Other Parts Discussed in Thread: MSP430FR6041, MSP430FR5043, MSP430FR5041
Hi, there is a question about the convertion between uss adc capture value and real SDHS analog input in MSP430FR6043.
from SDHS example code in "MSP430FR6043_MSP430FR6041_MSP430FR5043_MSP430FR5041_Code_Examples" , I get a formula about the convertion between uss adc capture value and real SDHS analog input.
it is as below,
// V = (adc_code * (f_s/2))/(gain*7FF) + Bias
// where,adc_code is the ADC result(16-Bit Signed Int),f_s = .755V(Full-scale voltage),
// gain = 10^(0.1/20)) = approximately 1, Bias = .9V, 7FF = 2047
question1: why f_s is 0.755v?
I search the forums and get some information about the SDHS convertion.
It seems the Full scale is +-500mv centered on the Rx Bias,and the maximum input signal range is 1000mv.
If Rx Bias is set to be 0.9v,the range will be 0.4v~1.4v.
question2: what is the exact input signal range?
thanx。