FEDL7732-01-10

OKI Semiconductor

MSM7732-01

21/29

CR4 (Tone generator operating mode and frequency select)

B7

B6

B5

B4

B3

B2

B1

B0

CR4

DTMF/

TONE

SEND

SAO/

VFRO

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 …………………… Tone output pin select (receive side); 0/VFRO, 1/SAO

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

(a) B7 = 1 (DTMF tones)

Table 5-1

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

1

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

B4

B3

B2

B1

B0

Frequency

B4

B3

B2

B1

B0

Frequency

0

0

0

0

0

2730 Hz/2500 Hz

8 Hz wamble

1

0

0

0

0

1200 Hz

0

0

0

0

1

2000 Hz/2667 Hz

8 Hz wamble

1

0

0

0

1

1300 Hz

0

0

0

1

0

1000 Hz/1333 Hz

8 Hz wamble

100

1

0

—

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