Crystal used in PSOC4-142 Module Kit

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AMSH_1344256
Level 1
Level 1

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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Bob_Marlowe
Level 10
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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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Bob_Marlowe
Level 10
Level 10
First like given 50 questions asked 10 questions asked

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
Level 1
Level 1

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

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