UV-K5 CPU sleep mode under 1mA

[RedsEngineering]

Hi All,

I'm working on an integration project and I need to be able to put the CPU in the UV-K5 in sleep mode and wake up on PTT signal. I'd like to get the power consumption below 1mA if possible.

Currently I'm using the following code to put the receiver to sleep in my custom firmware:

BK4819_DisableVox();
BK4819_Sleep();
BK4819_ToggleGpioOut(BK4819_GPIO0_PIN28_RX_ENABLE, false);

This gets me down to 4.8mA power consumption but the CPU is still running. The specs on the processor mention that it can be placed in sleep mode, with wake on external interrupt. Is there an underlaying function in the code to do this?

Any ideas would be greatly appreciated.

-Red