TME-EPIC-HURQM-R2V1.docx
Revision 2.1
Page 28 of 52
3.14
LPC Bus
The PCH implements an LPC (Low Pin Count) interface, which is supported via this connector.
LPC Connector (X4)
Connector Type: DF13 12 pin header 1.25 mm
Caution
The maximum current on the supply pin is 0.3A!
3.15
LEMT function
The onboard Microcontroller implements power sequencing and LEMT (LiPPERT Enhanced Management
Technology) functionality. The microcontroller communicates via the System Management Bus with the
CPU/Chipset. The following functions are implemented:
•
Total operating hours counter
Counts the number of hours the module has been run in minutes.
•
On-time minutes counter
Counts the seconds since last system start.
•
Temperature monitoring of CPU and Board temperature
Minimum and maximum temperature values of CPU and board are stored in flash.
•
Power cycles counter
•
Watchdog Timer
Set / Reset / Disable Watchdog Timer.
•
System Restart Cause
Power loss / Watchdog / External Reset.
•
Fail-Safe-BIOS Support
In case of a Boot failure, hardware signals tells external logic to boot from Fail-Safe-BIOS.
•
Flash area
1kB Flash area for customer data
Pin
Signal
1
+3V3
2
LPC_AD0
3
LPC_AD1
4
LPC_AD2
5
LPC_AD3
6
n.c.
7
LPC_FRAME#
8
PCI_RST#
9
CLK_33_FWH
10
GND
11
INT_SERIRQ
12
LPC_DRQ#
