Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
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Uart Serial Data
Two methods of data transmission are 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 the serial data. The 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 the serial data travels. The UART receives the data in a serial format, converts the data to a parallel format, and places the data on the data bus (which is recognizable to the on board computer). The UART also accepts the parallel data from the data bus, converts the data to a serial format, and transmits the data to the Tech 1 or other scan tools. 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.