M41ST84WMQ6F datasheet by STMicroelectronics

M41ST84WMQ6F Frequently Asked Questions (FAQs)

• What is the recommended crystal oscillator frequency for the M41ST84WMQ6F?
  The recommended crystal oscillator frequency for the M41ST84WMQ6F is 32.768 kHz, which is a standard frequency for real-time clocks.
• How do I ensure the accuracy of the RTC in the M41ST84WMQ6F?
  To ensure accuracy, use a high-quality crystal oscillator, maintain a stable power supply, and avoid exposing the device to extreme temperatures or electromagnetic interference.
• Can I use the M41ST84WMQ6F as a battery-backed SRAM?
  Yes, the M41ST84WMQ6F can be used as a battery-backed SRAM. The device has a built-in battery switch that allows the SRAM to be powered from an external battery when the main power supply is absent.
• What is the maximum data retention period for the M41ST84WMQ6F?
  The maximum data retention period for the M41ST84WMQ6F is 10 years at a temperature of 25°C, assuming a battery voltage of 3.0V and a storage temperature range of -20°C to 85°C.
• How do I handle the power-on reset (POR) and power-fail reset (PFR) in the M41ST84WMQ6F?
  The POR and PFR are handled internally by the device. The POR is triggered when the power supply voltage rises above the POR threshold, and the PFR is triggered when the power supply voltage falls below the PFR threshold.