Flow Control - UART from Scratch - Part 9

The UART PCB that’s been my main source of communication to the CPU had a cosmetic issue on the silk screen I’ve been wanting to fix for a while. For a while I’ve been planning on adding an extra pin to share the UART’s clock with the reset of the IO system, this kind of clock sharing was done as a cost saving on many systems as it saves me needing extra clock generation on the Snes Controller and Audio modules. Additionaly I’ve been thinking for a while that adding some support for RTS/CTS Flow Control would help the build out in a couple of different way. Time for a new PCB! PCB in this video made by the sponsor - Get JLCPCB 6-layer PCBs for just $5! Register to get $80 Coupons: https://jlcpcb.com/?from=weirdboyjim 0:00 Introduction 2:34 What type of Flow Control? 4:54 Demonstrating the problem 11:56 Adding a temporary header 14:13 Spare Gates? 14:38 4 Bit Binary Comparisons 16:32 Breadboard Prototype RTS 18:33 Local Device CTS 20:09 Update the Schematic 22:37 Update the PCB Design 27:44 PCB Order 28:18 Unboxing 29:08 Solder Paste 30:13 Component Placing 32:48 Reflow 33:20 Hand Soldering 36:08 Install and Test 37:48 Outro