FEDL7041-05

ML7041

23/28

CR4 (Tone generator operating mode and frequency select)

B7

B6

B5

B4

B3

B2

B1

B0

CR4

DTMF/

Others SEL

TONE

SEND

—

TONE4

TONE3

TONE2

TONE1

TONE0

Initial Value

0

0

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

Frequency

*

0

0

0

0

697 Hz + 1209 Hz

*

1

0

0

0

852 Hz + 1209 Hz

*

0

0

0

1

697 Hz + 1336 Hz

*

1

0

0

1

852 Hz + 1336 Hz

*

0

0

1

0

697 Hz + 1477 Hz

*

1

0

1

0

852 Hz + 1477 Hz

*

0

0

1

1

697 Hz + 1633 Hz

*

1

0

1

1

852 Hz + 1633 Hz

*

0

1

0

0

770 Hz + 1209 Hz

*

1

0

0

0

941 Hz + 1209 Hz

*

0

1

0

1

770 Hz + 1336 Hz

*

1

1

0

1

941 Hz + 1336 Hz

*

0

1

1

0

770 Hz + 1477 Hz

*

1

1

1

0

941 Hz + 1477 Hz

*

0

1

1

1

770 Hz + 1633 Hz

*

1

1

1

1

941 Hz + 1633 Hz

*Undefined

(b) B7 = 0 (Other tones)

Table 5-2 Tone Generator Frequency Settings

B4

B3

B2

B1

B0

Frequency

B4

B3

B2

B1

B0

Frequency

0

0

0

0

0

2730 Hz/2500 Hz

8 Hz wamb.

1

0

0

0

0

1200 Hz

0

0

0

0

1

2000 Hz/2667 Hz

8 Hz wamb.

1

0

0

0

1

1300 Hz

0

0

0

1

0

1000 Hz/1333 Hz

8 Hz wamb.

100

10

0

0

0

1

1

—

1

0

0

1

1

1477 Hz

0

0

1

0

0

—

1

0

1

0

0

1633 Hz

0

0

1

0

1

—

1

0

1

0

1

2000 Hz

0

0

1

1

0

—

1

0

1

1

0

2100 Hz

0

0

1

1

1

—

1

0

1

1

1

0

1

0

0

0

—

1

1

0

0

0

2400 Hz

0

1

0

0

1

400 Hz

1

1

0

0

1

0

1

0

1

0

440 Hz

1

1

0

1

0

2500 Hz

0

1

0

1

1

480 Hz

1

1

0

1

1

0

1

1

0

0

—

1

1

1

0

0

0

1

1

0

1

667 Hz

1

1

1

0

1

2700 Hz

0

1

1

1

0

800 Hz

1

1

1

1

0

0

1

1

1

1

1000 Hz

1

1

1

1

1

3000 Hz