Patent ID: 6161199
Filing Date: 2000-12-12
Classification: G06F

Abstract:
An in-system debug (ISD) apparatus for debugging a program residing in a microcontroller of a microcontroller system, the apparatus comprising:a system board of the microcontroller system;a microcontroller having built-in ISI) hardware circuitry mounted on the system board having a pin that provides a first function during a normal mode of operation and a second data relay function during an internally controlled in-system debugging mode of operation for relaying data generated by the microcontroller responsive to executing the program to an external monitoring system without affecting the normal I/O operations of the microcontroller, andthe external monitoring system, comprising:an ISD interface board coupled to the system board for receiving the data generated by the microcontroller; anda computer system coupled to the ISD interface board, the computer system comprising an ISD software module for monitoring the data generated by the microcontroller.