HT9302C datasheet(7/27 Pages) HOLTEK

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HT9302 Series

Rev. 1.20

September 30, 2002

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)

% Error

Specified

Actual

697

699

+0.29%

770

766

-0.52%

852

847

-0.59%

941

948

+0.74%

1209

1215

+0.50%

1336

1332

-0.30%

1477

1472

-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.

All the resistors are 330k

W. 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

Flash Function and

Flash Time Selection

Flash=control function

Flash time=600ms

RK14

RK21

Pause & P

®T

Duration Selection

tP=3.6s

tP®T=3.6s

RK31

Pulse Number

Selection

RK41

M/B ratio selection table

RK12

M/B Ratio (%)

40:60

Yes

33.3:66.6

Flash function/time (duration) selection table

RK13

RK14

Flash

Function

Flash

Time (tF)

Control

600ms

Yes

Digit

600ms

Yes

Digit

98ms

Yes

Digit

300ms

Pause and P

®T duration selection table

RK21

tP (sec)

tP®T (sec)

3.6

Yes

Pulse number selection table

· This table shows pulse number selections for

HT9302x.

RK31

RK41

Pulse Number

Yes

N+1

Yes

-N

Yes

· HT9302G has different selection method listed in the

table below.

RK31

Pulse Number

Yes

10-N

C 4

C 3

C 2

C 1

R 4

R 3

R 1

R 2

K 2 1

K 3 1

K 4 1

K 1 2

K 1 3

K 1 4

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