- Name:
-
adcconfig
- Syntax:
-
ADCCONFIG config
Config - is a constant/variable specifying the adc configuration.
- Description:
-
Configure the ADC reference voltages.
The default Vref+signal for the ADC is the power supply (V+) and the default Vref- signal is 0V, so the analogue voltage range is the same as the power supply to the PICAXE chip. However, if desired, the Vref signals can be altered to external pins instead by using adcconfig command.
PICAXE X2 Parts
| Bit3-2 |
= 11 do not use |
| |
= 10 VRef+ is FVR (see FVRsetup command) |
| |
= 01 VRef+ is external pin |
| |
= 00 VRef+ is V+ (power supply) |
| Bit1-0 |
= 11 do not use |
| |
= 10 do not use |
| |
= 01 VRef- is external pin |
| |
= 00 VRef- is 0V |
PICAXE M2 Parts
| Bit2 |
= 1 VRef- is external pin (if available) |
| |
= 0 VRef- is 0V |
| Bit1-0 |
= 11 VRef+ is FVR (see FVRsetup command) |
| |
= 10 VRef+ is external pin (if available) |
| |
= 01 do not use |
| |
= 00 VRef+ is V+ (power supply) |
PICAXE External Vref+ pin / External Vref- Pin
| PICAXE |
External Vref+ pin |
External Vref- Pin |
| 08M2 |
C.1 |
n/a |
| 14M2 |
B.1 |
n/a |
| 18M2 |
n/a |
C.2 |
| 20M2 |
B.0 |
n/a |
| 28X2 |
A.3 |
A.2 |
| 40X2 |
A.3 |
A.2 |