Final answer:
The student's question involves creating a circuit to demonstrate an external interrupt on a microcontroller or microprocessor using the INT pin and an LS244 buffer IC. The circuit is to manage noise on the interrupt line and has an interrupt vector of 4Fh.
Step-by-step explanation:
The student is asking for a circuit design that would demonstrate the use of an external interrupt service routed through the INT pin, with a specific interrupt vector (4Fh) using a buffer IC, specifically the LS244. A buffer IC like the LS244 is used to interface the interrupt signal to the microcontroller or microprocessor to prevent any unwanted noise or signals from triggering the interrupt unintentionally. The circuit typically includes the LS244 IC connected to the INT pin with additional components like pull-up resistors and possibly a switch to manually trigger the interrupt. Usually, we would also expect to see decoupling capacitors near the power supply pins of the LS244.