JAJSGR1E October 2014 – September 2021 TMP102-Q1
In order for the two-wire bus to operate at frequencies above 400 kHz, the master device must issue an Hs-Mode master code (0000 1xxx) as the first byte after a START condition to switch the bus to high-speed operation. The TMP102-Q1 device does not acknowledge this byte, but switches the input filters on SDA and SCL and the output filters on SDA to operate in Hs-mode, allowing transfers of up to 2.85 MHz. After the Hs-Mode master code has been issued, the master transmits a two-wire slave address to initiate a data transfer operation. The bus continues to operate in Hs-Mode until a STOP condition occurs on the bus. Upon receiving the STOP condition, the TMP102-Q1 device switches the input and output filters back to fast-mode operation.