HT9320 datasheet(11/30 Pages) HOLTEK

11 / 30 page

Symbol

Parameter

Test Conditions

Min.

Typ. Max. Unit

VDD

Conditions

THD

Tone Signal Distortion

2.5V RL=5kW¾

-30

-23

TTMIN Minimum Tone Duration

¾ Auto-redial

82.5

TITPM Minimum Inter-tone Pause ¾ Auto-redial

85.5

THD (Distortion) (dB) = 20 log ( V1

Vn / Vi

)

Vi, Vh: Row group and column group signals

V1, V2, ... Vn: Harmonic signals (BW=300Hz~3500Hz)

HT9320

July 21, 1999

Functional Description

Keyboard matrix

C1~C8 and R1~R5 form a keyboard matrix. To-

gether with a standard 5´8 keyboard, the key-

board matrix is used for dialing entries. In

addition, the keyboard matrix also provides resis-

tor options for different dialing specification se-

lections. The keyboard arrangement for the

HT9320 series are shown in the Keyboard In-

formation.

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:%Errordoesnotcontainthecrystalfrequency

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 330kW. The resistor option

functions and the default specifications (with-

outoptionresistors)arelistedbelow(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

K2 1

K3 1

K4 1

K5 1

K6 1

K7 1

K1 2

K1 3

K1 4

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