Computer unit for a control device in a motor vehicle
First Claim
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1. A computing unit for a control device in a motor vehicle, comprising:
- an input receiving an input variable and an output outputting an output variable for controlling a function of a motor vehicle in dependence on the input variable;
a first, nonvolatile, read-only memory having stored therein, on a basis of characteristic variables, first processing specifications for calculating characteristic variables as a function of one of the input variable and a characteristic-variable parameter, and second processing specifications for calculating logic comparison variables;
a second, nonvolatile memory capable of being written to and read from, said second memory having stored therein values of logic parameters; and
said first memory having stored therein a third processing specification for comparing a respective logic comparison variable with a respective logic parameter for calculating the output variable.
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Abstract
The computing unit generates an output signal for controlling a function of the motor vehicle. The processing specification that is stored in a ROM of the computing unit, and with which, in particular, a logic function is described, can be changed even after the ROM mask has been created. Instead of the logic function, a truth table which represents the logic function is stored in an EPROM of the computing unit. A processing specification is stored in the ROM with which calculated variables are compared with the truth table.
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Citations
19 Claims
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1. A computing unit for a control device in a motor vehicle, comprising:
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an input receiving an input variable and an output outputting an output variable for controlling a function of a motor vehicle in dependence on the input variable;
a first, nonvolatile, read-only memory having stored therein, on a basis of characteristic variables, first processing specifications for calculating characteristic variables as a function of one of the input variable and a characteristic-variable parameter, and second processing specifications for calculating logic comparison variables;
a second, nonvolatile memory capable of being written to and read from, said second memory having stored therein values of logic parameters; and
said first memory having stored therein a third processing specification for comparing a respective logic comparison variable with a respective logic parameter for calculating the output variable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification