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Board Description and Memory Maps
Presence Detect Register
The MVME5500 board contains a presence detect register that may be read by the system software to determine the presence of optional devices.
Table 1-10. Presence Detect Register
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| Presence Detect Register - 0xF1100004 |
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BIT | 7 | 6 |
| 5 | 4 | 3 | 2 | 1 | 0 |
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FIELD |
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| L |
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| RSVD | RSVD |
| IPMC_PRSNT | EREADY1 | EREADY0 | PCIE_PRSNT_ | PMC1P_L | PMC0P_L |
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OPER | R |
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RESET | X | X |
| X | X | X | X | X | X |
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IPMC_PRSNT
IPMC Module Present. If set (HIGH true), there is PMCspan module installed. If cleared, the PMCspan module is not installed.
EREADY1
EREADY1. Indicates that the PrPMC module installed in PMC slot 2 is ready for enumeration when set. If cleared, the PrPMC module is not ready for enumeration. The PrPMC software must assert EREADY# for this bit to be set. The purpose of EREADY# is to provide a signaling method indicating that a
EREADY0
EREADY0. Indicates that the PrPMC module installed in PMC slot 1 is ready for enumeration when set. If cleared, the PrPMC module is not ready for enumeration. The purpose of EREADY# is to provide a signaling method indicating that a
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