ZHCSA58F June 2006 – May 2018 TMP275
PRODUCTION DATA.
For the Two-Wire bus to operate at frequencies above 400 kHz, the master device must issue an Hs-mode master code (00001XXX) as the first byte after a START condition to switch the bus to high-speed operation. The TMP1275 device will not acknowledge this byte, but will switch their input filters on SDA and SCL and their output filters on SDA to operate in Hs-mode, allowing transfers at up to 2.38 MHz. After the Hs-mode master code has been issued, the master will transmit a Two-Wire slave address to initiate a data transfer operation. The bus will continue to operate in Hs-mode until a STOP condition occurs on the bus. Upon receiving the STOP condition, the TMP275 switches the input and output filter back to fast-mode operation.