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CHAPTER 12 A/D CONVERTER
User’s Manual U15109EJ3V0UD
455
The block diagram is shown below.
Figure 12-1. Block Diagram of A/D Converter
ANI0
ANI1
ANI2
ANI3
ANI4
ANI5
ANI6
ANI7
ANI8
ANI9
ANI10
ANI11
ADCGND
INTAD
4
ADS3
ADS2
ADS1
ADS0
ADCS
TRG
FR2
FR1
FR0
EGA1
EGA0 ADPS
Selector
Sample & hold circuit
ADCGND
Voltage comparator
Tap selector
ADTRG
Edge
detector
Controller
A/D conversion result
register (ADCR)
Trigger enable
Analog input channel
specification register (ADS)
A/D converter mode
register 1 (ADM1)
Internal bus
IEAD
A/D converter mode
register 2 (ADM2)
Successive
approximation
register (SAR)
ADCV
DD