan-ban update 08mar2020 Luke Kenneth Casson Leighton
2020-05-08 20:38 Alain D D Williams
2020-05-08 20:47 ` Luke Kenneth Casson Leighton
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