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73M2921 Datasheet(PDF) 21 Page - List of Unclassifed Manufacturers

Part # 73M2921
Description  Advanced Single Chip Modem
PDF  41 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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73M2921 Datasheet(HTML) 21 Page - List of Unclassifed Manufacturers

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73M2921
Advanced Single
Chip Modem
February 99 Rev M
TDK Semiconductor
Page 21 of 41
DTMF DETECT REGISTER
ADDRESS: 04h (04d, 00100b)
MODE: CALL PROGRESS
BIT D7
BIT D6
BIT D5
BIT D4
BIT D3
BIT D2
BIT D1
BIT D0
Det. Valid
RES.
RES.
RES.
DTDET
3
DTDET
2
DTDET
1
DTDET
0
BIT NO.
NAME
CONDITION
DIGIT
DESCRIPTION
D3, D2, D1, D0
DTMF
Detect 3-0
D3
D2
D1
D0
00
0
1
00
1
0
00
1
1
01
0
0
01
0
1
01
1
0
01
1
1
10
0
0
10
0
1
10
1
0
10
1
1
11
0
0
11
0
1
11
1
0
11
1
1
00
0
0
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
Detects 697 Hz & 1209 Hz
Detects 697 Hz & 1336 Hz
Detects 697 Hz & 1477 Hz
Detects 770 Hz & 1209 Hz
Detects 770 Hz & 1336 Hz
Detects 770 Hz & 1477 Hz
Detects 852 Hz & 1209 Hz
Detects 852 Hz & 1336 Hz
Detects 852 Hz & 1477 Hz
Detects 941 Hz & 1336 Hz
Detects 941 Hz & 1209 Hz
Detects 941 Hz & 1477 Hz
Detects 697 Hz & 1633 Hz
Detects 770 Hz & 1633 Hz
Detects 852 Hz & 1633 Hz
Detects 941 Hz & 1633 Hz
D4, D5, D6
Reserved
Reserved for future use
D7
Valid
DTMF
Detect
1
0
Indicates a valid DTMF detection
Indicates no detect for polled applications



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