Freescale公司的MC33903/4/5是第二代的系統基礎芯片(SBC),能作為MCU的先進電源管理,并集成了幾種先進的集成電路如傳感器和CAN收發器,內置了增強高速CAN接口(ISO11898-2和-5),以及本地和總線故障診斷,保護與故障安全操作模式.主要用在航空和水下系統,汽車和機器人系統,農場設備,燈和電感負載控制,DC馬達控制,工業激勵控制等.本文介紹了MC33903/4/5系列產品主要特性,框圖和簡化應用框圖,評估板KIT33905D5EKEVBE主要特性,建立框圖,電路圖,材料清單和PCB元件布局圖和走線圖.

The 33903/4/5 is the second generation family of the System Basis Chip (SBC). It combines several features and enhances present module designs. The device works as an advanced power management unit for the MCU with additional integrated circuits such as sensors and CAN transceivers. It has a built-in enhanced high-speed CAN interface (ISO11898-2 and -5) with local and bus failure diagnostics, protection, and fail-safe operation modes. The SBC may include zero, one or two LIN 2.1 interfaces with LIN output pin switches. It includes up to four wake-up input pins that can also be configured as output drivers for flexibility. This device is powered by SMARTMOS technology.

This device implements multiple Low-power (LP) modes, with very low-current consumption. In addition, the device is part of a family concept where pin compatibility adds versatility to module design.

The 33903/4/5 also implements an innovative and advanced fail-safe state machine and concept solution.

MC33903/4/5系列產品主要特性:

?Voltage regulator for MCU, 5.0 or 3.3 V, part number selectable, with possibility of usage external PNP to extend current capability and share power dissipation
?Voltage, current, and temperature protection
?Extremely low quiescent current in LP modes
?Fully-protected embedded 5.0 V regulator for the CAN driver
?Multiple undervoltage detections to address various MCU specifications and system operation modes (i.e. cranking)
?Auxiliary 5.0 or 3.3 V SPI configurable regulator, for additional ICs, with overcurrent detection and undervoltage protection
?MUX output pin for device internal analog signal monitoring and power supply monitoring
?Advanced SPI, MCU, ECU power supply, and critical pins diagnostics and monitoring.
?Multiple wake-up sources in LP modes: CAN or LIN bus, I/O transition, automatic timer, SPI message, and VDD overcurrent detection.
?ISO11898-5 high-speed CAN interface compatibility for baud rates of 40 kb/s to 1.0 Mb/s
?Scalable product family of devices ranging from 0 to 2 LINs which are compatible to J2602-2 and LIN 2.1

MC33903

/4/5系列產品應用:

?Aircraft and marine systems
?Automotive and robotic systems
?Farm equipment
?Industrial actuator controls
?Lamp and inductive load controls
?DC motor control applications requiring diagnostics
?Applications where high-side switch control is required

圖1.MC33905內部框圖

圖2.MC33904內部框圖

圖3.MC33903內部框圖

圖4.MC33905D簡化應用框圖

圖5.MC33905S簡化應用框圖

圖6.MC33904簡化應用框圖

圖7.MC33903簡化應用框圖

評估板KIT33905D5EKEVBE

The KIT33905D5EKEVBE supports the 33905D5 and 33904 devices, which are the second generation family of System Basis Chips, which combine several features and enhance present module designs. The devices work as an advanced power management unit for the MCU and additional integrated circuits such as sensors, CAN transceivers. They have a built-in enhanced high speed CAN interface (ISO11898-2 and -5), with local and bus failure diagnostics, protection, and fail safe operation mode. The SBCs may include one or two LIN 2.0 interfaces with LIN output pin switches. The 33904/5 include 2 or 3 wake-up input pins than can also be configured as output drivers for flexibility.

評估板KIT33905D5EKEVBE主要特性:

Nominal operating supply voltage range of 5.5 V to 27 V
Individually routed power supply inputs for VSUP1 and VSUP2
5.0/3.3 V regulator for MCU with an external PNP ballast transistor to increase current capability
Multiple CAN Bus termination options supported via socket
Two high/low side I/Os (SPI configurable) accessible through test points
Status of I/O-0 and I/O-1 indicated by an LED (dependent on jumper configuration)
Debug mode/watchdog configuration via jumper settings
MUX output voltage accessible through a test point and external resistor selectable through jumper
3.3 V or 5.0 V output voltage test point VAUX (SPI configurable)
I_WAKE_I test point to enable a FET and load VDD with current to wake-up the SBC
LIN1_T and LIN2_T test points to monitor I/O voltages (SPI configurable)
I/O-0, I/O-1, VAUX, 5V_CAN, SAFE, and VDD status indicated by LED
100 mil 2x8 pin standard header connector for SPI communication
100 mil 16 pin standard header connector for custom MCU board connections

圖8. 評估板KIT33905D5EKEVBE/KIT33905BD3EVBE外形圖

評估板KIT33905D5EKEVBE/KIT33905BD3EVBE包括:

?KIT33905D5EKEVBE or KIT33905BD3EVBE Hardware
?CD33905 (includes SPIGen Software)
?CABLE, RIBBON FLAT 16 PIN ASSY, 0.100" PITCH, 6" LENGTH

圖9. 評估板KIT33905D5EKEVBE/KIT33905BD3EVBE建立配置圖

圖10. 評估板KIT33905D5EKEVBE電路圖

評估板KIT33905D5EKEVBE材料清單:

圖11. 評估板KIT33905D5EKEVBE頂層PCB元件布局圖

圖12. 評估板KIT33905D5EKEVBE頂層PCB走線圖

圖13. 評估板KIT33905D5EKEVBE底層PCB走線圖
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