AN92584 Datasheet, PDF (8/42 Pages) Ramtron International Corporation – Designing for Low Power and Estimating Battery Life for BLE Applications

Designing for Low Power and Estimating Battery Life for BLE Applications
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.
www.cypress.com
Document No. 001-92584 Rev. *A
8