Hi,
unfortunately, our first custom board with a member of the i.MX RT family does not work. We have a 24 MHz crystall at the oscillator pins.
At the oscillator output XTALO is only a DC signal with about 1.11 V and no oscillation.
What can be the cause and needs to be checked?
Thanks & Regards,
Thomas
Solved! Go to Solution.
Hi,
Please refer RT1060 hardware design guide, the Table 4 provide some guideline about 24MHz oscillator circuit design.
The voltage should be ok: The logic level of this forcing clock must not exceed the NVCC_PLL (1.1V) level.
Load capacitor must chosse properly to align with crystal spec specified.
Bias XTALI with a 2.2 M resistor to GND.
Mount the resistor close to the XTALI ball.
Wish it helps.
Mike
Hi,
Please refer RT1060 hardware design guide, the Table 4 provide some guideline about 24MHz oscillator circuit design.
The voltage should be ok: The logic level of this forcing clock must not exceed the NVCC_PLL (1.1V) level.
Load capacitor must chosse properly to align with crystal spec specified.
Bias XTALI with a 2.2 M resistor to GND.
Mount the resistor close to the XTALI ball.
Wish it helps.
Mike
Hi,
now the oscillator runs after placing a 4.7uF capacitor at VDD_SNVS_CAP.
Thanks
Thomas