
22/26
Semiconductor
MSM7590L-01
(5) CR4 (Tone genereator operating mode and frequency select)
(b) B7 = 0 (Other tones)
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+ and SAO–
B4, B3, B2, B1, B0 ... Tone frequency setting, referred to Table-5-1 and 5-2.
(a) B7 = 1 (DTMF tone)
Table-5-2
Table-5-1
*Unrelated
B0
B1
B2
B3
B4
B5
SAO/
VFRO
0
B6
TONE
SEND
0
B7
TONE0
TONE1
TONE2
TONE3
TONE4
DTMF/OTHERS
SEL
0
0
0
0
0
0
CR4
Initial Value
B4
*
*
*
*
*
*
*
*
B3
0
0
0
0
0
0
0
0
B2
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
B0
0
1
0
1
0
1
0
1
Frequency
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
B4
*
*
*
*
*
*
*
*
B3
1
1
1
1
1
1
1
1
B2
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
B0
0
1
0
1
0
1
0
1
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
B4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
B3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
B2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
B0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Frequency
1k/1333 Hz, 16 Hz wamb.
800/667 Hz, 16 Hz wamb.
800/1k Hz,16 Hz wamb.
500/667 Hz,16 Hz wamb.
500/400 Hz,16 Hz wamb.
800/1k Hz, 8 Hz wamb.
500/400 Hz, 8 Hz wamb.
400 Hz,16 Hz wamb.
400 Hz,20 Hz wamb.
400 Hz Single tone
425 Hz Single tone
440 Hz Single tone
450 Hz Single tone
800 Hz Single tone
1000 Hz Single tone
1300 Hz Single tone
B4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
B3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
B2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
B0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Frequency
2000 Hz Single tone
2042 Hz Single tone
2514 Hz Single tone
500 Hz Single tone
667 Hz Single tone
1333 Hz Single tone
2100 Hz Single tone
—
—
—
—
—
—
—
—
—