Justin Mammarella
Justin Mammarella
I read 4.5V as well. Now check GND (from double pin header) to the supply voltage of each chip
> "edit; > Gave the board another clean and instantly got a bank0 read error, reconnected the usb cable and back to the initial bank0 mismatch error. > Not sure...
My only other suggestion would be to re-flow the solder joints on the SRAM and octal latch. This would rule out a cold solder joint... Another less scientific test would...
@yatli If bank select is not working, then it should read/write to the same bank. Previously he was getting as far as 2A00 which is 2560 bytes.. I thought this...
SRAM Test Failed bank0 mismatc Yeah he's getting a mismatch. ~Which means the value read from bank 1 doesn't match the value read from bank 0.~ A static address line...
https://andybrown.me.uk/2011/08/28/512kb-sram-expansion-for-the-arduino-mega-design/ reference ^
``` When choosing a latch we must ensure that it is fast enough to cope with the 16Mhz core clock of the Arduino. 74HC series latches are too slow. The...
@yatli what type of latch are you using. I'm running 74AHC series.
yeah I just checked a few of my boards. I have a mix of 74AH and 74H. Presumably if this was a problem it would have come up in my...
@frnktrpz please follow @yatli suggestion and uncomment the debug info from the SRAM test. Paste output here. Cheers.