P80C31SBBB datasheet by Philips Semiconductors

P80C31SBBB Frequently Asked Questions (FAQs)

• What is the maximum clock frequency for the P80C31SBBB?
  The maximum clock frequency for the P80C31SBBB is 12 MHz, but it can be overclocked up to 16 MHz with careful consideration of power consumption and thermal management.
• How do I configure the UART baud rate on the P80C31SBBB?
  The UART baud rate on the P80C31SBBB can be configured using the Timer 1 in mode 2 (auto-reload) and the serial port control register (SCON). The baud rate generator formula is: Baud Rate = (F_CPU / 16) / (12 * (TH1 + 1)).
• Can I use the P80C31SBBB with a 5V power supply?
  The P80C31SBBB is designed to operate at 5V, but it's recommended to use a voltage regulator to ensure a stable 5V supply. The microcontroller can tolerate a voltage range of 4.5V to 5.5V, but operating at the upper limit may reduce its lifespan.
• How do I implement a delay function on the P80C31SBBB?
  A delay function can be implemented using the Timer 0 or Timer 1 in mode 0 (13-bit timer). The delay time can be calculated using the timer overflow formula: Delay Time = (Timer Period * Timer Prescaler) / F_CPU.
• Can I use the P80C31SBBB with an external crystal oscillator?
  Yes, the P80C31SBBB can be used with an external crystal oscillator. The microcontroller has an internal oscillator circuit that can be connected to an external crystal or ceramic resonator. The recommended crystal frequency is 12 MHz, but other frequencies can be used with proper configuration of the internal oscillator circuit.