Question

You are reviewing a design for a PIC24HJ128GP504 project that uses change notification interrupts. After checking the internal registers using MPLAB connected to the hardware, you have captured the following register values:

CHEN1 = 0X0020 IPC0 = 0X4454 IEC0 = 0X0000
CHEN2 = 0X0000 IPC1 = 0X4445 IEC1 = 0X0008
CNPU1 = 0X0020 IPC2 = 0X4444 IEC2 = 0X0000
CNPU2 = 0X0000 IPC3 = 0X4544
IPC4 = 0X5444
IFS0 = 0X0000 IPC5 = 0X5444
IFS1 = 0X0000 IPC6 = 0X4444
IFS2 = 0X0001
IFS3 = 0X0000

Using these register values to answer (and justify your answers) to the following questions:
(a) What external pin (ie. RA0, RA1, etc) is configured to enable the change notification functionality?

Answer 1

The change notification functionality is enabled on the external pin RB1.

Step-by-step explanation:

The change notification functionality is enabled on the external pin RB1.