摘要:
A method and a device for testing a computer core in a processor having at least two computer cores is described. The computer cores are connected to each other via an internal connecting system, both computer cores contributing toward the operating sequence of a machine. In the method for testing a computer core, with which a high error detection rate may be achieved in a minimum outlay of time, a test is run in one computer core, while a program for executing the driving operation of the motor vehicle is being processed in the other computer core at the same time.
摘要:
A microcontroller for use in a control device for an internal combustion engine includes: an analysis access via which internal data in the microcontroller can be accessed from outside the microcontroller; a clock generator which generates clock timing for data communication of the microcontroller with other units. The microcontroller is configured to change over from a first clock to a second clock when there is an access to the microcontroller via the analysis access.
摘要:
A microcontroller having a computing unit and a logic circuit. The microcontroller carries out computations for a regulation or control in a vehicle. The computing unit is connected to the logic circuit, and the logic circuit has an arrangement for computing an exponential function and is configurable.
摘要:
A method for transmitting data from and to a control device, in particular an engine control device for a motor vehicle that has a first communication interface and a second communication interface, the method having the following steps: connecting the first communication interface to a development tool, and connecting the second communication interface to one or more function units during the development phase of the control device, transmitting data from the control device to the development tool via the first communication interface using a first communication protocol, transmitting data from the development tool to the control device via the first communication interface using the first communication protocol, breaking the connection between the first communication interface and the development tool, connecting the first communication interface to one or more additional 20 function units, and transmitting data between the control device and the other function unit or function units via the first communication interface using a second communication protocol.
摘要:
A method is provided for controlling a microcontroller in a control unit in a motor vehicle, having a processor core, at least one read-only memory area and at least one rewritable memory area, at least one control program which is intended to be processed by the processor core being stored in the rewritable memory area. In order to provide a method for controlling a microcontroller in a control unit that better protects the verification of memories of the microcontroller against unauthorized intervention, a verification program is stored in a write-once memory area of the rewritable memory area and a service program is stored in the read-only memory area. The verification program is called by the control program via the service program at regular intervals and verifies at least part of the rewritable memory area. In addition, the service program resets a counter. A RESET of the control unit is triggered by the verification program when manipulation of the verified memory area is detected or by the counter in the event of counter overflow.
摘要:
A method and apparatus for monitoring an electronic control system such that provision is made for the complete data of at least one memory to be read sequentially into an ECC unit, which can be filled very rapidly from the memory, and automatically checked there, with no need to transfer the complete data in time-consuming fashion to a processor; the ECC check width encompassing the data of a plurality of memory cells of the memory and being able to be a multiple of the read word width of the processor; an additional datum being created in each case for the data of a ECC check width and being storable in the memory, and the entire code/data region of the at least one memory therefore being able to be checked, outside the ongoing instruction accesses, by the fact that for each request by the processor for the contents of a single memory cell, the ECC unit is filled from the memory to the entire ECC check width including the additional datum; a check datum being created from the data of the complete ECC check width and the check datum automatically being compared, in the ECC unit, with the stored additional datum.
摘要:
A system for supplying power to a volatile semiconductor memory having a memory array, with the semiconductor memory being provided with a standby voltage that is present at a second connection of the semiconductor memory. To implement the power supply system as simply and with as few components as possible, the semiconductor memory is provided with a stabilization circuit for stabilizing the standby voltage that has a low impedance when the input voltage is elevated and a high impedance when the input voltage is too low to supply the semiconductor memory.
摘要:
A method and a device for refreshing the memory content of at least one memory cell of a read-only memory is described. An embodiment of the present invention involves determining the instantaneous charge status of the memory cell; comparing the instantaneous charge status of the memory cell with a charge threshold (U_schw) which is greater than the reading charge (U_erh) sufficient for correct detection of the memory content of the memory cell; and raising the charge status of the memory cell if the instantaneous charge status of the memory cell is below the charge threshold (U_schw).
摘要:
A control unit includes at least one computing device and at least one separate peripheral module which is connected to the computing device via a serial multiwire bus, the peripheral module including at least one output stage for transferring serial data to means outside of the control unit. In order to keep the number of pins required on a peripheral module to a minimum, thereby reducing costs for the entire control unit, the peripheral module has an asynchronous single-wire interface between one interface for the serial multiwire bus and the output stage. The asynchronous single-wire interface is preferably a UART (universal asynchronous receiver/transmitter) interface. The serial multiwire bus is preferably a microsecond bus.
摘要:
A data communication method for semiconductor chips including transmitting load control data, pilot data and a transmission clock signal from a first semiconductor chip to one or more second semiconductor chips that are each coupled to one or more electrical loads, driving the electrical loads based on a timing defined by the load control data, deriving a transmission rate by dividing the transmission clock signal by a division factor prescribed by the pilot data, and transmitting diagnostic data at the transmission rate from the one or more second semiconductor chips to the first semiconductor chip.