Technical product specification

Technical Reference

NOTE

The LED behavior shown in Table 31 is default – other patterns may be set via BIOS setup.

2.2.4.4.4 Power Switch Header

Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The switch

must pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or

off. (The time requirement is due to internal debounce circuitry on the board.) At least two

seconds must pass before the power supply will recognize another on/off signal.

2.2.4.5 Low Speed Custom Solutions Header (2.0 mm Pitch)

The Low Speed Customs Solution header is designed to expose access to platform-level signals,

enabling custom development of solutions based on such signals.

• 1.8 Vstby, 3.3 Vstby and 5 Vstby: can be used to power custom solution (such as

daughtercard, etc.) with up to 2 A of current rating capability per each of these voltages. Pins

can also be used to monitor the presence of 1.8 V, 3.3 V and 5 V standby power. Standby

power is always on, even when board power is off.

• HDMI Consumer Electronics Control (CEC): standard communication signal from the HDMI

connector (http://www.hdmi.org/

). There is no HDMI CEC controller onboard; rather, the

HDMI CEC signal is exposed through this header for third party solutions to monitor/control

CEC activity between multiple HDMI devices.

• DMIC_CLK, DMIC_DATA: clock output and data I/O for digital microphone interface; allows

connection of a Digital Microphone.

• SCI/SMI GPIO: input signal for direct connection to a signal (such as a front panel push-

button) capable of triggering an OS-level command in Windows (formerly referred to by

Microsoft as Direct Application Launch*). Voltage level I/O for this pin is 3.3 V. Refer to below

URL for accompanying utility to map triggered event to Windows file.

• https://downloadcenter.intel.com/Detail_Desc.aspx?lang=eng&DwnldID=22035

• PWM[x]: Pulse-width modulation (PWM) signals that can be used to control analog loads,

such as motors or fans. Power rating capability per each PWM signal is 5V at 250mA.

• I2Cx_CLK, I2Cx_DATA: Inter-Integrated Circuit (I

C) bus interface signals that allow connection

of low-speed peripherals. Voltage level I/O for these pins is 3.3V. An I

C bus specification and

user manual may be found at http://www.nxp.com/documents/user_manual/UM10204.pdf

• SMB_CLK, SMB_DATA, SMB_ALERT#: System Management Bus (SMBus) interface signals.

Voltage level I/O for these pins is 3.3 V. General SMBus information can be found on the

platform EDS and at http://smbus.org/specs/