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!

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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