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參數(shù)資料
| 型號： | AK2303LV |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:15; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:14; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:14-15 RoHS Compliant: No |
| 中文描述： | 雙交換機(jī)的PCM編解碼器的模擬線路卡 |
| 文件頁數(shù)： | 16/41頁 |
| 文件大小： | 559K |
| 代理商： | AK2303LV |
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ASAHI K ASEI
[AK 2303LV]
RESET
Power on Reset
AK2303LV automatically generates the internal reset pulse which resets all the circuit that is necessary to start the
initialization after the power on reset. The CPU registers are set to the default value.
After the internal reset pulse is generated, CODEC Ch0/Ch1 starts the initialization procedure by being fed FS signal, and it
takes 180ms( typ.), 350ms(max) to complete the initialization after the detection of power on.
Power up slope to enable the Power-on Reset
When power-up slope is no longer than 50ms(=5tau:tau is time constant), Power On Reset works normally.
When the time is longer than 50ms, Power On Reset is not activated and no internal registers are initialized. In
this case all registers must be written through CPU interface.
NOTE) For stable operation after power up, we recommend to write all register value through CPU interface after power up.
Recommended start up procedure
The following start up procedure is recommended when AK2303LV is going to power up.
- FS=”L”
- BCLK=”L”
- MUTE 0/1=”L”
When 1stFS and BCLK are set to “L”, CODEC
ch0,ch1 dose not interface with external
devices.
*In case of VDD rising time
=50ms(=5tau)
2303-E -00 16 2001/09
Power up
Write data to the internal
register through serial I/F
Supply FS and BCLK
- Write data to the internal register
before CODEC starts working.
Wait 200ms
- CODEC Initialization starts.
Wait 130ms
- CODEC Initialization complete.
- MUTE 0/1=”H”
CODEC starts working
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