参数资料
型号: MAS3519F
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: 19/92页
文件大小: 1186K
代理商: MAS3519F
DATA SHEET
MAS 35x9F
Micronas
June 30, 2004; 6251-505-1DS
19
2.11.2.1.Important Advice for Turn-on and Operat-
ing Voltage
Before the 2.2 V are programmed at the DCDC con-
verter, DSP+Codec must be enabled.
Operating and Turn-Off is possible down to 2.2 V.
The sequence should be similar to the following:
1. Start DCDC
2. Set DCDC to 2.5 V
Turn on DSP+Codec
Write App-Select memory cell
Read App-Running Mem cell
If okay: Set DCDC to 2.2 V
Set other mem cells
Set other codec registers
.....
3. Demute...send data
4. Mute...stop data.....loop "3)" "4)"...
5. Turn off DSP+Codec
goto "2)"
etc.....
The signal at pin PUP will return to low only when both
PUPn flags (I
2
C subaddress 76
hex
) have returned to
zero. Care must be taken when changing both DC/DC
output voltages to higher values. In this case, both out-
put voltages are momentarily insufficient to keep the
PUPn flags up; the resulting dip in the signal at the
PUP pin may, in turn, reset the microcontroller. To
avoid this condition, only one DC/DC output voltage
should be changed at a time. Before modifying the
second voltage, the microcontroller must wait for the
PUPn flag of the first voltage to be set again.
If only DC/DC converter 1 is used, the reference volt-
age of the second, unused converter should be set to
a lower value than that of converter 1, and its pin
VSENS2 should be connected to VDD.
The operating mode pulse width modulation, or pulse
frequency modulation, are controlled at I
2
C subad-
dress 76
hex
, the operating frequency at I
2
C subad-
dress 77
hex
.
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MAS3529F 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
MAS3539F 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
MAS3549F 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
MAS3559F 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
MAS3587F 制造商:未知厂家 制造商全称:未知厂家 功能描述:MPEG Layer 3 Audio Encoder/Decoder