RDAIRPABPSI5UG , Rev. 2.0
Freescale Semiconductor
7
Understanding the System
3.1 Device Features and Functional Description
This reference design features the following Freescale products:
3.1.1
MPC5602P - Microcontroller
This microcontroller is a member of the highly successful Qorivva MPC560xP family of automotive microcontrollers.
It belongs to an expanding range of automotive-focused products designed to address chassis applications as well as airbag applications.
The advanced and cost-efficient host processor core of this automotive controller family complies with the Power Architecture® embedded
category. It operates at speeds of up to 64 MHz and offers high performance processing optimized for low power consumption. It
capitalizes on the available development infrastructure of current Power Architecture® devices and is supported with software drivers,
operating systems and configuration code to assist with users implementations.
Table 1. Airbag Reference Platform Device Features
Device
Description
Features
MPC560xP
Qorivva 32-bit Microcontroller
• Scalable MCU family for safety applications
• e200z0 Power Architecture 32-bit core up to 64 MHz
• Scalable memory, up to 512 KB flash
MC33789
Airbag System Basis Chip (PSI5)
• Power supply for complete ECU
• Up to four Satellite Sensor interfaces (PSI5)
• Up to nine configurable switch input monitors for simple switch, resistive and
Hall-effect sensor interface
• Safing block and watchdog
• LIN 2.1 physical layer interface
MMA68xx
ECU Local X/Y Accelerometer
• ±20 g to ±120 g full-scale range, independently specified for each axis
• SPI-compatible serial interface
• 10-bit digital signed or unsigned SPI data output
• Independent programmable arming functions for each axis
• 12 low-pass filter options, ranging from 50 Hz to 1000 Hz
MC33797
Four Channel Squib Driver
• Four channel high-side and low-side 2.0 A FET switches
• Externally adjustable FET current limiting
• Adjustable current limit range: 0.8 to 2.0 A
• Diagnostics for high-side safing sensor status
• Resistance and voltage diagnostics for squibs
• 8-bit SPI for diagnostics and FET switch activation
MC33901
High Speed CAN Physical Layer
• ISO11898-2 and -5 compatible
• Standby mode with remote CAN wake-up on some versions
• Very low current consumption in standby mode, typ. 8 µA
• Excellent EMC performance supports CAN FD up to 2 Mbps
MMA52xx
MMA51xx
High G Collision Satellite Sensor
• ±60 g to ±480 g full-scale range
• PSI5 Version 1.3 Compatible (PSI5-P10P-500/3L)
• Selectable 400 Hz, 3 pole, or 4 pole low-pass Filter
• X-axis (MMA52xx) and Z-axis (MMA51xx) available
