Samsung Microcassette Recorder 8-Bit CMOS Microcontroller Benutzerhandbuch

Conversion Data Register ADDATAH/ADDATAL

D1H/D2H, Page 0, Read Only

.9

.8

.7

.6

.5

.4

.3

.2

MSB

LSB

(ADDATAH)

-

-

-

-

-

-

.1

.0

MSB

LSB

(ADDATAL)

In the ADC function block, the analog input voltage level is compared to the reference voltage. The analog input
level must remain within the range V

SS

 to V

DD

.

Different reference voltage levels are generated internally along the resistor tree during the analog conversion
process for each conversion step. The reference voltage level for the first conversion bit is always 1/2 V

DD

.

Input Pins

AD0-AD3

(P1.0-P1.3)

Clock

Selector

Conversion Result

(ADDATAH/ADDATAL,

D1H/D2H, Page 0)

-

+

To ADCON.3
(EOC Flag)

Successive

Approximation

Logic & Register

V

DD

V

SS

Analog
Comparator

10-bit D/A

Converter

M

U

X

ADCON.4-5

(Select one input pin of the assigned pins)

P1CON

(Assign Pins to ADC Input)

ADCON.0
(AD/C Enable)

ADCON.0
(AD/C Enable)

..

.

ADCON.2-.1