ml7041 Oki Semiconductor, ml7041 Datasheet - Page 23

• Manufacturer Part Number: ml7041
• Description: Audio Codec
• Manufacturer: Oki Semiconductor

CR4 (Tone generator operating mode and frequency select)
OKI Semiconductor
(a) B7 = 1 (DTMF tone)
(b) B7 = 0 (Other tones)
CR4
Initial Value
B7........................... DTMF or other tones select
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)
B4
B4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
*
*
*
*
*
*
*
*
B3
B3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
B2
B2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Others SEL
DTMF/
B1
B1
0
0
1
1
0
0
1
1
B7
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
B0
B0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Table 5-1 Tone Generator Frequency Settings
Table 5-2 Tone Generator Frequency Settings
TONE
SEND
B6
697 Hz + 1209 Hz
697 Hz + 1336 Hz
697 Hz + 1477 Hz
697 Hz + 1633 Hz
770 Hz + 1209 Hz
770 Hz + 1336 Hz
770 Hz + 1477 Hz
770 Hz + 1633 Hz
2730 Hz/2500 Hz
2000 Hz/2667 Hz
1000 Hz/1333 Hz
0
8 Hz wamb.
8 Hz wamb.
8 Hz wamb.
Frequency
Frequency
1000 Hz
400 Hz
440 Hz
480 Hz
667 Hz
800 Hz
B5
—
0
TONE4
B4
B4
B4
0
*
*
*
*
*
*
*
*
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
B3
B3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
TONE3
0: Others
B3
*Undefined
B2
B2
0
0
0
0
0
0
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
B1
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
TONE2
B2
B0
B0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
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
TONE1
B1
Frequency
Frequency
0
1200 Hz
1300 Hz
1477 Hz
1633 Hz
2000 Hz
2100 Hz
2400 Hz
2500 Hz
2700 Hz
3000 Hz
1: DTMF
FEDL7041-04
TONE0
B0
ML7041
0
23/28