Dear Company,
I am developing the weigher built on your IC LMP90100 and need to make calibration.
According the datasheet this IC has CHx_SCAL registers. I had checked the formats of them, but it was problematic to understand the format of the CHx_SCAL_GAIN registers placed on the addresses 0x33+8n - 0x35+8n (where n is number of the channel). According to the manual these registers are the gain coefficients at 24-bit 1.23 unsigned fix point binary format (Page 27). But nothing is written about that anymore.
What does it mean the default value 0x800000? Does it meat 1.000 real value or 1.500? If these registers are defined as mantissa-exponent which part of them contains the mantissa and which one the exponent? And if these registers are defined as the fractions, which part of them is defined as numerator and which one as denumerator? Also when I tried to change the values of these registers I so, that in some cases the result was changed to the negative although, according to manual, these registers are in unsigned format. Do these registers contain the sign bit too or it was hapened because of the result overfloating?
Thank your for paying attention.