PC Concepts SHG2 DP - Manual (Page 43)

Intel® SHG2 DP Server Board Technical Product Specification Server Management
Revision 1.0 Intel Order Number C11343-001 31
Pin ADM1026 Signal Name Type External Signal Name / Function
active low output with a 200 ms minimum pulse width. This is
asserted whenever 3.3VSTBY is below the reset threshold. It
remains asserted for approx. 200ms after 3.3VSTBY rises
above the reset threshold.
30 P5VIN Analog Input VP50 / Monitors +5 V supply
31 N12VIN Analog Input XN12 / Monitors -12 V supply
32 P12VIN Analog Input XP12 / Monitors +12 V supply
33 VCCP Analog Input VCC_P / Monitors processor core voltage (0 to 3.0 V)
34 AIN7 Analog Input ADM_VCC25 / Monitors +2.5V supply
35 AIN6 Analog Input VDD15 / Monitors VTT supply
43 GPIO15 Digital Input CPU2_THERMTRIPN / CPU2 Thermal Trip
44 GPIO14 Digital Input CPU1_THERMTRIPN / CPU1 Thermal Trip
45 GPIO13 Digital Input CPU2_PROCHOTN / CPU2 Processor Hot
46 GPIO12 Digital Input CPU1_PROCHOTN / CPU1 Processor Hot
47 GPIO11 Digital Input SC1TERMOFF+00 / SCSI Channel A Termination Off
48 GPIO10 Digital Input SC2TERMOFF+00 / SCSI Channel B Termination Off
Eight-bit ‘analog’ readings for the following system temperatures are provided, described in
Table 19.
Table 19. Temperature Sensors
Temperature Sensor Description Resolution Accuracy
Primary Processor Primary processor socket thermal sensor 8-bit +/- 5°C or better
Secondary Processor Secondary processor socket thermal sensor 8-bit +/- 5°C or better
5.2 System Reset Control
Reset circuitry on the Intel SHG2 server board looks at resets from the front panel, CSB5, in-
target probe (ITP), and the processor subsystem to determine proper reset sequencing for all
types of resets. The reset logic is designed to accommodate a variety of ways to reset the
system, which can be divided into the following categories:
• Power-up reset
•
Hard reset
• Soft (programmed) reset
The following subsections describe each type of reset.
5.2.1 Power-up Reset
When the system is disconnected from AC power, all logic on the server board is powered off.
When a valid input (AC) voltage level is provided to the power supply, 3.3-volt standby power
will be applied to the server board. A power monitor circuit on 3.3-volt standby will assert
BMCRST_L, causing the BMC to reset. The BMC is powered by 3.3 volt standby and monitors
and controls key events in the system related to reset and power control.