JAJSEG5A January 2018 – October 2018 ADS112U04
The ADS112U04 interface automatically synchronizes to the baud rate of the host, meaning that the time required for commands to be latched by the interface varies with baud rate. Commands are not processed until after being latched by the ADS112U04.
Commands are latched by the ADS112U04 when the device detects the stop bit. Stop bit detection generally occurs in the middle of the stop bit where the middle of the stop bit is defined as tBAUD / 2 after the rising edge of the stop bit. However, this timing is not exact because of the asynchronous nature between the host baud clocking and the ADS112U04 internal oscillator as well as jitter in the ADS112U04 internal oscillator. The stop bit detection timing error can be as large as 4 · tCLK in normal mode and 8 · tCLK in turbo mode.