RDAIRPABPSI5UG , Rev. 2.0
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Freescale Semiconductor, Inc.
Understanding the System
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Understanding the System
The Freescale Airbag Reference Platform (ARP) is an application demonstrator system which provides an airbag Electronic Control Unit
(ECU) implementation example using complete Freescale standard products for the growing automotive safety segment. The GUI
firmware does not constitute a true airbag application but is intended to demonstrate features and capabilities of Freescale's standard
products aimed at the airbag market.
The ARP addresses a mid-range airbag market segment, with up to eight squib drivers (for squibs and seatbelt pre-tensioners) and four
satellite sensor interfaces supporting four or more high g collision sensors positioned around the vehicle. All other vehicle infrastructure
(including seat belt sensors and vehicle communications networks) and ECU functions (including full power supply architecture and a local
mid g X/Y safing sensor) are also supported.
The new ARP hardware is implemented using a standard Freescale Qorivva 32-bit microcontroller (MPC560xP), Analog (MC33789 and
MC33797). In the case of sensors, the families include both local ECU and PSI5 satellite sensors. The ARP implements a system safety
architecture based on the features in the standard products supported by appropriate firmware.
The example ECU is implemented on a single Printed Circuit Board (PCB). Vehicle functions - in principal, satellite sensors, seat belt
switches and warning lamps - can be accessed thanks to the ECU cables.
This User Manual is intended to detail the available hardware functionality and related software drivers (firmware) offered in the Freescale
ARP.
The high level system block diagram here outlines the way the Freescale standard products are used to implement an example airbag
ECU.
Figure 2. RDAIRBAGPSI5 Block Diagram
