UART type asynchronous data transmission device for use in a microcontroller or similar has improved clock deviation control means

摘要

Device (UART1) comprises at least one receive data terminal (RPD) for receipt of data (RDT) and a receive data register (SREG1) which is connected to the receive data terminal. Said receive register is clocked by a strobe (CKS), which is synchronized with a local clock signal (CK). The device further comprises a clock deviation measuring circuit (DMC, B1, B2) which is used to determine the number of strobe periods (M) that appear during K periods of a synchronization signal and to compare the strobe period value with upper and lower thresholds. The invention also relates to a corresponding microcontroller and method for transmission of asynchronous data.