CC1352P: Bootloader power consumption

Hi Martin,

What happens when you boot into an empty/cleared device is the following:

When the device resets, part of the boot procedure is to check if CCFG_IMAGE_VALID in CCFG contains a valid pointer, which is the flash image vector table. If the address is valid, then the boot procedure jumps to that address. However, if it is invalid then it jumps to the ROM bootloader. In the ROM bootloader it polls the serial ports for any incoming messages forever. In other words, in never goes into standby.

In order to put the device into sleep you need to flash the device with some minimal code. The simplest would be to use NoRTOS, which in main simply calls the Power driver to put it into shutdown state. Remember to configure the CCFG with the bootloader backdoor enabled, as I assume you are planning to use the bootloader to reprogram the device.

int main(void)
{
    // Any required board-specific initialization here.

    Power_init();
    Power_shutdown(0, 0);

    // Should never return
    while (1);
}