User`s guide

Signal Pin # Description I/O PU/PD Comment

THRM# B35 Input from off-module temp sensor indicating an over-temp situation. I 3.3V PU 10k 3.3V

THERMTRIP# A35 Active low output indicating that the CPU has entered thermal shutdown. O 3.3V PU 10k 3.3V

SMB_CK B13 System Management Bus bidirectional clock line. I/O 3.3VSB PU 10k 3.3VSB

SMB_DAT# B14 System Management Bus bidirectional data line. I/O OD

3.3VSB

PU 10k 3.3VSB

SMB_ALERT# B15 System Management Bus Alert – active low input can be used to generate an SMI# (System

Management Interrupt) or to wake the system.

I 3.3VSB PU 10k 3.3VSB

LID# A103 Lid button. Used by the ACPI operating system for a LID switch. I OD 3.3V PU 10k 3.3VSB

SLEEP# B103 Sleep button. Used by the ACPI operating system to bring the system to sleep state or to wake it

up again.

I OD 3.3V PU 10k 3.3VSB

Table 16 General Purpose Serial Interface Signal Descriptions

Signal Pin # Description I/O PU/PD Comment

SER0_TX A98 General purpose serial port transmitter O 3.3V Not supported

SER1_TX A101 General purpose serial port transmitter O 3.3V Not supported

SER0_RX A99 General purpose serial port receiver I 3.3V Not supported

SER1_RX A102 General purpose serial port receiver I 3.3V Not supported

Table 17 Power and GND Signal Descriptions

Signal Pin # Description I/O PU/PD Comment

VCC_12V A104-A109

B104-B109

Primary power input: +12V nominal. All available VCC_12V pins on the connector(s)

shall be used.

VCC_5V_SBY B84-B87 Standby power input: +5.0V nominal. If VCC5_SBY is used, all available VCC_5V_SBY

pins on the connector(s) shall be used. Only used for standby and suspend functions.

May be left unconnected if these functions are not used in the system design.

VCC_RTC A47 Real-time clock circuit-power input. Nominally +3.0V. P

GND A1, A11, A21, A31, A41,

A51, A57, A60, A66,

A70, A80, A90, A100,

A110, B1, B11, B21,

B31, B41, B51, B60,

B70, B80, B90, B100,

B110

Ground - DC power and signal and AC signal return path.

All available GND connector pins shall be used and tied to Carrier Board GND plane.