
13. 12-bit ADC
A96G166/A96A166/A96S166 User’s manual
118
13.2
Block diagram
In this section, the 12-bit ADC is described in a block diagram, and an analog input pin and a power
pin with capacitors respectively are introduced.
Clock
Selector
ADCDRH (R), ADCDRL (R)
-
+
Control
Logic
Comparator
ADSEL[3:0]
(Select one input pin
of the assigned pins)
ADCLK
Input Pins
M
U
X
AN0
Reference
Voltage
AVSS
AN1
AN2
AN14
AN15
ADCIFR
AFLAG
INT_ACK
Clear
Clear
To interrupt
block
MUX
VDD
Start
M
U
X
T3 A match signal
EXTINT0~7
REFSEL
TRIG[2:0]
3
ADST
T1 A match signal
EXTINT8
Figure 58. 12-bit ADC Block Diagram
Figure 59. A/D Analog Input Pin with a Capacitor
0 - 100
Ω
0
–
1000pF
ANx
Analog
Input