MC33912| Datasheet

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Freescale Semiconductor Advance Information

Document Number: MC33912 Rev. 4.0, 2/2008

LIN System Basis Chip with DC Motor Pre-driver and Current Sense
The 33912 is a Serial Peripheral Interface (SPI) -controlled System Basis Chip (SBC), combining many frequently used functions in an MCU-based system, plus a Local Interconnect Network (LIN) transceiver. The 33912 has a 5.0V - 60mA low dropout regulator with full protection and reporting features. The device provides full SPIreadable diagnostics and a selectable timing watchdog for detecting errant operation. The LIN Protocol Specification 2.0 compliant LIN transceiver has waveshaping circuitry that can be disabled for higher data rates. Two 60mA high side switches and two 160mA low side switches with output protection are available for driving resistive and inductive loads. All outputs can be pulse-width modulated (PWM). Four high voltage inputs are available for use in contact monitoring, or as external wake-up inputs. These inputs can be used as high voltage Analog Inputs. The voltage on these pins is divided by a selectable ratio and available via an analog multiplexer. The 33912 has three main operating
modes: Normal (all functions available), Sleep (VDD off, wake-up via LIN, wake-up inputs (L1-L4), cyclic sense and forced wake-up), and Stop (VDD on with limited current capability, wake-up via CS, LIN bus, wake-up inputs, cyclic sense, forced wake-up and external reset). The 33912 is compatible with LIN Protocol Specification 2.0. Features

33912
SYSTEM BASIS CHIP WITH LIN 2ND GENERATION

AC SUFFIX (Pb-FREE) 98ASH70029A 32-PIN LQFP

ORDERING INFORMATION
Device Temperature Range (TA) - 40 C to 125 C 32-LQFP -40 C to 85 C Package

Full-duplex SPI interface at frequencies up to 4MHz LIN transceiver capable of up to 100kbps with wave shaping MC33912BAC/R2 Two 60mA high side and two 160mA low side protected switches MC34912BAC/R2 Four high voltage analog/logic Inputs Configurable window watchdog 5.0V low drop regulator with fault detection and low voltage reset (LVR) circuitry Current sense module Switched/protected 5.0V output (used for Hall sensors) Pb-free packaging designated by suffix code AC
VBAT

33912
VS1 VS2 VSENSE HS1 L1 L2 L3 L4

LIN INTERFACE

LIN VDD PWMIN ADOUT0 ADOUT1 MOSI MISO SCLK CS RXD TXD IRQ RST

LS1
M

MCU

LS2 ISENSEH ISENSEL HVDD HS2 WDCONF

Figure 1. 33912 Simplified Application Diagram

* This document contains certain information on a new product. Specifications and information herein are subject to change without notice.

Freescale Semiconductor, Inc., 2007. All rights reserved.

LGND PGND AGND

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