ATXMEGA128B1_14 Datasheet, PDF (50/142 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA B1 Microcontroller

Figure 29-1. ADC overview
ADC0
•
•
•
ADC15
Internal
signals
V_INP
ADC
Compare
Register
CH0 Result
<
> _Threshold
(Int Req)
ADC0
•
•
•
ADC7
V_INN
Internal 1.00V
Internal VCC/1.6V
Internal VCC/2
AREFA
AREFB
Reference
Voltage
The ADC may be configured for 8- or 12-bit result, reducing the minimum conversion time (propagation delay) from
3.35µs for 12-bit to 2.3µs for 8-bit result.
ADC conversion results are provided left- or right adjusted with optional ‘1’ or ‘0’ padding. This eases calculation when
the result is represented as a signed integer (signed 16-bit number).
PORTA and PORTB each has one ADC. Notation of these peripherals are ADCA and ADCB, respectively.
XMEGA B1 [DATASHEET] 50
Atmel-8330F-AVR-ATxmega64B1-128B1_datasheet–AVR–02/2014