Maps and registers, 1 interrupt structure, Figure 6-1 – Artesyn ATCA-7470 Installation and Use (October 2014) User Manual
Page 141: Interrupt structure on atca-7470, Chapter 6
Chapter 6
ATCA-7470 Installation and Use (6806800P15K)
141
Maps and Registers
6.1
Interrupt Structure
The ATCA-7470 supports NON-APIC (legacy PIC Mode) and APIC mode of Interrupt delivery to
the CPUs. 8259 PIC mode interrupt concentrator inside the Intel Cavecreek PCH supports 16
interrupts (8 external signal inputs). The IO-APIC device inside the Intel Cavecreek PCH
supports 24 interrupt sources. In APIC mode the Intel Cavecreek PCH supports only Front side
bus interrupt delivery (not the serial APIC mode). The following figure summarizes the
interrupt sources and mappings for ATCA-7470. APIC mode is configured through BIOS after
boot-up phase which is done in legacy PIC mode.
Figure 6-1
Interrupt Structure on ATCA-7470