Abstract

This application note provides an overview of the common bring-up cases of the TLIN1431-Q1 LIN SBC with integrated high-side switch and watchdog. This device can be operated using either of two control modes, determined upon device power-up: pin control or SPI control. In pin control, the device’s pins are configured such that the watchdog and state changes of the TLIN1431-Q1 are controlled using logic inputs to the pins. In this control mode, the device is not configurable through SPI. Conversely, in SPI control, the device’s pins are configured differently, four of which behave as CLK, SDO, SDI, and nCS, thereby allowing SPI programming for the device. The device operates with a different state diagram between the two control modes, including different triggers for state changes, different state conditions, and different programmability. This report will provide an overview of a general method of powering up the TLIN1431-Q1 into either of these two control modes.