MAS9191AJ MAS [Micro Analog systems], MAS9191AJ Datasheet - Page 25

• Manufacturer Part Number: MAS9191AJ
• Description: Single Chip AMPS/ETACS/NAMPS Audio/Data Processor
• Manufacturer: MAS [Micro Analog systems]

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