How to check and test memory mounting on boards using the MC683 series series

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system. In particular, a board in a mobile communication system compares write data with read data during an error correction operation (S5), so that a problem related to memory can be easily recognized quickly, and a memory is not mounted on the board. When mounted to the system in a state that the LED is blinking (S8) has the effect that the user can easily know this.