Executive device and stack method and stack system thereof

A stack system of executive devices, comprising:

• an instruction device, comprising a connection pin and a data pin;
• and
• an executive device, comprising a first pin, a second pin, a third pin, a first data pin, a second data pin, a memory unit, and a processing unit;
• wherein, the processing unit is respectively connected to the memory unit, the first pin, the second pin, the third pin, the first data pin, and the second data pin;
• the executive device that is connected to the instruction device is a master device, and all the rest executive devices are slave devices;
• the first pin and the first data pin of the master device are respectively connected to the connection pin and the data pin of the instruction device, and the second pin and the second data pin of the master device are respectively connected to the third pin and the first data pin of the slave device;
• the second pin and the second data pin of the slave device are respectively connected to the third pin and the first data pin of the another slave device;
• the processing unit of the master device generates a coding information and stores the coding information in the memory unit thereof, and the processing units of all the executive devices further detects the second pin to confirm if there is another executive device connected successively;
• if there is the other executive device connected successively, the current executive device generates a following coding information according to the coding information thereof and writes the following coding information via the second data pin thereof to the other executive device connected successively to be the coding information of the other executive device;
• if there is no other executive device connected successively, the current executive device replies the coding information thereof via the first data pin thereof to the master device as an end coding information.

An executive device, comprising:

• a first pin;
• a second pin;
• a third pin;
• a memory unit;
• and
• a processing unit;
• wherein the processing unit is respectively connected to the memory unit, the first pin, the second pin, and the third pin;
• the processing unit respectively sets a first voltage level on the first pin, a second voltage level on the second pin, and a third voltage level on the third pin;
• and the processing unit further detects the first pin and the second pin;
• if the voltage level on the first pin is changed, the processing unit sets the executive device as a master device, generates a coding information, and stores the coding information in the memory unit;
• if the first voltage level retains, the processing unit sets the executive device as a slave device;
• the processing unit further correspondingly stores a master-slave setting in the memory unit;
• if the voltage level of the second pin is changed to the third voltage level, the processing unit determines that there is another executive device connected successively to the current executive device;
• and if the second voltage level retains, the processing unit determines that there is no executive device connected successively to the current executive device.

The executive device of claim further comprising:

• a first data pin;
• and
• a second data pin;
• wherein, the first data pin and the second data pin are respectively connected to the processing unit;
• if there is another executive device connected successively to the current executive device, the current executive device generates a following coding information according to the coding information thereof to the second data pin thereof, and the other executive device receives the following coding information from the first data pin thereof and stores the following coding information to be the coding information thereof;
• if there is no executive device connected successively to the current executive device, the current executive device replies the coding information thereof via the first data pin to the master device to be an end coding information.