Single-chip-based electronic appliance using a data bus for reading and writing data concurrently

A single-chip based electronic appliance comprising:

• a data bus for transmitting data;
• an input device electrically connected with the data bus for providing data;
• an output device electrically connected with the data bus for receiving data, the output device comprising a device enable pin for controlling the on and off status of the output device;
• a micro-controller electrically connected with the data bus for controlling the input device and output device;
• an address bus electrically connected with the micro-controller;
• and
• a position decoder electrically connected between the address bus and the device enable pin of the output device;
• wherein when an address outputted by the micro-controller to the address bus is a predetermined address, the position decoder triggers the output device by using the device enable pin of the output device so that when the micro-controller reads a datum from the input device through the data bus, it writes the datum to the output device through the data bus in one instruction cycle to increase a data transmission speed between the input device and the output device.