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SN74LV8153: UART Compatibility

Mark Philip Felipe
Genius 9705 points
Part Number: SN74LV8153

Hi Team, we just need some clarifications. page 3. It seems that ST1 (second start bit, closest to data) and SP (stop bit) are expected to be the same logic level. Just to confirm the UART must transmit and receive start/stop bits which are inverted of one another. Please correct us if we are wrong.

Thank you very much.

Regards,

Mark

  • 0
    Guru 277220 points

    This device uses the falling edge between the stop bit and the first start bit and the rising edge between the start bits to detect the data rate. ST1 indeed must be high.

    Please note that when sending 8-bit data with a normal UART, ST1 would be lowest data bit.