Pinout for M2. M-key and E-key for LattePanda Alpha

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zamin
Posts: 2
Joined: Thu Nov 29, 2018 8:22 pm

Thu Nov 29, 2018 8:28 pm

Dear LattePanda

Just received the awesome Alphas! Great product! Wonder if it is possible for your team to share the pinout for the M.2 both M-key and
E-key connectors? Also want to confirm that there are PCI-e x2 on the E-key.

Thanks,
-Xueming

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ccs_hello
Posts: 374
Joined: Sat Oct 13, 2018 9:16 pm

Fri Nov 30, 2018 5:57 am

First of all, the "full-featured" NGFF M.2 type-M pinout and type-E pinout are available over the Internet.

On Alpha's type-M, LP Alpha's user manual stated it supports PCIe (all 4 lanes) and SATA <-- these two are either-or.
(NVMe uses PCIe bus.)

I have tested PCIe x4, NVMe x4, NVMe x2, NVMe x1, and SATA. They all works. (So the pins related to PCIe x4 and SATA are present.)

On Alpha's type-E, LP Alpha's user manual stated it supports PCIe (max 2 lanes), USB 2.0, and UART.
In this case, I have only tested PCIe 1x use case. I might be able to test the other two interfaces soon.
I need to improvise a way to test PCIe 2x bus, but at a later time.

ccs_hello

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zamin
Posts: 2
Joined: Thu Nov 29, 2018 8:22 pm

Fri Nov 30, 2018 4:12 pm

ccs_hello - Thanks for your reply. This is exactly what I want to verify - if PCIe x2 are implemented on the E-key

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ccs_hello
Posts: 374
Joined: Sat Oct 13, 2018 9:16 pm

Fri Nov 30, 2018 11:45 pm

I forgot that key-E also has a PCM port (not tested).

BTW, some info on Win10 mapping:
https://www.lattepanda.com/topic-f6t16906.html

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miroky
Posts: 1
Joined: Sat Apr 20, 2019 10:50 am

Sat Apr 20, 2019 11:02 am

ccs_hello wrote:
Fri Nov 30, 2018 11:45 pm
I forgot that key-E also has a PCM port (not tested).

BTW, some info on Win10 mapping:
https://www.lattepanda.com/topic-f6t16906.html
I am doing some research on the e-key of LP864.
It seems the pin layout can be found in http://pinoutguide.com/HD/M.2_NGFF_conn ... nout.shtml . But the e-key description has a little difference from https://www.atpinc.com/blog/what-is-m.2 ... y-socket-3 in which states e-key has "2x PCIex1" instead of "PCIex2". This makes me confused.

Nevermind, I am working on an adaptor to expose USB and UART(to Pins), PCIe(to ribbon cable). After that we can see what has we got, I think?

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