Microchip Technology SAM Series User Manual

Figure 12-4. Typical SAM/PIC32CM SAR ADC Block Diagram
R
RESULT
INTREF
AINy
GND
AINx
INPUTCTRL.MUXNEG
AINa
AINb
AINn
VBAT / 4
VDDIO / 4
VDDCORE / 4
DAC
VBGAP
INPUTCTRL.MUXPOS
D
N-
1
D 0
D 1
D 2
_
+
DAC
SAR
COMPARATOR
INTFLAG.RESRDY
(Result Ready)
SAMPLE-HOLD
INPUTCTRL.DIFFMODE
1
0
WINUT
WINLT
CTRLB.WINMODE
_
+
WINLT < RESULT < WINUT
_
+
RESULT < WINUT
RESULT > WINLT
OFFSETCORR
÷
2
N
n=1-8
CTRLA.PRESCALER[n]
GCLK_ADCx
REFCTRL.REFCOMP
(Discard 1
st
5 Conv)
Ry
Rx
_
+
Rw
VREF MUX
V
BGAP
VREF.SEL
Rz
Voltage References System
R
INTFLAG.OVERRUN
INTFLAG.WINMON
VREF.VREFOE
SAMPCTRL
F
ADCx
CLOCK
÷4
SAMPCTRL.OFFCOMP
1
0
SWTRIG.START
CTRLB.FREERUN
EVCTRL.STARTEI
EVCTRL.STARTINV
From Event Sys HDW user
START trigger
#Convert
SET
Q
RST
Sample / #Convert
VREFA
VDDANA
_
+
REFCTRL.REFSEL
VREFB
VREFC
VREF MUX
VDDANA / 2
R
VDDANA / 2
RESS
Σ
CTRLB.CORREN=1
(+13 ADC Clocks)
GAINCORR
Sample
F
ADC Host
CLOCK
DAC > AIN: RESULT Bit Dwn = 0
DAC ≤ AIN: RESULT Bit Up = 1
UP / DWN
AIN
CTRLA.SLAVEEN
0
1
F
ADCx
CLOCK
Return to Checklist
ADC
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echnology Inc.
and its subsidiaries
Manual
DS70005439B-page 56

Microchip Technology SAM Series Specifications

General

Brand	Microchip Technology
Model	SAM Series
Category	Microcontrollers
Language	English