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CHAPTER 14 A/D CONVERTER
ANI0/P10
ANI1/P11
ANI2/P12
ANI3/P13
ANI4/P14
ANI5/P15
ANI6/P16
ANI7/P17
Selector
A/D Converter Mode Register
3
Trigger Enable
ES40, ES41
Note 3
Sample & Hold Circuit
3
CS
ADIS3
4
Internal Bus
Internal Bus
Edge
Detector
Control
Circuit
Series Resistor String
AV
DD
Voltage
Comparator
Tap Selector
INTAD
INTP3
Successive
Approximation
Register (SAR)
A/D Converter Input Select Register
ADIS2
ADIS1
ADIS0
Note 1 Note 2
ADM1-ADM3
INTP3/P03
TRG FR1
FR0
ADM3 ADM2
ADM1
A/D Conversion
Result Register
(ADCR)
AV
REF0
AV
SS
Selector
HSC
Figure 14-1. A/D Converter Block Diagram
Notes 1. Selector to select the number of channels to be used for analog input.
2. Selector to select the channel for A/D conversion.
3. Bits 0 and 1 of external interrupt mode register 1 (INTM1)