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ADA4254 MM_CRC_ERR

Thread Summary

The user encountered an MM_CRC_ERR flag after reading GAIN_CAL7 on the ADA4254, with GPIO3 going low 500us later. The final answer indicates that this issue is a duplicate and refers to a previous thread where an engineer provided guidance. The user's SPI SCLK and external clock are both set to 1MHz, and the alignment of these clocks is questioned as a potential cause. No specific solution was provided in this thread.
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Category: Datasheet/Specs
Product Number: ADA4254

Hello.

I have questions about ADA4254.

After reading GAIN_CAL7 on the ADA4254, GPIO3 went low approximately 500us later. Reading DIGITAL_ERR (0x03) revealed that the MM_CRC_ERR error flag in Bit1 was set.

I have a question regarding Case 2 in the “Troubleshooting MM CRC Flags” section of the ADA4254 Reference Manual.

I have set the SPI SCLK to 1MHz and the ADA4254 external clock to 1MHz. Does this correspond to Case 2?
Should I increase the SPI SCLK speed further?

Additionally, while the phases of SCLK and the external clock are each approximately aligned, could this alignment between SCLK and the external clock potentially correspond to Case 2 of the MMCRC error?

Best regards.

Edit Notes

I have added a question.
[編集者:miky、編集時刻: 5 Nov 2025 日 1:47 PM 時 (GMT -5)]