
MC97F6108A User’s manual
14. 12-bit AD Converter (ADC)
141
Figure 61. 12-bit ADC Block Diagram
Figure 62. A/D Analog Input Pin with a Capacitor
AVREF
Analog
Power
Input
22uF
Figure 63. A/D Power (AVREF) Pin with a Capacitor
0 - 100
Ω
0
–
1000pF
ANx
Analog
Input
VDD18
AN7
AN6
AN5
AN1
AN0
Successive
Approximation
Circuit
ADIF
ADCRH[7:0]
(8bit)
ADCRL[7:4]
(4bit)
Resistor Ladder
Circuit
ADST or Trigger
VREF
12bit A/D Converter Data Register
ADSEL[3:0]
4
12
ADC
Interrupt
Pre
scale
MUX
÷
2
÷
4
÷
8
÷
32
SCLK
CKSEL[1:0]
2
ADST or EXTRG
Clear
Comparator
[9B
H
]
[9C
H
]
ADCLK