ams AG AS3932 애플리케이션 노트 - 페이지 7
{카테고리_이름} ams AG AS3932에 대한 애플리케이션 노트을 온라인으로 검색하거나 PDF를 다운로드하세요. ams AG AS3932 8 페이지. 3d low frequency wakeup receiver
페이지 인쇄Application Note AS3932 - Migration from ATA5283 (1-channel) to AS3932
signal is detected). The minimum duration of the carrier burst is 360us for AS3932. To wake the AS3932 up, no
"start gap" is needed, as shown in the figure 3-2.
Figure 3-2: AS3932 wakeup protocol description
The procedure to set up the AS3932 working in this way is described below.
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Send the preset_default direct command
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Write in the register R0<7:0> 02 (HEX) This ensures that Channel 2 and Channel 3 are disabled in order to
reduce the current consumption.
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Write R1<7:0> 21 (HEX) in case the crystal oscillator is used or write R1<7:0> 20 (HEX) if the RC oscillator is
used. In this way the wakeup will occur only based on frequency detection.
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Set the envelop detector time constant (R3<2:0>) according to the used bit rate (see p. 20 of AS3932 data
sheet).
Version 1.0, Date: 20/02/2009
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