[Manish]

Hi Neeraj,

The OSC0(Y1) I am using “YXC – YSX530GA 24MHZ 20PF 10PPM 2Pad SMD/SMT Crystal”. Values of C4 -20pF C6-20pF R33- 1M.
I have gone through the input clock requirements in AM335x datasheet. Is there any issue with the Load capacitance values C4 and C6. Can you guide me through on what values to be placed?
The OSC1(Y2) is “Q13FC1350000400” EPSON FC-135 32.768KHZ 12.5PF 20PPM 2Pad SMD/SMT Crystal.
The values of C8 & C9 are 12pF, R38 – 1M.
I am powering this board through USB, I have connected an external wire to increase the current carrying capacity as the inrush current is 1.5A.

If there is a problem due to load capacitance, Can you please guide me through selecting them.
Can you please suggest me the next steps to be followed in order to get my board working.

Thank you,
Manish

Attachments:

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   Capture1.png
   

[Manish]

Hi Neeraj,

Thank you for your response. The I2C address of the EEPROM has been configured appropriately.

Here are the voltage readings I observed:

• VDDS_DDR: 1.5V
• VDD_CORE: 1.1V
• VDD_MPU: 1.1V
• VDDS_PLL: 1.8V

Other voltage rails also appear to be within acceptable ranges.

Regarding the 24 MHz oscillator, I noticed there is no clock signal present when observed on the oscilloscope. It shows a constant high signal instead of an oscillating waveform.

Additionally, when monitoring the SD_CLK and CMD lines, there is no activity on either line. Both remain at a constant high signal, even when the SD card is inserted.

I managed to check part of the power sequence using the oscilloscope (50 MHz, 2-channel). Specifically, I monitored:

• Channel 1: SYS_RTC_1P8V
• Channel 2: SYS_VDD_1P8V

I am attaching an image of the observed power sequence. Since I am relatively new to using the oscilloscope.

I would appreciate your feedback or guidance on what are the next steps to take regarding this issue.

Thank you,
Manish

Attachments:

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   SDS00001.bmp
   

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