Description
Signal Name
Pi
n
Pi
n
Signal Name
Description
GND
FP_PD1
5
6
FP_PWR_BTN_
N
Power button
Reset button
FP_RST_BTN_N
7
8
FP_PD2
GND
5V supply (VCCV_PS)
9
NC
A.11
Memory Resources
Detailed memory information for addressable memory and memory maps are in the
Intel
®
Communications Chipset 89xx Series Datasheet and in the Intel
®
Xeon
®
and
Intel
®
Core™ Processors For Communications Infrastructure External Design
Specification
A.12
Interrupts
Interrupts can be routed through the I/O xAPIC, which supports 24 interrupts. The I/O
xAPIC is supported by Microsoft OS’s.
Table 28.
I/O xAPIC Interrupt Mapping
1
IRQ
2
Via SERIRQ
Via PCI
Message
System Resource
0
No
No
Cascade from 8259 #1
1
Yes
Yes
2
No
No
8254 Counter 0, HPET #0 (legacy mode)
3
Yes
Yes
4
Yes
Yes
5
Yes
Yes
6
Yes
Yes
7
Yes
Yes
8
No
No
Real-time clock, HPET #1 (legacy mode)
9
Yes
Yes
Option for SCI, TCO
10
Yes
Yes
Option for SCI, TCO
11
Yes
Yes
HPET #2, option for SCI, TCO
3
12
Yes
Yes
HPET #3
4
13
No
No
FERR# logic
14
Yes
Yes
SATA
15
Yes
Yes
SATA
16
PIRQA#
Yes
Internal devices are routable.
17
PIRQB#
18
PIRQC#
19
PIRQD#
continued...
Crystal Forest—Technical Reference
Intel
®
Xeon
®
Processor E3-1125C with Intel
®
Communications Chipset 8910 Development Kit
User Guide
October 2012
44
Order No.: 328009-001US