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boards:ecb:4pio:errata [2018/09/16 03:16]
b1ackmai1er
boards:ecb:4pio:errata [2019/03/02 19:49] (current)
b1ackmai1er
Line 1: Line 1:
 ====== R03 Errata ====== ====== R03 Errata ======
  
-PIO 0+Trace cuts:
  
-PIO 1+  - Cut pin 26 of IC12 (PIO-3) away from the ground plan. 
 +  - Cut the trace between C24 and pin 11 of IC12 (PIO-3) 
 +  - Cut the trace between C23 and pin 11 of IC9 (PIO-2) 
 +  - Cut the ground plane away from the via. 
 +  - Cut the ground plane to separate pin 26 of IC8 (PIO-0) and C11. 
 +  - Cut the trace from C11 to the via. 
 +  - Cut the trace between pin 11 of IC8 (PIO-0) and C8. 
 +  - Cut the trace between pin 5 of IC8 (PIO-0) and pin 18 of IC4. 
 +  - Cut the trace between pin 6 of IC8 (PIO-0) and pin 17 of IC4. 
 +  - Cut the trace between pin 34 of IC9 (PIO-2) and pin 18 of connector P3. (Updated 3-Feb-2019)
  
-PIO 2++5v connection:
  
-PIO 3+A. Link pin 26 (IC12 PIO-3) to C12 to C9 to C11 to C8.
  
-Initial state:+GND connection:
  
-  * Pin 26 (+5v) is connected to the ground plane. +BLink C12 to C9 to C11 to pin 11 IC8 (PIO-0) to C8.
-  * Pin 11 (gndis connected ​to +5v via C24+
  
-End state:+Address selection connection:
  
-  * Pin 26 (+5vdisconnected from ground plane and connected to +5v by wire link. +C. Link pin 5 of IC8 (PIO-0) and pin 17 of IC4.
-  * Pin 11 (gnd) connection is changed from a VCC plane to a GND plane.+
  
-Steps:+D. Link pin 6 of IC8 (PIO-0) and pin 18 of IC4.
  
-  - Cut the thermal relief links between pin 6 of IC12 (pio3) and the ground plane. +{{https://​www.retrobrewcomputers.org/​lib/​plugins/​ckgedit/​fckeditor/​userfiles/​image/​boards/​ecb/​4pio/​errata/​errata-v3.png?​nolink&​800x968}}
-  - Link pin 6 of IC12 (pio 3) to pin 2 of C12. +
-  - Cut the link between pin 11 of IC12 (pio 3) and + pin of C24. +
-  - Link pin 11 of IC12 (pio 3) to the GND pin of C24. +
-  - Cut the link between pin 6 IC9 (pio 2) and pin 18 of P3. +
- +
-{{https://​www.retrobrewcomputers.org/​lib/​plugins/​ckgedit/​fckeditor/​userfiles/​image/​boards/​ecb/​4pio/​errata/​ecb-4pio-errata-pio3.png?​nolink&​598x877}}+
  
  
boards/ecb/4pio/errata.1537082164.txt.gz · Last modified: 2018/09/16 03:16 by b1ackmai1er
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