View Single Post
Old 16th Apr 2018, 11:30 am   #7
Join Date: Apr 2018
Location: Newbury, Berkshire, UK.
Posts: 146
Default Re: MK14 schematic revisions

An additional difficulty is that SOC changed which gates within packages were used, so the pin numbers in the v2 schematic are not the same as in the note... perhaps they were referring to a v1 board!
However I've worked it out (please excuse the rubbish image editing!)
Basically the reset circuit is reworked to free up a NOT gate and the spare gates used to NAND the inverted A9,10,11 signals with RDS or WDS.
Attached Thumbnails
Click image for larger version

Name:	prom_mods_1.png
Views:	217
Size:	24.9 KB
ID:	161211  
Slothie is offline   Reply With Quote