UJA1023

UJA1023 LIN-I/O slave Rev. 5 — 17 August 2010 Product data sheet 1. General description The UJA1023 is a stand-alone Local Interconnect Network (LIN) I/O slave that replaces basic components commonly used in electronic control units for input and output handling. The UJA1023 contains a LIN 2.0 controller, an integrated LIN transceiver which is LIN 2.0 / SAE J2602 compliant and LIN 1.3 compatible, a 30 kΩ termination resistor necessary for LIN-slaves, and eight I/O ports which are configurable via the LIN bus. An automatic bit rate synchronization circuit adapts to any (master) bit rate between 1 kbit/s and 20 kbit/s. For this, an oscillator is integrated. The LIN protocol will be handled autonomously and both Node Address (NAD) and LIN frame Identifier (ID) programming will be done by a master request and an optional slave response message in combination with a daisy chain or plug coding function. The eight bidirectional I/O pins are configurable via LIN bus messages and can have the following functions: Input: – Standard input pin – Local wake-up – Edge capturing on falling, rising or both edges – Analog input pin – Switch matrix (in combination with output pins) Output: – Standard output pin as high-side driver, low-side driver or push-pull driver – Cyclic sense mode for local wake-up – Pulse Width Modulation (PWM) mode; for example, for back light illumination – Switch matrix (in combination with input pins) On entering a low-power mode it is possible to hold the las...