80C52 datasheet by Temic Semiconductors

80C52 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the 80C52 can operate at?
  The 80C52 can operate at a maximum clock frequency of 24 MHz, but it's recommended to operate it at 12 MHz or lower for reliable operation.
• How do I configure the 80C52's serial communication protocol?
  The 80C52's serial communication protocol can be configured using the SCON (Serial Control) register. The SCON register determines the serial mode, baud rate, and data format. Refer to the datasheet for specific bit settings.
• What is the purpose of the EA (External Access) pin?
  The EA pin is used to enable or disable external program memory access. When EA is high, the 80C52 accesses external program memory. When EA is low, the 80C52 accesses internal program memory.
• How do I use the 80C52's interrupts?
  The 80C52 has five interrupt vectors: two external interrupts (INT0 and INT1), two timer interrupts (Timer 0 and Timer 1), and a serial interrupt. To use interrupts, set the corresponding interrupt enable bit in the IE (Interrupt Enable) register and provide an interrupt service routine at the corresponding vector address.
• What is the difference between the 80C52 and the 8052?
  The 80C52 and 8052 are similar microcontrollers, but the 80C52 has an additional 8KB of internal program memory, making it a more powerful and feature-rich device.