ST9 datasheet(136/146 Pages) STMICROELECTRONICS

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ST9 USER GUIDE

6.11 ADC

Figure 52

. Analog to Digital Converter Block Diagram

INTERRUPT UNIT

INT. VECTOR POINTER

INT. CONTROL REGISTER

COMPARE RESULT REGISTER

THRESHOLD H/L REGISTER BU

THRESHOLD H/L REGISTER BL

THRESHOLD H/L REGISTER AH

THRESHOLD H/L REGISTER AL

COMPARE LOGIC

DATA REGISTER H/L15

DATA REGISTER H/L14

DATA REGISTER H/L13

DATA REGISTER H/L12

DATA REGISTER H/L11

DATA REGISTER H/L10

DATA REGISTER H/L 9

DATA REGISTER H/L 8

SUCCESSIVE

ANALOG TO DIGITAL

ANALOG

MUX

AIN 15

AIN 14

AIN 13

AIN 12

AIN 11

AIN 10

AIN 9

AIN 8

CONVERSION

RESULT

AUTOSCAN LOGIC

CONTROL REG.2

CONTROL

LOGIC

INTERNAL

TRIGGER

EXTERNAL

TRIGGER

CONTROL REG.1

DATA REGISTER H/L 7

DATA REGISTER H/L 6

DATA REGISTER H/L 5

DATA REGISTER H/L 4

DATA REGISTER H/L 3

DATA REGISTER H/L 2

DATA REGISTER H/L 1

DATA REGISTER H/L 0

AIN 7

AIN 6

AIN 5

AIN 4

AIN 3

AIN 2

AIN 1

AIN 0

APPROXIMATION

10 bit

ANALOG

SECTION

CK PRESCALER

CKAD

INTCLK

(from MFT0)

(EXTRG)

(CLR2)

(CLR1)

CONVERTER

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