Configurable baseboard to power a mezzanine card and method
View Patent ↗A computer system ( 200 ) includes a baseboard ( 202 ) having a first side ( 201 ) and a second side ( 203 ), where the first side and the second side define a first key opening ( 205 ) and a second key opening ( 207 ). A mezzanine card interface ( 208 ) is coupled to the baseboard. A keying mechanism ( 219 ) is coupled to interface with the baseboard through the first key opening, where coupling the keying mechanism to the baseboard initiates a first key signal ( 225 ), and where the first key signal operates a logic circuit ( 229 ) to permit a first operating voltage ( 218 ) to power the mezzanine card interface. Alternatively, the keying mechanism can be coupled to interface with the baseboard through the second key opening, where coupling the keying mechanism to the baseboard initiates a second key signal ( 227 ), and where the second key signal operates the logic circuit to permit a second operating voltage ( 220 ) to power the mezzanine card interface. This configuration mechanism is repeated for any other mezzanine card interfaces on the baseboard. The logic circuit ( 229 ) disallows the application of operating voltages to the mezzanine card interfaces if the configurations are not compatible with the architecture of the baseboard. In the event of incompatible configurations, the logic circuit also communicates a configuration failure signal to the operator or system manager.
1. A computer system, comprising:
a baseboard having a first side and a second side; wherein the first side and the second side define a first key opening;
a first key pad located on the first side, wherein the first key pad is grounded;
a second key pad located on the second side, wherein the second key pad is aligned with the first key pad via the first key opening, wherein the second key pad is coupled to a first voltage source, and wherein the second key pad is electrically isolated from the first key pad;
a mezzanine card interface coupled to the baseboard; and
a keying mechanism coupled to interface with the baseboard through the first key opening, wherein coupling the keying mechanism to the baseboard shorts the second key pad to the first key pad and initiates a first key signal, and wherein the first key signal operates to permit a first operating voltage to power the mezzanine card interface.
2. The computer system of claim 1 , further comprising:
the first side and the second side defining a second key opening;
a third key pad located on the first side, wherein the third key pad is grounded;
a fourth key pad located on the second side, wherein the fourth key pad is aligned with the third key pad via the second key opening, wherein the fourth key pad is coupled to a second voltage source, and wherein the fourth key pad is electrically isolated from the third key pad; and
the keying mechanism coupled to interface wit the baseboard through the second key opening, wherein coupling the keying mechanism to the baseboard shorts the third key pad to the fourth key pad and initiates a second key signal, and wherein ,the second key signal operates to permit a second operating voltage to power the mezzanine card interface.
3. The computer system of claim 1 , wherein the baseboard is one of a VMEbus board, AdvancedTCA board, APS board and CompactPCI board.
4. The computer system of claim 1 , wherein the mezzanine card interface is a common mezzanine card interface.
5. The computer system of claim 1 , wherein the mezzanine card interface is a PCI mezzanine card interface.
6. A baseboard, comprising:
the baseboard having a first side and a second side; wherein the first side and the second side define a first key opening;
a first key pad located on the first side; wherein the first key pad is grounded;
a second key pad located on the second side, wherein the second key pad is aligned with the first key pad via the first key opening, wherein the second key pad is coupled to a first voltage source, and wherein the second key pad is electrically isolated from the first key pad;
a mezzanine card interface coupled to the baseboard; and
a keying mechanism coupled to interface with the baseboard through the first key opening, wherein coupling the keying mechanism to the baseboard shorts the second key pad to the first key pad and initiates a first key signal, and wherein the first key signal operates to permit a first operating voltage to power the mezzanine card interface.
7. The baseboard of claim 6 , further comprising:
the first side and the second side defining a second key opening;
a third key pad located on the first side, wherein the third key pad is grounded;
a fourth key pad located on the second side, wherein the fourth key pad is aligned with the third key pad via the second key opening, wherein the fourth key pad is coupled to a second voltage source, and wherein the fourth key pad is electrically isolated from the third key pad; and
the keying mechanism coupled to interface with the baseboard through the second key opening, wherein coupling the keying mechanism to the baseboard shorts the third key pad to the fourth key pad and initiates a second key signal, and wherein the second key signal operates to permit a second operating voltage to power the mezzanine card interface.
