CMX605 Просмотр технического описания (PDF) - MX-COM Inc

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CMX605

Digital Line to POTS Interface

MX-COM Inc  

Digital Line to POTS Interface

Page 6 of 26

CMX605 Preliminary Information

4.3 Tone/FSK Encoder and Tone Encoder

When bit 5 of the MODE Register is set to ‘1’ then these blocks generate FSK signals as determined by bit 0

of the SETUP Register and the Tx data bits from the UART block, as shown in Table 3.

SETUP Register

Bit 0

0

1

Tone/FSK Generator

V23 1200bps FSK

Bell 202 1200bps FSK

FSK Signal Frequency

‘0’ (Space)

2100Hz

2200Hz

FSK Signal Frequency

‘1’ (Mark)

1300Hz

1200Hz

Table 3: Tone/FSK Encoder and Tone Decoder

When bit 5 of the MODE Register is set to ‘0’, these blocks generate single or dual tones from the range

shown in Table 4, Table 5, Table 6, and Table 7. Bit 6 of the MODE Register is then used to enable or disable

the block’s output to the Tx Signal Control, RING, and ToneFSK outputs. There are four tone fields

addressed by bits 0 and 1 of the MODE Register.

TX TONES Register Bits 4-7

D7

D6

D5 D4

0

0

0

0

0

0

0

1

0

0

1

0

0

0

1

1

0

1

0

0

0

1

0

1

0

1

1

0

0

1

1

1

1

0

0

0

1

0

0

1

1

0

1

0

1

0

1

1

1

1

0

0

1

1

0

1

1

1

1

0

1

1

1

1

Frequency

(Hz)

0 = OFF

252.4

268.7

285.3

315.5

330.5

375.2

404.3

468.0

495.8

520.6

548.0

562.8

578.4

595.0

612.5

TX TONES Register Bits 0-3

D3

D2

D1

D0

0

0

0

0

0

0

0

1

0

0

1

0

0

0

1

1

0

1

0

0

0

1

0

1

0

1

1

0

0

1

1

1

1

0

0

0

1

0

0

1

1

0

1

0

1

0

1

1

1

1

0

0

1

1

0

1

1

1

1

0

1

1

1

1

Frequency

(Hz)

0 = OFF

* 17.1

* 20.5

* 24.9

* 34.1

* 41.0

* 51.2

-

262.9

293.6

348.2

392.6

1600

1633

1827

587.2

Table 4: Tone Field 0, MODE Register bit 1 and bit 0 = ‘0’ and ‘0’ respectively.

NOTE: * These outputs are routed to the RING digital output instead of the TONEFSK output. Any single

tone output level at TONEFSK output is 0dBm.

¤2001 MX-COM, Inc.

www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054

Doc. # 20480195.005

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

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