DA9191A.000
July 31, 1997
The register value for other frequencies may be calculated with the formula: LG[5:0] = (fOUT * 217) / 2.4MHz.
FUNCTIONS
Register 06HEX (write only)
Bit
Name
State
Function
7-0
HIGHF[7:0]
00H-FFH
Transmitted high frequency DTMF tone
Nominal
Real frequency
No signal
00000000
01000010
01001001
01010001
01011001
No signal
1209 Hz
1336 Hz
1477 Hz
1633 Hz
1208.5 Hz
1336.7 Hz
1483.2 Hz
1629.6 Hz
The register value for other frequencies may be calculated with the formula: HG[7:0] = (fOUT * 217) / 2.4MHz.
Register 07HEX (write only)
Bit
Name
State
Function
0
DTMFTP
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DTMF transmitter in power down
DTMF transmitter active
DTMF receiver in power down
DTMF receiver active
AUDIO in power down
AUDIO active
Digital TX section in power down
Digital TX section active
Digital RX section in power down
Digital RX section active
DAC1 in power down
DAC1 active
1
2
3
4
5
6
7
DTMFRP
AUDIOP
TXSIP
RXSIP
XPDDAC1
XPDDAC2
XPDDAC3
DAC2 in power down
DAC2 active
DAC3 in power down
DAC3 active
26
MAS [ MICRO ANALOG SYSTEMS ]
