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MAS9191A Datasheet(PDF) 25 Page - Micro Analog systems

Part # MAS9191A
Description  Single Chip AMPS/ETACS/NAMPS Audio/Data Processor
PDF  36 Pages
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Manufacturer  MAS [Micro Analog systems]
Direct Link  http://www.mas-oy.com
Logo MAS - Micro Analog systems

MAS9191A Datasheet(HTML) 25 Page - Micro Analog systems

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25
DA9191A.000
July 31, 1997
FUNCTIONS
Register 04HEX (bits 7-4 write only, bits 3-0 read only)
Bit
Name
State
Function
3-0
DTMF[3:0]
0001
‘1’ Tone detected
0010
‘2’ Tone detected
0011
‘3’ Tone detected
0100
‘4’ Tone detected
0101
‘5’ Tone detected
0110
‘6’ Tone detected
0111
‘7’ Tone detected
1000
‘8’ Tone detected
1001
‘9’ Tone detected
1010
‘0’ Tone detected
1011
‘*’ Tone detected
1100
‘#’ Tone detected
1101
‘A’ Tone detected
1110
‘B’ Tone detected
1111
‘C’ Tone detected
0000
‘D’ Tone detected
6-4
Vref[2:0]
Internal reference voltage adjustment
000
+0.75dB
001
+0.50dB
010
+0.25dB
011
0.00dB default value
100
-0.25dB
101
-0.50dB
110
-0.75dB
111
-1.00dB
7
reserved
0
reserved for future use, set to 0
Register 05HEX (write only)
Bit
Name
State
Function
5-0
LOWF[5:0]
00H-3FH
Transmitted low frequency DTMF tone
Nominal
Real frequency
000000
No signal
No signal
100110
697 Hz
695.8 Hz
101010
770 Hz
769.0 Hz
101111
852 Hz
860.6 Hz
110011
941 Hz
933.8 Hz
7-6
reserved
00
reserved for future use, set to 0



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