SERIAL DATA TRANSMITTING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide the serial data transmitting system of a low bit error rate, where a program controlling a unit operation and a program controlling communication coexist in a microcomputer whose number of processing bits is small, the execution efficiency of a main processing by an interruption processing is low and high speed data transmission is possible. SOLUTION: CPU 21 being the signal processing part of a reception side executes an outer interruption processing by input to an outer interruption port INT and starts a reception serial clock. Then, CPU 21 samples data inputted to a serial data input port SI in synchronizing with the rise of the reception serial clock and sequentially stores it in a serial register 219. CPU 21 collectively transfers data of the serial register 219 to a majority judgment means by a serial interruption means when data on the number of bits of the serial register 219 is inputted to the serial register 219.