J2716 SENT - Single Edge Nibble Transmission, Updates and Status 2011-01-1034
The SAE J2716
SENT (Single Edge Nibble Transmission) Protocol has entered production with a number of announced products. The SENT protocol is a point-to-point scheme for transmitting signal values from a sensor to a controller. It is intended to allow for high resolution data transmission with a lower system cost than available serial data solution. The SAE SENT Task Force has developed a number of enhancements and clarifications to the original specification which are summarized in this paper.
The most significant updates include the following:
Adding an optional pause pulse which can make the frame length independent of the SENT message data content
Defining a new enhanced serial message encoding as an optional replacement for the original short serial data message
Clarifying the diagnostics and remedial actions for successive calibration pulse comparisons
Adding recommended processing of a zero nibble in addition to the data in the checksum calculation to protect against a common error in the last data nibble and checksum
Adding a new recommended circuit topology to better support 3.3V receiver systems
Updating specification of data formats and protocols for mass air flow (MAF), Temperature and Pressure applications.
Adding new communication protocols to take advantage of the new Enhanced Serial Message