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PSoC 4 MCU

AMSH_1344256
New Contributor

Hi,
Why two nos. of crystals(one is 32Khz and another is 24Mhz) are required in CY8C-142 Module KIT.

   

If both are required for BLE feature or without these two BLE feature may be used?

   

regards

   

AMIT

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JoMe_264151
Expert II

The 24MHz crystal is for the BLE radio, CPU and peripherals and is absolutely required, while the 32KHz is for maintaining a stable low-speed clock which might not be required, but must be accounted for when deep-sleep power saving states are used to wake up the chip at a precise rate.

   

 

   

Bob

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2 Replies
JoMe_264151
Expert II

The 24MHz crystal is for the BLE radio, CPU and peripherals and is absolutely required, while the 32KHz is for maintaining a stable low-speed clock which might not be required, but must be accounted for when deep-sleep power saving states are used to wake up the chip at a precise rate.

   

 

   

Bob

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AMSH_1344256
New Contributor

Thanks Bob, it means to use BLE feature of PSoC4 we need to use 24MHz external crystal or TCXO.

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