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X220 WiFi Card Pin 51

X200, X201, X220 (including equivalent tablet models) and X300, X301 series specific matters only.
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JPOESQ
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X220 WiFi Card Pin 51

#1 Post by JPOESQ » Sat Feb 01, 2020 6:51 pm

I decided to upgrade my X220 with modded bios and an AC7260 combo card. After installing the 7260, I disabled the BT daughter card that was already in the X220. Everything is working as it should.

I didn’t tape over pin 51, which is what all of the posts seem to say is required for the card to work. Mine works without the tape. It’s a NOS Intel card with no modifications.

What does taping over pin 51 do, and why does my card work without the tape?
John P. O'Banion, JD, PE, BSEE
Registered Patent Attorney
http://www.intellectual.com

600, X220 (McDonnell bios, Linux), X230, T530 (1vyrain bios), X1 Carbon 5th Signature Edition

ThreeIguanasPerSecond
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Re: X220 WiFi Card Pin 51

#2 Post by ThreeIguanasPerSecond » Tue Feb 04, 2020 1:00 pm

it activates the built-in Bluetooth functionality of the 7260-AC WLAN card, that's what it does. normally pin 51 (W_DISABLE2# or RESERVED) shouldn't be used according to the MiniPCIe specifications.

your X220 originally came with a Bluetooth daughter card installed, right? if it did, that's the reason why your 7260-AC WLAN card worked without requiring pin 51 to be taped.
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JPOESQ
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Re: X220 WiFi Card Pin 51

#3 Post by JPOESQ » Tue Feb 04, 2020 4:57 pm

Yes indeed. My X220 came with BT so that makes sense about pin 51. Thank you.
John P. O'Banion, JD, PE, BSEE
Registered Patent Attorney
http://www.intellectual.com

600, X220 (McDonnell bios, Linux), X230, T530 (1vyrain bios), X1 Carbon 5th Signature Edition

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