8. The baseboard of claim 6 , wherein the baseboard is one of a VMEbus board, AdvancedTCA board, APS board and CompactPCI board.
9. The baseboard of claim 6 , wherein the mezzanine card interface is a common mezzanine card interface.
10. The baseboard of claim 6 , wherein the mezzanine card interface is a PCI mezzanine card interface.
11. A method of selecting an operating voltage, comprising:
providing a baseboard having a first side and a second side, wherein the first side and the second side define a first key opening and a second key opening, wherein the first key opening corresponds to a first operating voltage, and wherein the second key opening corresponds to a second operating voltage;
if a keying mechanism is coupled to the baseboard through the first key opening, a first key signal operating to permit the first operating voltage to power a mezzanine card interface; and
if the keying mechanism is coupled to the baseboard through the second key opening, a second key signal operating to permit the second operating voltage to power the mezzanine card interface.
12. The method of claim 11 , further comprising:
providing a first key pad located on the first side, wherein the first key pad is grounded;
providing a second key pad located on the second side, wherein the second key pad is aligned with the first key pad via the first key opening, wherein the second key pad is coupled to a first voltage source, and wherein the second key pad is electrically isolated from the first key pad; and
shorting the second key pad to the first key pad to initiate the first key signal.
13. The method of claim 11 , further comprising:
providing a third key pad located on the first side, wherein the third key pad is grounded;
providing a fourth key pad located on the second side, wherein the fourth key pad is aligned with the third key pad via the second key opening, wherein the fourth key pad is coupled to a second voltage source, and wherein the fourth key pad is electrically isolated from the third key pad; and
shorting the third key pad to the fourth key pad to initiate the second key signal.
14. The method of claim 11 , wherein the baseboard is one of a VMEbus board, AdvancedTCA board, APS board and CompactPCI board.
15. The method of claim 11 , wherein the mezzanine card interface is a common mezzanine card interface.
16. The method of claim 11 , wherein the mezzanine card interface is a PCI mezzanine card interface.
17. A method-of configuring a baseboard to power a mezzanine card interface, comprising:
the baseboard having a first side and a second side, wherein the first side and the second side define a first key opening and a second key opening, wherein the first key opening corresponds to a first operating voltage, and wherein the second key opening corresponds to a second operating voltage;
if a keying mechanism is coupled to the baseboard through the first key opening, a first key signal operating to permit the first operating voltage to power the mezzanine card interface; and
if the keying mechanism is coupled to the baseboard through the second key opening, a second key signal operating to permit the second operating voltage to power the mezzanine card interface.
18. The method of claim 17 , further comprising:
providing a first key pad located on the first side, wherein the first key pad is grounded;
providing a second key pad located on the second side, wherein the second key pad is aligned with the first key pad via the first key opening, wherein the second key pad is coupled to a first voltage source, and wherein the second key pad is electrically isolated from the first key pad; and
shorting the second key pad to the first key pad to initiate the first key signal.
19. The method of claim 17 , further comprising:
providing a third key pad located on the first side, wherein the third key pad is grounded;
providing a fourth key pad located on the second side, wherein the fourth key pad is aligned with the third key pad via the second key opening, wherein the fourth key pad is coupled to a second voltage source, and wherein the fourth key pad is electrically isolated from the third key pad; and
shorting the third key pad to the fourth key pad to initiate the second key signal.
20. The method of claim 17 , wherein the baseboard is one of a VMEbus board, AdvancedTCA board, APS board and CompactPCI board.
21. The method of claim 17 , wherein the mezzanine card interface is a common mezzanine card interface.
22. The method of claim 17 , wherein the mezzanine card interface is a PCI mezzanine card interface.