upd17072 Renesas Electronics Corporation., upd17072 Datasheet - Page 108
upd17072
Manufacturer Part Number
upd17072
Description
4-bit Single-chip Microcontroller With Hardware For Digital Tuning System
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD17072.pdf
(226 pages)
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13.7 Using A/D Converter
13.7.1 Comparing one reference voltage
108
The following shows a program example.
Example To compare voltage input to AD0 pin, V
V
BANK1
SET1
INITFLG
INITFLG
SET1
NOP
NOP
SKT1
BR
BR
ADCIN
> V
REF
ADCON
NOT ADCCH1, ADCCH0 ; P1A2/AD0 pin used as A/D converter pin
ADCRFSEL3, NOT ADCRFSEL2, NOT ADCRFSEL1, NOT ADCRFSEL0
ADCSTRT
ADCCMP
AAA
BBB
, execution branches to AAA; if V
; A/D converter ON
; Sets compare voltage V
; A/D operation starts
; Comparison in progress
; Comparison in progress
; Detects ADCCMP flag and,
; Branches to AAA if False (0)
; Branches to BBB if True (1)
ADCIN
ADCIN
against reference voltage V
< V
REF
, execution branches to BBB.
REF
to 8.5/16
REF
V
DD
PD17072,17073
(8.5/16 V
DD
).
If
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