CHAPTER 10 A/D CONVERTER
Preliminary User’s Manual U16898EJ1V0UD
154
Figure 10-2 shows the block diagram of A/D converter.
Figure 10-2. Block Diagram of A/D Converter
AV
REF
V
SS
INTAD
ADCS bit
2
ADS1
ADS0
Sample & hold circuit
V
SS
Voltage comparator
Controller
A/D conversion result register
(ADCR, ADCRH)
Analog input
channel specification
register (ADS)
A/D converter mode
register (ADM)
Internal bus
Successive
approximation
register (SAR)
ANI0/P20
ANI1/P21
ANI2/P22
ANI3/P23
ADCS
FR2
FR1
ADCE
FR0
Selector
Tap selector
Caution In the 78K0S/KA1+, V
SS
and AV
SS
are internally connected. Be sure to connect V
SS
to a stable
GND, and stabilize V
SS
via GND (= 0 V).
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