MEGA128CAN Datasheet, PDF (266/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

Figure 127. Analog to Digital Converter Block Schematic
8-BIT DATA BUS
ADC MULTIPLEXER
SELECT (ADMUX)
MUX DECODER
ADC CONVERSION
COMPLETE IRQ
INTERRUPT
FLAGS
ADTS[2:0]
ADC CTRL. & STATUS
REGISTER (ADCSRA)
15
0
ADC DATA REGISTER
(ADCH/ADCL)
TRIGGER
SELECT
PRESCALER
START
AVCC
INTERNAL
REFERENCE
AREF
GND
ADC7
ADC6
ADC5
ADC4
ADC3
ADC2
ADC1
ADC0
BANDGAP
REFERENCE
POS.
INPUT
MUX
CONVERSION LOGIC
10-BIT DAC
SAMPLE & HOLD
COMPARATOR
-
+
ADHSM
SINGLE ENDED / DIFFERENTIAL SELECTION
DIFFERENTIAL
AMPLIFIER
+
-
ADC MULTIPLEXER
OUTPUT
NEG.
INPUT
MUX
266 AT90CAN128
4250E–CAN–12/04