Hi fellows, there is some problems when I try to read the test signals.
When 1292r is powered on, I wait for 1000ms to pull pin RESET down. After 10ms, pin RESET is pulled up. After another 10ms, pin CS is pulled down.
And I write these values into the registers. The settings are listed as follows.
CONFIG 1 = 0x02 // 500 SPS
CONFIG 2 = 0x82 // ENABLE Test Signals
LOFF = 0x10
Ch1 = 0x11 // input shorted
CH2 = 0x13 // MVDD for supply measurement
Then I checked the value I read from the registers. They are totally the same as what I wrote.
DRDY is pulsed every 2 ms. SCK is 600kHz.
The status word is 0xC0 0x00 0x00, which seems right.
But when I began to read the data of CH1 and CH2, all I got from is 7FFFFF. Both CH1 and CH2 are 7FFFFF.
If Ch1 is shortcut, it shouldn't be 7FFFFF.
Is there any problems in my setting?
AVDD-AVSS=3V
DVDD-DGND= 3.3V
