CP82C55A-5 datasheet by Harris Semiconductor

CP82C55A-5 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the CP82C55A-5 can operate at?
  The CP82C55A-5 can operate at a maximum clock frequency of 5 MHz.
• How do I reset the CP82C55A-5?
  The CP82C55A-5 can be reset by asserting the RESET pin low for at least 10 ns.
• What is the purpose of the AEN (Address Enable) pin?
  The AEN pin is used to enable or disable the address lines (A0-A7) of the CP82C55A-5. When AEN is high, the address lines are enabled, and when AEN is low, the address lines are disabled.
• Can I use the CP82C55A-5 as a general-purpose I/O port?
  Yes, the CP82C55A-5 can be used as a general-purpose I/O port. The device has 24 I/O lines that can be programmed as inputs or outputs.
• How do I configure the CP82C55A-5 for interrupt-driven I/O operations?
  To configure the CP82C55A-5 for interrupt-driven I/O operations, you need to program the interrupt mask register (IMR) to enable interrupts for the desired I/O lines, and then set the interrupt flag (IF) to trigger an interrupt when an I/O event occurs.