Cavalier/Z24 L4-144 2.4L DOHC VIN T SFI (1996)
Decimal/Hexadecimal/Binary Conversion Table
UART SERIAL DATA
Beginning in 1995 two methods of data transmission will be used. One method involves a Universally Asynchronous Receiving/Transmitting
(UART) protocol. UART is an interfacing device that allows the on board computer to send and receive serial data. "Serial data" refers to
information which is transferred in a linear fashion - over a single line, one bit at a time. A "data bus" describes the electronic pathway through
which serial data travels. The UART receives data in a serial format, converts the data to parallel format, and places them on the data bus (which is
recognizable to the on board computer). The UART also accepts parallel data from the data bus, converts the data to serial format, and transmits
them to the Tech 1 or other scan tool. This method has been the common strategy for establishing a communication link between the on board
control module and the off board monitor/scanner since 1981.
