-
AT90S8535
2013
..
681.3
- AT90S8535: . / .. . .... . 2013.
AT90S8535.
.
220700.62, .
.
- .. .
: ..
- (
. : , (). , . 8 28=256 , 10 210=1024 . , 0 10. Atmega8, 10 . 10 1024 . 10/1024=0,0097 .
, , , . , 50-200 .
. (2,3-2,7) , . AVCC Aref, .
AVCC . AVCC , 0,3. , (Vref), 2-AVCC. , 5.
, . , 10, 5. , 2 .
:
U = UR2/(R1 + R2)
:
5 = 10*R2/(R1+R2)
(R1+R2)=2*R2
R1=R2
..
|
|
. 3.1
, , = U/U.
:
U=( * * )/
: 5, = 512, =2, 10.
(5*512*2)/1024=5 .
, , . , .
10 , - 2 , 65 - 260 . 10- 8 ( - ) 0 (GND) (REF).
(AGND, REF) (. 4), V V 0,3 . 2 V. $000 , $3FF , , .
, , MUX2, MUX1, MUX0 ADMUX. ADMUX , . - , , .
. ADIF ADC $00 10- ADCL ( 8 ), ADCH ( 2 ). ADC . , 50 - 200 , . 13 100 130 .
ADMUX, ADCH, ADCL, ADCSR, -.