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NEC PD17062 User Manual

Page 98

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98

µ

PD17062

10.5.2 A/D Converter Data Register

Fig. 10-5 shows the functions of the A/D converter data register.

The A/D converter data register sets the A/D converter comparison voltage.

Because the A/D converter is a 4-bit converter, the four low-order bits of the A/D converter data register

are valid.

Fig. 10-5 A/D Converter Data Register Functions

DBF3

0CH

DBF2

0DH

DBF1

0EH

DBF0

0FH

b

15

b

14

b

13

b

12

b

11

b

10

b

9

b

8

b

7

b

6

b

5

b

4

b

3

b

2

b

1

b

0

b

7

b

6

b

5

b

4

b

3

b

2

b

1

b

0

0

ADCR

02H

A/D converter comparison voltage V

REF

setting

0

0

0

0

1

x

15

8

V

REF

= 0 V

Fixed at 0

V

REF

=

V

DD

(V)

x - 0.5

15

×

A/D converter

Symbol

Peripheral

address

Peripheral hardware

Name

Peripheral register

Name

Data buffer

Symbol

Address

Bit

Data

Don't care

Don't care

Transfer data

GET

PUT

A/D converter

data register

Valid data