reading the eprom using an arduino board
ref: https://www.speakev.com/attachments/dat ... ng.116112/
The (lower 256-words) memory contents from Rupert's posting on the speakev forum:
Background: Rupert read out the contents of the lower 256-words of the eprom from 2 different boards. He thought his issue was in CMU08 based upon really high voltages shown in Canion cell data, but he was using an incorrect pack layout diagram of the CMU
numbering. So he pulled CMU02 instead of 08, and ordered a replacement board
08 from a dismantler (which was also an 02).
Notes: the differences are highlighted; the replacement shows a value "2" in several rows, which could be the CMU
ID number, but the original is blank in those locations.
The eprom holds 512 words of 16-bit data. So the memory addresses would range from 0x000 to 0x1FF. The rows that contain the majority of the data seem to be organized to contain a cell address number in bits 7-9 of the address:
i am adding brackets around the [cell address] bits
Hex binary address
0x010 000[0 00]01 0000 MUT or CAN buss cell A, at the most positive terminal of a module
0x050 000[0 01]01 0000 B
0x090 000[0 10]01 0000 C
0x0D0 000[0 11]01 0000 D, at the most negative terminal of a 4-cell module (CMU06 or 12)
if i extend this bit scheme, then a read of the upper 256-words should have cell data in these rows:
0x110 [1 00]01 0000 MUT or CAN buss cell E
0x150 [1 01]01 0000 F
0x190 [1 10]01 0000 G
0x1D0 [1 11]01 0000 H, at the most negative terminal of an 8-cell modules.