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•COM Inc.

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Doc. # 20480086.003

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Global Call Progress Tone Detector

5

MX613

Preliminary Information

Application Information ......

Band Bit (5)

MSB (4)

(3)

(2)

(1)

LSB (0)

HI-“1”/LO-“0”

Bits 0 to 4 represent the measured frequency in the selected band

Bit 5

Output

First

Bits

0 to 4

= N

When a ‘correct’ decode has been allowed and an interrupt generated, a 6-bit data word will be presented at the Serial

Output Port. This 6-bit word indicates the input frequency's band and value as described below.

As an example, the following binary-word presented at the Serial Output Port

in the HI Band of between 1680Hz and 1740Hz (Bit-5 = “1” = HI, ‘N’ = 22).

N = int (Frequency x Measurement Period)

Measurement Period

= 39.47ms for Low Band

(300Hz to 660Hz)

= 13.16ms for High Band

(900Hz to 2150Hz)

Note: For input frequencies of between 661Hz and 899Hz the MX613 will give no reliable output.

When a ‘correct’ decode has been allowed and an interrupt generated, a 6-bit data word is presented at the Serial Output

Port. This 6-bit word indicates the input frequency's band (Bit 5) and value ‘N’ as indicated below.

LO Band

HI Band

N

B

5

B

LO Band

HI Band

N

B

5

B

280

840

11

H/L

01011

505

1515

19

H/L

1

0

0

1

1

285

855

11

510

1530

20

H/L

1

0

1

0

0

290

870

11

515

1545

20

295

885

11

520

1560

20

300

900

11

525

1575

20

305

915

12

H/L

01100

530

1590

20

310

930

12

535

1605

21

H/L

1

0

1

0

1

315

945

12

540

1620

21

320

960

12

545

1635

21

325

975

12

550

1650

21

330

990

13

H/L

01101

555

1665

21

335

1005

13

560

1680

22

H/L

1

0

1

1

0

340

1020

13

565

1695

22

345

1035

13

570

1710

22

350

1050

13

575

1725

22

355

1065

14

H/L

01110

580

1740

22

360

1080

14

585

1755

23

H/L

1

0

1

1

1

365

1095

14

590

1770

23

370

1110

14

595

1785

23

375

1125

14

600

1800

23

380

1140

14

605

1815

23

385

1155

15

H/L

01111

610

1830

24

H/L

1

1

0

0

0

390

1170

15

615

1845

24

395

1185

15

620

1860

24

400

1200

15

625

1875

24

405

1215

15

630

1890

24

410

1230

16

H/L

10000

635

1905

25

H/L

1

1

0

0

1

415

1245

16

640

1920

25

420

1260

16

645

1935

25

425

1275

16

650

1950

25

430

1290

16

655

1965

25

435

1305

17

H/L

10001

660

1980

26

H/L

1

1

0

1

0

440

1320

17

665

1995

26

445

1335

17

670

2010

26

450

1350

17

675

2025

26

455

1365

17

680

2040

26

460

1380

18

H/L

10010

685

2055

27

H/L

1

1

0

1

1

465

1395

18

690

2070

27

470

1410

18

695

2085

27

475

1425

18

700

2100

27

480

1440

18

705

2115

27

485

1455

19

H/L

10011

710

2130

28

H/L

1

1

1

0

0

490

1470

19

715

2145

28

495

1485

19

720

2160

28

500

1500

19

725

2175

28

Table 1 - Decode Frequency Data