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CMX608 参数 Datasheet PDF下载

CMX608图片预览
型号: CMX608
PDF下载: 下载PDF文件 查看货源
内容描述: [Integrated Input and Output Channel Filters]
分类和应用:
文件页数/大小: 70 页 / 3411 K
品牌: CMLMICRO [ CML MICROCIRCUITS ]
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RALCWI Vocoder  
CMX608/CMX618/CMX638  
Mode 1  
Mode 2  
The DTMF 4-bit number is detected from the DTMF data frame. The 4-bit code is made  
available in the DFRAMEDATA register ($37) and is also re-synthesized as a tone at the  
output. This mode is enabled by setting bits 5 and 6 in the VCTRL register ($11) to '1'.  
The DTMF 4-bit number is detected from the DTMF data frame. The 4-bit code is made  
available in the DFRAMEDATA register ($37) andsilence is output from the Codec. This  
mode is enabled by setting bit 5 in the VCTRL register ($11) to '1' and by setting bit 6 in the  
VCTRL register to '0'.  
The DTMF generators and detectors are provided so that commonly encountered tones can be  
reproduced naturally at the other end of a Vocoded link, rather than being interpreted as a form of speech.  
They should not be relied upon to provide an error free method of relaying tone signalling to other  
decoders, such as a telephone exchange DTMF detector, for example.  
5.7.3.  
DTMF Format  
The DTMF format is selected by bit 7 in the (Vocoder Configuration) VCFG register ($07), according to the  
following tables:  
Format 1 This format is used when bit 7 of the VCFG register ($07) is cleared to '0'.  
Bit 3  
0
Bit 2  
0
Bit 1  
0
Bit 0  
0
Symbol  
D
1
2
3
4
5
6
7
8
9
0
*
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
#
A
B
C
1
1
0
1
1
1
1
0
1
1
1
1
Table 2 DTMF - Format 1  
2014 CML Microsystems Plc  
27  
D/608_18_38/11  
 
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