Question: Are the bits in the JEDEC file MSB to LSB justified? In other words, is the first bit in a given stream Most Significant or Least Significant?
Answer: In the JEDEC file, the bits are arranged as a stream of bits delimited by the L-field and the next * symbol . You break the stream down into bytes with the first bit being the MSB. For example, say the JEDEC file contains the following:
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QP0008* QF2048* G0*
L00064
1100001100000000
1111111100011000*
L00512 0010010010000001 ....
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The first L-field L00064 corresponds to byte address 08H. So, the first data byte that goes to address 08H is 11000011 (C3H), the second data byte that goes to address 09H is 00000000 (00H), the third that goes to address 0AH is 11111111 (FFH) and the 4th byte that goes to address 0BH is 00011000 (18H). The start (*) ends this stream to start a new contiguous write at address 064H (bit 512). That will hold the first byte of the new stream (00100100 or 24H) etc...
