Application Circuits

HT47C10L

Rev. 1.90

21

November 30, 2005

Option Register

The following shows many kinds of mask options in the HT47C10L. All these options should be defined in order to en-

sure proper system functioning.

Bit No.

Label

Function

Reset State

0

WDTEN

WDT enable or disable selection (0: enable; 1: disable)

0

1

2

BZFREQ0,

BZFREQ1

Buzzer output frequency selection

BZFREQ1~BZFREQ0

2

3

4

5

01

3

BZMODE

To define the PA0 and PA1 output function

0=Normal output

1=Buzzer output. PA0 is BZ output, PA1 is BZ output.

0

4

ELMODE

To define the PA2 and PA3 output function

0=Normal output

1=EL output. PA2 is EL1 output, PA3 is EL2 output.

0

5

STANDBY

Oscillator/LCD are on or off when CPU HALT

0=Oscillator/LCD is off at HALT

1=Oscillator/LCD is on at HALT

0

6~7

¾

Unused bit, read as

²0²

00

OPT1 (26H) Register

Bit No.

Label

Function

Reset State

0~7

PH

PA0~PA7 pull-high option in input mode (0: enable; 1: disable)

00H

OPT2 (27H) Register

H T 4 7 C 1 0 L

S E G 0 ~ 8

C O M 0 ~ 3

L C D

P a n e l

V C C

C 1

C 2

P A 0 / B Z

P A 1 / B Z

V D D

P A 4

P A 5

P A 6

P A 7

L V D

V S S

R C I N

R R E F

R S E N

P A 2 / E L 1

P A 3 / E L 2

T E S T 1

T E S T 2

1 k W

2 N 5 5 5 1

2 N 5 5 5 1

E L

R L S 4 1 4 8

1 5 m H

1 . 5 V

2 2 0 0 p F

S e n s o r

1 0 0 k W

0 . 1 m F

0 . 1 m F

R E S

0 . 1 m F

V D D

V S S

1 0 m F

1 0 0 k W

0 . 1 m F