Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

Datasheet, Vol. 2 of 3

September 2014

120

Order Number: 330061-002US

The SoC has an integrated I/O APIC which supports 24 APIC interrupts. Each interrupt 

has its own unique vector assigned by the software. The interrupt vectors are mapped 

as shown in 

.

IRQ0

INTR output of the integrated 8259 PIC

IRQ1

• SERIRQ (1), or
• Keyboard (KBD) Emulation Interrupt

IRQ2

• HPET Timer 0 (if GCFG.LRE is set)
• 8254 Timer (if GCFG.LRE is not set)

1, 2, 3

IRQ3

• SERIRQ (3), or
• UART  COM2

IRQ4

• SERIRQ (4), or
• UART  COM1

IRQ5

• SERIRQ (5)

IRQ6

• SERIRQ (6)

IRQ7

• SERIRQ (7)

IRQ8

• HPET Timer 1 (if GCFG.LRE is set)
• RTC (if GCFG.LRE is not set)

1, 2, 3

IRQ9

• SERIRQ (9), or
• from  SCI  (based  on  ACTL.SCIS and PM1_CNT.SCI_EN registers)

IRQ10

• SERIRQ (10), or
• from  SCI  (based  on  ACTL.SCIS and PM1_CNT.SCI_EN registers)

IRQ11

• SERIRQ (11), or
• HPET Timer 2, or
• from  SCI  (based  on  ACTL.SCIS and PM1_CNT.SCI_EN registers)

4

IRQ12

• SERIRQ (12), or
• Mouse Emulation Interrupt

IRQ13

• P-Unit

IRQ14

• IRQ14 from ISA IDE Interrupt

IRQ15

• SERIRQ (15), or
• IRQ15 from ISA IDE Interrupt

IRQ16

• PIRQA

IRQ17

• PIRQB

IRQ18

• PIRQC

IRQ19

• PIRQD

IRQ20

• PIRQE, or
• from  SCI  (based  on  ACTL.SCIS and PM1_CNT.SCI_EN registers)

3, 4

IRQ21

• PIRQF, or
• from  SCI  (based  on  ACTL.SCIS and PM1_CNT.SCI_EN registers)

3, 4

IRQ22

• PIRQG, or
• from  SCI  (based  on  ACTL.SCIS and PM1_CNT.SCI_EN registers)

3, 4

IRQ23

• PIRQH,  or
• from  SCI  (based  on  ACTL.SCIS and PM1_CNT.SCI_EN registers)

3, 4