参数资料
型号: MAS3549F
厂商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分类: Codec
英文描述: MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
中文描述: 新加坡金融管理局35x9F的MPEG 2 / 3层,AAC音频解码器,G.729的附件A编解码器
文件页数: 79/92页
文件大小: 1186K
代理商: MAS3549F
DATA SHEET
MAS 35x9F
Micronas
June 30, 2004; 6251-505-1DS
79
4.6.2.7. PIO as Parallel Input Interface:
Program Download Mode
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.
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.
Fig. 4–29:
PIO program download mode timing
Table 4–11:
PIO Program Download Mode timing
Symbol
Pin
Min.
Max.
Unit
t
0
RTR, PCS
0
μ
s
t
1
PCS
150
ns
t
2
PCS, RTR
0
30
ns
t
3
RTR
0.4
5
μ
s
t
4
PI
50
ns
t
5
PI
50
ns
RTW
PIxx
PCS
t
3
t
0
t
1
t
2
t
4
t
5
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