Circuit and electronic module for automatic addressing
First Claim
Patent Images
1. An integrated circuit comprising:
- a first configuration terminal;
a second configuration terminal; and
an auto addressing circuit coupled to the first and second configuration terminals, and responsive to a data pattern received at the first configuration terminal to assign a node address to an operational circuit, and subsequently to couple the first configuration terminal to the second configuration terminal, the auto addressing circuit comprising;
a comparator including a first input coupled to the first configuration terminal, a second input for receiving a reference voltage, and an output;
a repeater including an input coupled to the first configuration terminal, a control input, and an output coupled to the second configuration terminal; and
an address assignment circuit including an input coupled to the output of the comparator and a control output coupled to the control input of the repeater, the address assignment circuit configured to disable the repeater in response to receiving the data pattern and to activate the repeater after assigning the node address,wherein the integrated circuit is subsequently responsive to the node address when the node address is received.
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Accused Products
Abstract
An integrated circuit includes a first configuration terminal, a second configuration terminal, a bus terminal, and an auto addressing circuit coupled to the first and second configuration terminals. The auto addressing circuit is responsive to a data pattern received at the first configuration terminal to assign a node address to an operational circuit, and subsequently to couple the first configuration terminal to the second configuration terminal. The integrated circuit is subsequently responsive to the node address when the node address is received.
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Citations
19 Claims
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1. An integrated circuit comprising:
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a first configuration terminal; a second configuration terminal; and an auto addressing circuit coupled to the first and second configuration terminals, and responsive to a data pattern received at the first configuration terminal to assign a node address to an operational circuit, and subsequently to couple the first configuration terminal to the second configuration terminal, the auto addressing circuit comprising; a comparator including a first input coupled to the first configuration terminal, a second input for receiving a reference voltage, and an output; a repeater including an input coupled to the first configuration terminal, a control input, and an output coupled to the second configuration terminal; and an address assignment circuit including an input coupled to the output of the comparator and a control output coupled to the control input of the repeater, the address assignment circuit configured to disable the repeater in response to receiving the data pattern and to activate the repeater after assigning the node address, wherein the integrated circuit is subsequently responsive to the node address when the node address is received. - View Dependent Claims (2, 3, 4)
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5. An integrated circuit comprising:
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a first configuration terminal; a second configuration terminal; and an auto addressing circuit coupled to the first and second configuration terminals, and responsive to a data pattern received at the first configuration terminal to assign a node address to an operational circuit, and subsequently to couple the first configuration terminal to the second configuration terminal, the auto addressing circuit comprising; a first comparator including a first input coupled to the first configuration terminal, a second input for receiving a first reference signal, and an output; a second comparator including a first input coupled to the first configuration terminal, a second input for receiving a second reference signal, and an output; and a repeater including an input coupled to the first configuration terminal, a control input, and an output coupled to the second configuration terminal; and an address assignment circuit including a first input coupled to the output of the first comparator, a second input coupled to the output of the second comparator, and a control output coupled to the control input of the repeater, the address assignment circuit configured to detect the data pattern using the first comparator and to detect a failed module based on a signal strength of the data pattern using the second comparator, wherein the integrated circuit is subsequently responsive to the node address when the node address is received.
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6. An electronic module comprising:
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a first configuration terminal; a second configuration terminal; a bus terminal; a resistor having a first terminal coupled to the first configuration terminal, and a second terminal coupled to the second configuration terminal; an auto addressing circuit coupled to the first and second configuration terminals, and responsive to a data pattern received at the first configuration terminal to assign a node address to an operational circuit, and subsequently to couple the first configuration terminal to the second configuration terminal through a repeater, wherein the repeater restores a signal on the first configuration terminal to an original level; and the operational circuit is subsequently responsive to the node address when the node address is received at the bus terminal. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A circuit comprising:
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a first configuration terminal configurable to receive a data pattern from one of an electronic control unit and a previous circuit of a plurality of electronic modules in a daisy-chain; a second configuration terminal configurable to float or to couple to the first configuration terminal of a next electronic module of the plurality of electronic modules in the daisy-chain; a bus terminal configurable to couple to a common bus; a resistor including a first terminal coupled to the first configuration terminal and a second terminal coupled to the second configuration terminal for providing a first signal path; and an auto addressing circuit coupled to the first configuration terminal and the second configuration terminal, the auto addressing circuit configured to selectively provide a second signal path between the first configuration terminal and the second configuration terminal through a repeater, wherein the repeater restores a signal on the first configuration terminal to an original level, after receiving a node address at one of the first configuration terminal and the bus terminal. - View Dependent Claims (18, 19)
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Specification