Part Number: AM4379
Hi all,
I'd like to know how to use ADC1.
When ADC0 is used with the same setting, it is correctly converted.
However, using ADC1 does not convert properly as follows.
VDDA : 1.5V
Input voltage : 720mV
Converted value : 0x3FF
SampleDelay : 0x20
(1.5V / 4096) * 0x3FF = (1.5V / 4096) * 1023
= 374mV
VDDA : 1.5V
Input voltage : 400mV
Converted value : 0x1FF
SampleDelay : 0x20
(1.5V / 4096) * 0x1FF = (1.5V / 4096) * 511
= 187mV
The register is set as follows.
| register | setting |
| ADC1_CTRL | 0x0000_0043 |
| ADC1_CLKDIV | 0x0007 |
| ADC1_STEPEN | 0x0000_001E |
| ADC1_STEPCONFIG1 | 0x0004_0001 |
| ADC1_STEPDELAY1 | 0x0000_0000 |
| ADC1_STEPCONFIG2 | 0x000C_0001 |
| ADC1_STEPDELAY2 | 0x0000_0000 |
| ADC1_STEPCONFIG3 | 0x0014_0001 |
| ADC1_STEPDELAY3 | 0x0000_0000 |
| ADC1_STEPCONFIG4 | 0x001C_0001 |
| ADC1_STEPDELAY4 | 0x0000_0000 |
Does anyone know what is wrong?
Best regards,
Sasaki
