US 12,132,810 B2
Protocol auto-detection
Keith Charles Brouse, Vail, AZ (US); Michael Douglas Snedeker, Tucson, AZ (US); and Hugo Cheung, Tucson, AZ (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Dec. 18, 2018, as Appl. No. 16/224,092.
Prior Publication US 2020/0195759 A1, Jun. 18, 2020
Int. Cl. H04L 69/18 (2022.01); G06F 13/42 (2006.01); H04L 69/14 (2022.01)
CPC H04L 69/18 (2013.01) [G06F 13/4282 (2013.01); H04L 69/14 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
receiving signals at terminals of an interface having first components configured to detect an inter-integrated circuit (I2C) protocol, and second components, separate from the first components, configured to detect a serial peripheral interface (SPI) protocol;
concurrently detecting and interpreting the signals at each of the first components and the second components, wherein the first components are configured to detect and interpret only signals corresponding to the 12C protocol and the second components are configured to detect and interpret only signals corresponding to the SPI protocol;
determining, by the second components, whether the signals received at the interface correspond to the SPI protocol by counting pulses on a serial clock signal and comparing the pulses to a complete frame;
transmitting a first reset signal from the first components to the second components to disable the second components in response to the second components determining that the signals received at the terminals correspond to the I2C protocol; and
transmitting a second reset signal from the second components to the first components to disable the first components in response to the first components determining that the signals received at the terminals correspond to the SPI protocol.