Designing for Low Power and Estimating Battery Life for BLE Applications

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Document No. 001-92584 Rev. *A

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Figure 5. Deep Sleep Setting for BLE Component

Stop Mode

If you are using the Stop mode in your application, make sure that the WAKEUP pin is configured correctly to exit the

Stop mode successfully:

1.

Configure P2.2 as the WAKEUP pin.

2.

Set the WAKEUP pin active HIGH or active LOW as required by your application.

Setting the WAKEUP pin to the configured level will cause the device to wake up from the Stop mode. The WAKEUP

pin is active LOW by default.

SWD Pin Configuration

SWD pins are used for runtime firmware debug during development stages. Configuring the SWD pins for debug

increases the current consumption. Therefore, in the production release, SWD pins should be switched to the GPIO

mode. They will still be available for programming the device upon chip reset.

1.

Go to the System tab in the .cydwr file.

2.

Click Debug Select under Programming\Debugging, as shown in Figure 6.

3.

Change the value to GPIO.