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Implementing SW UART
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asmallri



Joined: 12 Aug 2004
Posts: 1658
Location: Perth, Australia

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PostPosted: Fri Sep 05, 2025 7:34 pm     Reply with quote
robleso7473 wrote:
Just in case you guys were interested. MikroE sells this DPQT UART MUX board using TI's SN74LV4052A Dual 4-Channel MUX: https://www.mikroe.com/uart-mux-click?srsltid=AfmBOopxik_tmTzFdzpON_lp_QDvc2ObCRFSJJZPx_K-xoG9yRQXYlPC. It's $8 at Digikey.

Going to order one of these to test out the idea.


This module will work. Personally, I use 10K pullups instead of 100K pullups for the TX and RX lines shown on the schematic of the module.
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robleso7473



Joined: 25 Mar 2009
Posts: 66

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PostPosted: Sun Sep 07, 2025 2:33 pm     Reply with quote
Thank you for the additional pointers, Asmallri.
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