BTnode rev2_2 Extended Memory Patch
Several different SRAM devices have been used in the assembly of the BTnodes. BTnodes with more than 64kB SRAM will have a problem with the extended memory, since some address pins are floating. All other functions should work ok though.
Good memory devices
512 kbit Amic A62S6308X-70SI
Faulty memory devices
2 Mbit Amic LP62S2048X-LLT
1 Mbit Amic LP62S1024BX-70LLT
2 Mbit Cypress CY62128VLL-70ZAC
In order to make use of the extended memory (upper 60k) on faulty BTnode rev2_2 you will need to add a solderball bridging pins 8 (VCC), 9 (A5) and 10 (A6) as shown in the pictures below.
You can use this programm to test your memory:
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