HT9302G Просмотр технического описания (PDF) - Holtek Semiconductor

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HT9302G

1-memory/2-memory tone/pulse dialer

Holtek Semiconductor 

HT9302 Series

Functional Description

Keyboard matrix

C1~C4 and R1~R4 form a keyboard matrix. Together

with a standard 4´4 keyboard, the keyboard matrix is

used for dialing entries. In addition, the keyboard ma-

trix provides resistor option for different dialing specifi-

cation selections. The keyboard arrangement for each of

the HT9302 series are shown in the Keyboard Informa-

tion.

Tone frequency

Tone

Name

Output Frequency (Hz)

Specified

Actual

R1

697

699

R2

770

766

R3

852

847

R4

941

948

C1

1209

1215

C2

1336

1332

C3

1477

1472

% Error

+0.29%

-0.52%

-0.59%

+0.74%

+0.50%

-0.30%

-0.34%

Note: % Error does not contain the crystal frequency

drift

Dialing specification selection

By means of adding resistors on the keyboard matrix

pins, various dialing specifications can be selected. The

allowable option resistor connections are shown.

C1

R1

R2

C2

C3

C4

R K21

R K31

R K41

R K12

R3

R K13

R4

R K14

All the resistors are 330kW. The resistor option functions

and the default specifications (without option resistors)

are listed below.

Option

Resistor

Option

Function

Default

(No Resistor)

RK12

Make/Break Ratio

Selection

40:60

RK13

RK14

RK21

RK31

RK41

Flash Function and Flash=control function

Flash Time Selection Flash time=600ms

Pause & P®T

Duration Selection

Pulse Number

Selection

tP=3.6s

tP®T=3.6s

N

M/B ratio selection table

RK12

No

Yes

M/B Ratio (%)

40:60

33.3:66.6

Flash function/time (duration) selection table

RK13

RK14

Flash

Function

Flash

Time (tF)

No

No

Control

600ms

No

Yes

Digit

600ms

Yes

No

Digit

98ms

Yes

Yes

Digit

300ms

Pause and P®T duration selection table

RK21

tP (sec)

tP®T (sec)

No

3.6

3.6

Yes

2

1

Pulse number selection table

· This table shows pulse number selections for

HT9302x.

RK31

RK41

Pulse Number

No

No

N

No

Yes

N+1

Yes

No

10-N

Yes

Yes

¾

· HT9302G has different selection method listed in the

table below.

RK31

Pulse Number

No

N

Yes

10-N

Rev. 1.30

7

May 13, 2009

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