GMS81C7008 datasheet(67/123 Pages) HYNIX

67 / 123 page

GMS81C7008/7016

APR., 2001 Ver 2.01

Note that BUR is a write-only register.

The 6-bit counter is cleared and starts the counting by writing sig-

nal at BUR register. It is incremental from 00H until it matches 6-

bit BUR value.

When main-frequency is 4MHz, buzzer frequency is shown as

below table. The unit is kHz.

BUR

[5:0]

BUCK[1:0]

BUR

[5:0]

BUCK[1:0]

250.000

125.000

83.333

62.500

50.000

41.667

35.714

31.250

125.000

62.500

41.667

31.250

25.000

20.833

17.857

15.625

62.500

31.250

20.833

15.625

12.500

10.417

8.929

7.813

31.250

15.625

10.417

7.813

6.250

5.208

4.464

3.906

7.576

7.353

7.143

6.944

6.757

6.579

6.410

6.250

3.788

3.676

3.571

3.472

3.378

3.289

3.205

3.125

1.894

1.838

1.786

1.736

1.689

1.645

1.603

1.563

0.947

0.919

0.893

0.868

0.845

0.822

0.801

0.781

27.778

25.000

22.727

20.833

19.231

17.857

16.667

15.625

13.889

12.500

11.364

10.417

9.615

8.929

8.333

7.813

6.944

6.250

5.682

5.208

4.808

4.464

4.167

3.906

3.472

3.125

2.841

2.604

2.404

2.232

2.083

1.953

6.098

5.952

5.814

5.682

5.556

5.435

5.319

5.208

3.049

2.976

2.907

2.841

2.778

2.717

2.660

2.604

1.524

1.488

1.453

1.420

1.389

1.359

1.330

1.302

0.762

0.744

0.727

0.710

0.694

0.679

0.665

0.651

14.706

13.889

13.158

12.500

11.905

11.364

10.870

10.417

7.353

6.944

6.579

6.250

5.952

5.682

5.435

5.208

3.676

3.472

3.289

3.125

2.976

2.841

2.717

2.604

1.838

1.736

1.645

1.563

1.488

1.420

1.359

1.302

5.102

5.000

4.902

4.808

4.717

4.630

4.545

4.464

2.551

2.500

2.451

2.404

2.358

2.315

2.273

2.232

1.276

1.250

1.225

1.202

1.179

1.157

1.136

1.116

0.638

0.625

0.613

0.601

0.590

0.579

0.568

0.558

10.000

9.615

9.259

8.929

8.621

8.333

8.065

7.813

5.000

4.808

4.630

4.464

4.310

4.167

4.032

3.906

2.500

2.404

2.315

2.232

2.155

2.083

2.016

1.953

1.250

1.202

1.157

1.116

1.078

1.042

1.008

0.977

4.386

4.310

4.237

4.167

4.098

4.032

3.968

3.906

2.193

2.155

2.119

2.083

2.049

2.016

1.984

1.953

1.096

1.078

1.059

1.042

1.025

1.008

0.992

0.977

0.548

0.539

0.530

0.521

0.512

0.504

0.496

0.488

Table 16-1 Buzzer Frequency at 4MHz

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