RN4871休眠模式怎么实现

一年多以前，TraveSmithPress发布了一个将RN861放入最低可能的电源模式休眠模式的程序，它只需要绘制1.7个UA。我终于成功地实现了这一点，但只有在意识到我认为不重要的最后一步的意义之后。由于我没有在最后设置RXJIN高，而不是绘制1.7uA，我的RN878绘制超过100UA。似乎RXYND通常在内部被拉到RN48 71。在我的申请中，我要么全权要么休眠，两者之间没有任何关系。所以我一直离开RXJIN低。但我认为RXIN内部的上拉必须是在我拉低电流的时候补充额外的电流。现在，当我在TraveSmith'步骤中遵循步骤6并设置RxJIN高时，在RN878的供电线路上的测量电流是1.5 UA。我进入休眠模式的程序是：1。发送“O，0  R”（“$$ $”是不需要的，因为我已经在命令模式。“0”是因为我不希望芯片对这个命令做出任何反应。2）。等待200毫秒。3。设置RXJIN高。当唤醒RN48的时候，我将BTYRead线脉冲发送到芯片并设置RXIN低，并进行通常的启动通信。



      以下为原文

    Over a year ago, traversjames posted a procedure for putting the RN4871 into the lowest possible power mode - dormant mode - which is supposed to draw only 1.7 uA.  I have finally succeeded in achieving that too, but only after realizing the significance of the last step that I didn't think was important.  Instead of drawing 1.7uA, my RN4871 was drawing over 100uA because I didn't set RX_IND high at the end.  It seems that RX_IND is normally pulled up internally to the RN4871.  In my application I want either full power or dormant, nothing in-between.  So I was leaving RX_IND low all the time.  But I think the internal pull-up on RX_IND must be sourcing the extra current when I pull it low.  Now when I follow step 6 in traversjames' steps and set RX_IND high, the measured current on the supply line to the RN4871 is 1.5 uA.  My procedure for going into dormant mode is now:

1. Send "O,0r"    (The "$$$" was not needed because I was already in command mode. The ",0" is because I don't want any response from the chip to this command.)
2. Wait 200 msec.
3. Set RX_IND high.

When it is time to wake up the RN4871, I pulse the BT_Reset line to the chip and set RX_IND low and do the usual boot-up communication.