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MAS3549F 参数 Datasheet PDF下载

MAS3549F图片预览
型号: MAS3549F
PDF下载: 下载PDF文件 查看货源
内容描述: MAS 35x9F MPEG 2/3层, AAC音频解码器, G.729附录编解码器 [MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec]
分类和应用: 解码器编解码器
文件页数/大小: 92 页 / 1187 K
品牌: MICRONAS [ MICRONAS ]
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DATA SHEET  
MAS 35x9F  
4.3.6.1. PIO Handshake Lines  
PCS  
The PIO chip select PCS must be set to ‘0’ to activate  
the PIO in operation mode.  
specification are used in conjunction with download  
software only. A switch at D0:ff6 selects one of these  
pins at a time. The SPDIR pin is a common reference  
for both input lines (see Fig. 5–1 on page 89).  
IN  
PR  
IN  
4.3.11. S/PDIF Output Interface  
Pin PR must be set to ‘1’ to validate data output from  
MAS 35x9F PIO pins.  
SPDO  
OUT  
The SPDO pin provides an digital output with standard  
CMOS level that is compliant to the IEC 958 consumer  
specification.  
PRTR  
OUT  
Ready to read. This signal indicates that the  
MAS 35x9F is able to receive data in PIO input mode.  
PRTW  
OUT  
4.3.12. Analog Input Interfaces  
Ready to write. This pin indicates that MAS 35x9F has  
data available for PIO output mode.  
In the standard MPEG-decoding DSP firmware the  
analog inputs are not used. However, they can be  
selected as a source for the D/A converters  
EOD  
OUT  
EOD indicates the end of an DMA cycle in the IC’s PIO  
input mode. In ’serial’ input mode it is used as Demand  
signal, that indicates that new input data are required.  
(set MIX ADC scale of the D/A Converter Source  
Mixer, Register 00 06  
in Table 3–16).  
hex  
MICIN  
MICBI  
IN  
IN  
4.3.7. Serial Input Interface (SDI)  
The MICIN input may be directly used as electret  
microphone input, which should be connected as  
described in application information (see Fig. 5–1 on  
page 89). The MICBI signal provides the supply volt-  
age for these microphones.  
SID  
SII  
DATA  
WORD STROBE  
CLOCK  
IN/OUT  
IN/OUT  
IN/OUT  
SIC  
2
I S compatible serial interface A for digital audio data.  
In the standard firmware this interface is not used.  
Note: Please refer to Bit [0] of Table 3–5  
INL  
INR  
IN  
IN  
INL and INR are analog line-in input lines. They are  
connected to the embedded stereo A/D converter of  
the MAS 35x9F. The sources should be AC-coupled.  
The reference ground for these analog input pins is the  
VREF pin.  
4.3.8. Serial Input Interface B (SDIB)  
SIBD  
SIBI  
DATA  
WORD STROBE  
CLOCK  
IN  
IN  
IN  
SIBC  
The serial interface B is primarily used as bitstream  
input interface. The SIBI line must be connected to  
VSS in the standard application.  
4.3.13. Analog Output Interfaces  
OUTL  
OUTR  
OUT  
OUT  
OUTL and OUTR are left and right analog outputs, that  
may be directly connected to the headphones as  
described in the application information (see Fig. 5–1  
on page 89).  
4.3.9. Serial Output Interface (SDO)  
SOD  
SOI  
SOC  
DATA  
WORD STROBE  
CLOCK  
OUT  
OUT  
IN/OUT  
FILTL  
FILTR  
IN  
IN  
Data, Frame Indication, and Clock line of the serial  
output interface. The SOI is reconfigurable and can be  
Connection to input terminal of output amplifier.Can be  
used to connect a capacitance from OUTL respectively  
OUTR to FILTL respectively FILTR in parallel to feed-  
back resistor and thus implement a low pass filter to  
reduce the out-of-band noise of the DAC.  
2
adapted to several I S compliant modes.  
4.3.10. S/PDIF Input Interface  
SPDI1  
SPDI2  
SPDIR  
IN  
IN  
IN  
SPDIF1 and SPDIF2 are alternative input pins for  
S/PDIF sources according to the IEC 958 consumer  
Micronas  
June 30, 2004; 6251-505-1DS  
61  
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