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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  
4.6.2.7. PIO as Parallel Input Interface:  
Program Download Mode  
Table 4–11: PIO Program Download Mode timing  
Symbol Pin  
Min.  
0
Max.  
Unit  
µs  
Handshake for PIO input in Program Download  
Mode is accomplished through the RTR, PCS, and  
PI12..PI19 signal lines (see Fig. 4–29). The PR line  
should be set to low level.  
t
t
t
t
t
t
RTR, PCS  
PCS  
0
1
2
3
4
5
150  
0
ns  
PCS, RTR  
RTR  
30  
5
ns  
The MAS 35x9F will drive RTR low as soon as it is  
ready to receive a byte and RTR will stay low until one  
byte has been written. Writing of a byte is performed  
with a PCS pulse, driven by the microcontroller. The  
MAS 35x9F reads data after the falling edge of PCS  
and will finish the cycle by setting RTR to high level  
after the rising edge of PCS. The next data transfer is  
initialized by the MAS 35x9F by driving the RTR line.  
0.4  
50  
50  
µs  
PI  
ns  
PI  
ns  
t
t
t
t
0
1
2
3
RTW  
PIxx  
PCS  
t
t
4
5
Fig. 4–29: PIO program download mode timing  
Micronas  
June 30, 2004; 6251-505-1DS  
79  
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