Why AT93C66B-SSHM-T Keeps Resetting: 6 Possible Causes
If your AT93C66B-SSHM-T EEPROM is repeatedly resetting, it can be frustrating, especially if you’re working on a sensitive project. Understanding the causes of this issue can help you pinpoint the exact problem and take the necessary steps to fix it. Below are six common causes of this issue and how you can resolve them.
1. Power Supply Issues
Cause: One of the most common reasons for resets in any electronic component, including the AT93C66B-SSHM-T, is an unstable or insufficient power supply. If the voltage drops below the required level, the chip might reset.
Solution:
Check Voltage: Ensure that the supply voltage to the chip is stable and within the required operating range (typically 1.8V to 5.5V for the AT93C66B). Use a Regulator: If your power supply is unstable, consider adding a voltage regulator or a decoupling capacitor close to the chip to stabilize the voltage.2. Incorrect Communication Timing ( Clock Signal)
Cause: The AT93C66B-SSHM-T uses a clock signal for proper communication. If the clock signal is too fast or too slow, it can cause improper data transfers, leading to resets.
Solution:
Verify Clock Frequency: Make sure the clock signal provided to the chip is within the recommended range. Check Timing Diagrams: Review the timing diagrams in the datasheet and ensure your setup matches the requirements.3. Faulty or Loose Connections
Cause: Loose or faulty connections can cause intermittent communication issues with the AT93C66B-SSHM-T, resulting in resets.
Solution:
Inspect Wiring: Carefully check all the connections between the chip and other components, including the I2C or SPI lines (depending on your configuration). Ensure Proper Soldering: Make sure that all pins are properly soldered and that no shorts or breaks exist in the circuit.4. Corrupted Data or Configuration Settings
Cause: If the EEPROM’s internal memory gets corrupted, it can lead to unexpected resets. This may happen if incorrect data is written or if there is a bug in the firmware that interacts with the EEPROM.
Solution:
Reset the EEPROM: Try reprogramming the EEPROM with the correct configuration data. Check Firmware: Review the firmware code to ensure that data writes to the EEPROM are done properly and that no unintended writes or reads occur.5. Electromagnetic Interference ( EMI )
Cause: Electrical noise from surrounding components or external sources can interfere with the EEPROM’s operation, causing it to reset unexpectedly.
Solution:
Shielding: Place the AT93C66B-SSHM-T inside a shielded enclosure to protect it from external EMI. Use Decoupling Capacitors : Add capacitors close to the power pins of the chip to filter out noise.6. Incorrect Chip Selection or Addressing
Cause: If you're using multiple I2C or SPI devices, improper addressing of the AT93C66B-SSHM-T can cause the chip to behave unexpectedly, resulting in resets.
Solution:
Check Device Addressing: Ensure that the chip’s address is correctly set. If you’re using I2C, check the address and make sure there are no conflicts with other devices on the bus. Address Conflicts: Use a different address or switch the communication protocol to avoid any conflicts.Conclusion and Additional Tips:
To prevent the AT93C66B-SSHM-T from resetting, focus on the power supply, communication timing, and ensuring that all connections are stable. Carefully check your system’s configuration and use the provided solutions to troubleshoot the issue. By systematically addressing each possible cause, you should be able to identify and resolve the problem efficiently.
If all else fails, consider replacing the EEPROM to rule out the possibility of a defective chip.
