Техническая Спецификация для Intel C2550 FH8065401488912
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FH8065401488912
Intel
®
Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
553
Volume 2—8259 Programmable Interrupt Controller (PIC)—C2000 Product Family
Architectural Overview
29.2.3
Operation Command Words (OCW)
These command words reprogram the interrupt controller to operate in various
interrupt modes:
• OCW1 masks and unmasks the interrupt lines.
• OCW2 controls the rotation of interrupt priorities when in rotating priority mode
• OCW2 controls the rotation of interrupt priorities when in rotating priority mode
and controls the EOI function.
• OCW3 sets up the ISR/IRR reads, enables/disables the Special Mask Mode (SMM),
and enables/disables the polled interrupt mode.