Sistemas Embarcados na indústria automotiva André Resende

Microcontroller CPU Trends There is also a trend to use high-performance RISC CPUs in automotive electronic control systems in preference to the traditional Complex Instruction Set Computers (CISC) units. This trend will continue. Traditionally, what has set RISC apart from CISC is the ability to execute an instruction in a single clock

Electronic Memory Types Automobile manufacturers often wish to revise software in the field. (EEPROM) memory provides the technology that allows such field revisions. The next step is expected to be the implementation of Magnetoresistive Random Access Memory (MRAM)

Electromagnetic Compatibility A system is considered electromagnetically compatible if it has satisfied three criteria: – it does not cause interference with other systems; – it is not susceptible to emissions from other systems; and –it does not generate interference with itself.

REAL-TIME EMBEDDED NETWORKING IN AUTOMOBILES: CAN Controller Area Network (CAN) is an ISO standard (ISO 11898) and is in widespread use today. Many vehicles on sale in Europe today use CAN (for example, the Volvo S80, the Saab 9-5, the Volkswagen Passat, the Mercedes-Benz S class, the Land Rover Freelander). CAN is almost certain to succeed in automotive to become the de facto standard for in-vehicle control. CAN is also widely used in industrial control, with several popular higher-level protocols (for example, DeviceNet).

Connectivity In the automobile industry, too, common standards for connectivity such as Control Area Network (CAN) and the local interconnect network (LIN) are merging into the mainstream, and OS and network-management standards like OSEK are being adopted

CPLDs meet automotive requirements Lattice Semiconductor's ispMACH 4000V family of CPLDs now supports the full automotive ambient temperature range of -40 to 125°C. The 3.3V ispMACH 4000V family supports a wide range of 3.3V, 2.5V and 1.8V I/O standards and now features 5V tolerant I/Os. The automotive family provides four logic density solutions from 32 to 256 macrocells. The devices support 7.5ns pin-to-pin delay and 168MHz operating frequencies. Typical standby power consumption for the four devices is approximately 40mW. The family includes multiple density-I/O combinations in thin quad flat pack packages ranging from 44 to 176 pins.