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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  
EFRAMEDATA register address $38  
15  
Type  
14  
13  
X
12  
X
11  
10  
Data  
9
8
7
6
5
4
3
2
Data  
1
0
This read-only register contains extra information about the last 20ms frame of audio that was  
encoded. The data in this register becomes valid after bit 1 in the STATUS register ($40) is set.  
The data will remain valid until the next 20ms frame of audio has been encoded.  
The Vocoder can produce frames containing either voice, DTMF, or single tones depending on  
which bits are set in the VCTRL register ($11). If the Vocoder is set up to detect DTMF and/or  
single tones in the audio stream, the DTMF code or the single tone frequency will be reported in  
this register.  
Bits 0 to 11  
Data  
This field contains either the DTMF code (bits 0 to 3) or the single tone frequency  
that was detected in the audio stream  
Bits 12 to 13 Reserved. The value of these two bits should be ignored.  
Bits 14 to 15 This field indicates what sort of data is contained in the data field, as shown in the  
Type  
table below:  
Bit 15  
Bit 14  
Data Type  
0
0
0
1
The frame is encoded audio. The data field should be ignored.  
The frame contains DTMF. The data field contains the DTMF code in bits 0 to  
3 (bit 3 is the msb). If the device is sending DTMF frames as a result of writing  
to the SDTMF register, bits 4 to 7 contain the remaining count of DTMF  
frames to be sent. If the device is sending DTMF frames as a result of  
detecting DTMF in the audio stream, all the other bits should be ignored.  
The format of the DTMF data is specified by bit 7 (DTMFF) of the VCFG  
register ($07).  
Please refer to section 6.2 for the DTMF bit patterns.  
1
1
0
1
The frame contains a single tone. The data field contains the single tone's  
frequency in Hz. The frequency value has a resolution of 32Hz and bit 11 is  
the msb.  
Not used.  
2014 CML Microsystems Plc  
52  
D/608_18_38/11  
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