Wake Up PSoC 6 MCU Device from Deep Sleep Through EZI2C Slave Address Match – KBA227480

Version 4

    Author: ShanmathiN_06           Version: **


    Translation - Japanese: PSoC 6 MCU デバイスを EZI2C スレーブアドレスマッチでディープスリープから復帰する - KBA227480- Community Translated (JA)


    The SCB_EZI2C_PDL Component can wake up the device from Deep Sleep mode on a Slave address match. To enable this functionality, select the Enable Wakeup from Deep Sleep Mode parameter. Figure 1 shows the PSoC Creator 4.2 configuration settings Figure 2 shows the ModusToolbox configurator settings.


    Figure 1. PSoC Creator 4.2 Configuration Settings


    Figure 2. ModusToolbox Device Configurator settings


    NOTE: Only one of the available SCBs is Deep Sleep capable. You can refer to the Pinouts section: Multiple alternate functions table of PSoC 6 datasheet, where the SCB with Deep Sleep functionality is listed under the DS (Deep Sleep) column.

    Perform these steps to register the Deep Sleep callback function using the cy_syspm driver before entering Deep Sleep.

    1. Define the cy_stc_syspm_callback_params_t structure reference with the following data fields.

    • void* cy_stc_syspm_callback_params_t::baseBase address of a HW instance. Matches the driver name in the API for the base address.


    • void* cy_stc_syspm_callback_params_t::context -> Context for the handler function if your callback routine needs access to the context. Else, this item is defined as NULL.

    2. Define the cy_stc_syspm_callback_t structure reference with the following data fields.

    • Cy_SysPmCallback cy_stc_syspm_callback_t::callback -> The callback handler function (Cy_SCB_EZI2C_DeepSleepCallback)


    • cy_en_syspm_callback_type_t cy_stc_syspm_callback_t::type -> The Deep Sleep enum callback type (CY_SYSPM_DEEPSLEEP)


    • uint32_t cy_stc_syspm_callback_t::skipMode -> The mask of modes to be skipped during callback execution.


    • cy_stc_syspm_callback_params_t* cy_stc_syspm_callback_t::callbackParamsThe address of cy_stc_syspm_callback_params_t; the callback is executed with these parameters.


    • struct cy_stc_syspm_callback* cy_stc_syspm_callback_t::prevItm -> The previous list item. This element is defined as NULL.


    • struct cy_stc_syspm_callback* cy_stc_syspm_callback_t::nextItm -> The next list item. This element is defined as NULL.


    3. Register the callback function using Cy_SysPm_RegisterCallback (cy_stc_syspm_callback_t * handler).


    4. Use Cy_SysPm_CpuEnterDeepSleep (CY_SYSPM_WAIT_FOR_INTERRUPT) to enter Deep Sleep. The PSoC 6 MCU device wakes up when an EZI2C address match occurs.


    See the PDL documentation for more information[BV1] on the structures and APIs.



    Code snippet:

    cy_stc_syspm_callback_params_t Cy_SCB_EZI2C_DeepSleepCallback_param =






    cy_stc_syspm_callback_t Cy_SCB_EZI2C_DeepSleepCallback_elements =











    int main(void)


       if (true != Cy_SysPm_RegisterCallback(&Cy_SCB_EZI2C_DeepSleepCallback_elements))


            /* Insert error handling */





            /* Insert error handling */