Force Computers PENT/CPCI-721, Руководство по установке

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PENT/CPCI-720/2/3 Registers Maps and Registers
6 - 10 PENT/CPCI-721
ENUM# Interrupt Control Status Register CPCI Bus A
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 11.
Table 19: ENUM# Interrupt Control Status Register A
Address: 0112
16
Bit Value Description Access Settings
0 ENUM Shows logic level of ENUM
signal at the CompactPCI
backplane. r = 0
ENUM 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 the status of the
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 Undefined