Power control for PXI express controller
First Claim
1. A system comprising:
- a circuit board configured to insert into a chassis to couple the circuit board to the chassis, wherein the chassis comprises a power supply configured to provide main power and auxiliary power to the system, wherein the circuit board comprises;
a chipset configured to at least partially implement functions performed by the system; and
control logic coupled to the chipset via a first signal line configured to carry a first signal;
wherein the control logic is configured to automatically assert the first signal in response to the power supply asserting a feedback signal in response to the power supply being switched on and providing main power to the system;
wherein the chipset is configured to instruct the system to turn on in response to the first control signal being automatically asserted by the control logic; and
wherein the control logic is configured to keep the system turned off when auxiliary power is applied to the system at a point in time when the system is turned off.
5 Assignments
0 Petitions
Accused Products
Abstract
A PXI Express controller may be configured to support at least three different conditions under which the controller may be turned on. If a chassis (e.g. a PXI Express chassis) interfacing with the controller has a power button, the first condition (which may be considered normal operation) may be met when the power button is being pressed at a time auxiliary power is present. When the chassis does not have a power button, the second condition may be met when the power is switched on at a time auxiliary power is present, and the third condition may be met when the power is switched on at a time auxiliary power is not present. A state-machine comprised in the PXI Express controller may be configured to interface with a chipset equally comprised in the PXI Express controller, to perform the control functions required to provide the support for the three different conditions.
16 Citations
13 Claims
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1. A system comprising:
a circuit board configured to insert into a chassis to couple the circuit board to the chassis, wherein the chassis comprises a power supply configured to provide main power and auxiliary power to the system, wherein the circuit board comprises; a chipset configured to at least partially implement functions performed by the system; and control logic coupled to the chipset via a first signal line configured to carry a first signal; wherein the control logic is configured to automatically assert the first signal in response to the power supply asserting a feedback signal in response to the power supply being switched on and providing main power to the system; wherein the chipset is configured to instruct the system to turn on in response to the first control signal being automatically asserted by the control logic; and wherein the control logic is configured to keep the system turned off when auxiliary power is applied to the system at a point in time when the system is turned off. - View Dependent Claims (2, 3, 4, 5)
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6. A method for powering a system, wherein the system comprises control logic and system logic, the method comprising:
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keeping the system turned off when auxiliary power is applied to the system at a point in time when the system is turned off; and when the system is turned off, performing one of; (a) switching on a power supply to provide main power to the system;
or and(b) pressing a power button to instruct the system logic to boot up the system; in response to (b); (c) asserting a power button signal to the system logic; (d) the system logic instructing the system to boot up in response to (c); (e) the control logic turning on the power supply in response to (d); (f) the power supply indicating to the control logic that the power supply is on and providing main power to the system; and (g) the system booting up in response to (f); and in response to (a); (h) performing (f); (i) the control logic asserting the power button signal to the system logic in response to (h); (j) the system logic instructing the system to boot up in response to (i); and (k) the system booting up in response to (j). - View Dependent Claims (7, 8)
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9. A system comprising:
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a chassis comprising a power supply configured to provide; main power and auxiliary power to the system; and a power supply status signal indicating whether the power supply is providing main power to the system; and a circuit board configured to be inserted into the chassis, the circuit board comprising; a chipset configured to control one or more system functions; control logic coupled to the chipset and configured to receive the power supply status signal, wherein the control logic is further configured to automatically assert a power button signal to the chipset in response to the power supply status signal indicating that the power supply is providing main power to the system when the system is off; wherein the chipset is configured to instruct the system to turn on in response to the power button signal being asserted by the control logic. - View Dependent Claims (10, 11, 12, 13)
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Specification