How do I change my power modes in ADE7878? I find problems when handling data in different power modes. How do I manage them?
In ADE7878, there are 4 power modes PSM0, PSM1, PSM2 and PSM3. The bits in the PM registers (PM1 and PM0) can set the corresponding power mode. Refer to the Table 9 in the datasheet to set the bits in the registers accordingly. The common mistake that one might commit while handling power modes, is trying to take readings from the chip when it is still in sleep mode. Though it is easy to miss this step, it has to be remembered that the IC has to be brought back to either of PSM0, PSM1 or PSM2 modes before performing any other operations. There are various reasons and advantages for operating the IC in each of these modes, which are elaborated in the Power Management section of the datasheet.
can i use only in PSMO mode always. ???
Yes. As long as the part is powered up and satisfies the requirement of PSM0 mode, it can be used in PSM0 mode always.
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