Printer Fault Interrupt Control Register - Motorola MVME1X7P Programmer's Reference Manual

PCCchip2

Printer FAULT Interrupt Control Register

ADR/SIZ
BIT
3
NAME
OPER
RESET
3-40
23 22 21
PLTY E/L* INT
R/W R/W
0 PL 0 PL 0 PL
IL2-IL0 These three bits select the interrupt level for the printer
FAULT. Level 0 does not generate an interrupt.
ICLR In edge-sensitive mode, writing a logic 1 to this bit clears
the INT status bit. This bit has no function in level-
sensitive mode. This bit is always read as zero.
IEN When this bit is high, the interrupt is enabled. The
interrupt is disabled when this bit is low.
INT When this bit is high, a printer FAULT interrupt is being
generated at the level programmed in IL2-IL0 (if
nonzero).
E/L* When this bit is high, the interrupt is edge-sensitive. The
interrupt is level-sensitive when this bit is low.
PLTY When this bit is low, interrupt is activated by a falling
edge/low level of the PRFAULTI* pin.
When this bit is high, interrupt is activated by a rising
edge /high level of the PRFAULTI* pin.
Note that if this bit is changed while the E/L* bit is set (or
is being set), a FAULT interrupt may be generated. This
can be avoided by setting the ICLR bit during write cycles
that change the E/L* bit.
$FFF42031 (8 bits)
20 19
IEN ICLR
R R/W C
0 PL 0 PL
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18 17 16
IL2 IL1 IL0
R/W R/W R/W
0 PL 0 PL 0 PL