ML7041 데이터 시트보기 (PDF) - Unspecified

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ML7041

Audio CODEC

Unspecified 

FEDL7041-05

ML7041

CR4 (Tone generator operating mode and frequency select)

CR4

Initial Value

B7

DTMF/

Others SEL

0

B6

TONE

SEND

0

B5

B4

B3

B2

B1

B0

—

TONE4 TONE3 TONE2 TONE1 TONE0

0

0

0

0

0

0

B7 ............................DTMF or other tones select

0: Others

1: DTMF

B6 ............................Tone transmit enable (Transmit side) 0: Voice signal transmit 1: Tone transmit

B5 ............................Not used. When writing data, write “0”.

B4, B3, B2, B1, B0 ..Tone frequency setting (refer to Tables 5-1 and 5-2)

(a) B7 = 1 (DTMF tone)

Table 5-1 Tone Generator Frequency Settings

B4 B3 B2 B1 B0

Frequency

B4 B3 B2 B1 B0

* 0000

697 Hz + 1209 Hz

* 1000

* 0001

697 Hz + 1336 Hz

* 1001

* 0010

697 Hz + 1477 Hz

* 1010

* 0011

697 Hz + 1633 Hz

* 1011

* 0100

770 Hz + 1209 Hz

* 1000

* 0101

770 Hz + 1336 Hz

* 1101

* 0110

770 Hz + 1477 Hz

* 1110

* 0111

770 Hz + 1633 Hz

* 1111

*Undefined

Frequency

852 Hz + 1209 Hz

852 Hz + 1336 Hz

852 Hz + 1477 Hz

852 Hz + 1633 Hz

941 Hz + 1209 Hz

941 Hz + 1336 Hz

941 Hz + 1477 Hz

941 Hz + 1633 Hz

(b) B7 = 0 (Other tones)

Table 5-2 Tone Generator Frequency Settings

B4 B3 B2 B1 B0

Frequency

B4 B3 B2 B1 B0

00000

2730 Hz/2500 Hz

8 Hz wamb.

10000

00001

2000 Hz/2667 Hz

8 Hz wamb.

10001

00010

1000 Hz/1333 Hz

8 Hz wamb.

10010

00011

—

10011

00100

—

10100

00101

—

10101

00110

—

10110

00111

—

10111

01000

—

11000

01001

400 Hz

11001

01010

440 Hz

11010

01011

480 Hz

11011

01100

—

11100

01101

667 Hz

11101

01110

800 Hz

11110

01111

1000 Hz

11111

Frequency

1200 Hz

1300 Hz

1477 Hz

1633 Hz

2000 Hz

2100 Hz

2400 Hz

2500 Hz

2700 Hz

3000 Hz

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