MEMS oscillator for ECO clock on CY8C4248LQI-BL583

[olto]

Hi,

I have a board with a CY8C4248LQI-BL583. Instead of a crystal  a MEMS oscillator (Jauch O 24,000000-JSO21 C1 LC-D-2V3-T3-S-D) is used for the high frequency signal. The output from the crystal is connected to the XTAL24I pin. The XTAL24O pin is floating.

How can I disable, or at least minimize the gain, of the amplifier in the ECO circuit?

I could be wrong, but I suspect that the open amplifier circuit is causing the device to behave unreliably at elevated temperatures.

//Olle

[Owen_Zhang123 · Accepted solution]

For the psoc4 device, there is an EXTCLK for oscillator input. But it is only for non-BLE application.

For BLE application, you must use the ECO clock. But it doesn't support for oscillator input.