HT9201A Ver la hoja de datos (PDF) - Holtek Semiconductor

Número de pieza

componentes Descripción

Fabricante

HT9201A

Simple Tone Dialer

Holtek Semiconductor 

HT9201A/B

Functional Description

Keyboard matrix

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

keyboard arrangement for each of the HT9201

series are shown in the Keyboard Information.

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

C4

1633

1645

% Error

+0.29%

–0.52%

–0.59%

+0.74%

+0.50%

–0.30%

–0.34%

+0.73%

Note: % Error does not contain the crystal frequency

drift

Key definition

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ∗, #, A, B, C, D keys

These are the dialing number input keys for

normal operation.

Timing Diagrams

• F1, F2, F3, F4

The flash keys can be selected with different

flash times as shown in the following table.

Flash time selection table

Key

Flash Time (ms)

F1

600

F2

300

F3

200

F4

90

Keyboard operation

5

3rd Dec ’97

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