Force Computers PENT/CPCI-721, Руководство по установке

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PENT/CPCI-720/2/3 Registers Maps and Registers
6 - 8 PENT/CPCI-721
ENUM# Interrupt Control Register CPCI Bus B
The ENUM register is used to detect the assertion of the hot swap
ENUM signal. The ENUM signal can either be polled via the register or
an enumeration can cause an interrupt on level 5, 9, 10, or 11 (factory
option).
Note: This function is supported starting from PCB revision 1.0.
Table 17: ENUM# Interrupt Control Status Register B
Address: 0110
16
Bit Values Description Access Settings
0 ENUM Shows the logic level of the
ENUM signal at the Com-
pactPCI backplane. r =0
Signal is asserted.
=1 (default)
ENUM is not
asserted.
1 MASK Masks the ENUM interrupt. r/w = 0 (default)
The ENUM inter-
rupt is masked
and no inter-
rupts will occur.
= 1
The ENUM inter-
rupt is unmasked
and an interrupt
will occur if the
ENUM signal on
the CompactPCI
backplane is
asserted.
2 IRQ Shows status of interrupt
line. r = 0 ( default)
No ENUM inter-
rupt is pending.
= 1
The ENUM inter-
rupt line has
been asserted
and is still active.
3 Reserved Reserved r Undefined