![]() ![]() Reception – Data receive through the RXD pin are recognized when the following two conditions are met: bit REN=1 and RI=0.When all 8 bits have been sent, the TI bit of the SCON register is automatically set. In fact, this process starts after any instruction being performed upon this register. ![]() Transmission – Data transmit is initiated by writing data to the SBUF register.On transmit, the least significant bit (LSB bit) is sent/received first. ![]() The baud rate is fixed at 1/12 the oscillator frequency. In mode 0, serial data are transmitted and received through the RXD pin, while the TXD pin output clocks. This bit is also cleared from within the software. It signals that byte is received and should be read quickly prior to being replaced by new data.
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