HT9320 datasheet(9/29 Pages) HOLTEK

9 / 29 page

HT9320 Series

Rev. 1.10

October 1, 2002

Functional Description

Keyboard matrix

C1~C8 and R1~R5 form a keyboard matrix. Together

with a standard 5

´8 keyboard, the keyboard matrix is

used for dialing entries. In addition, the keyboard matrix

also provides resistor options for different dialing specifi-

cation selections. The keyboard arrangement for the

HT9320 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

Various dialing specifications can be selected by adding

resistors across keyboard matrix pins. The allowable

option resistor connections are shown on the table.

All the resistors are 330k

W. The resistor option functions

and the default specifications (without option resistors)

are listed below (HT9320A/B/C/K/L).

Option

Resistor

Option

Function

Default

(No Resistor)

RK12

(HT9320B/C/K/L)

Ratio

Selection

40:60

RK13

Flash

Function/

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

RK51

(HT9320A /B/C/K)

Inter-digit-

Pause Time for

10pps

800ms

RK51

RK61

RK71

(HT9320L)

International

Direct Dialing

Lock Selection

Normal dialing

(unlock)

M/B ratio selection table

· HT9320A

M/B Pin

M/B Ratio (%)

VSS

33.3:66.6

Floating

40:60

· HT9320B/C/K/L

RK12

M/B Ratio (%)

40:60

Yes

33.3:66.6

· HT9320H

M/B Pin

M/B Ratio (%)

VDD

33.3:66.6

VSS

40:60

R 1

R 2

R 3

R 4

K 2 1

C 1

C 2

C 3

C 4

C 5

C 6

C 7

K 3 1

K 4 1

K 5 1

K 6 1

K 7 1

K 1 2

K 1 3

K 1 4

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