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CHAPTER 12 8-BIT A/D CONVERTER (
µ
PD780344, 780344Y SUBSERIES)
User’s Manual U15798EJ2V0UD
Figure 12-1. 8-Bit A/D Converter Block Diagram
Note
The valid edge of the external interrupt is specified by bit 3 of the EGP and EGN registers (see
Figure
19-5 Format of External Interrupt Rising Edge Enable Register (EGP), External Interrupt Falling Edge
Enable Register (EGN)
).
ANI0/P10
ANI1/P11
ANI2/P12
ANI3/P13
ANI4/P14
ANI5/P15
ANI6/P16
ANI7/P17
Sample & hold circuit
Voltage comparator
Successive
approximation
register (SAR)
Controller
Edge
detector
ADTRG/INTP3/P03
3
A/D conversion result
register 1 (ADCR1)
AV
DD
AV
SS
INTAD0
INTP3
Trigger enable
A/D converter
mode register 0 (ADM0)
Analog input channel
specification register 0 (ADS0)
Internal bus
ADS02 ADS01 ADS00 ADCS0 TRG0 FR02 FR01 FR00 EGA01 EGA00
Selector
Tap selector
Edge
detector
Note
Series resistor string
ADCE0