Product Data Sheet / Brochure

Table Of Contents
Technical Reference
30
2.2.4.5.4 Power Switch Pins
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.
2.2.4.6 SDXC Card Reader
The board has a full-sized Secure Digital (SD) card reader that supports the Secure Digital
eXtended Capacity (SDXC) format, 4.0 specification, UHS-II bus speed.
Table 24. SDXC Card Reader Connector
Pin
Signal Name
1
CD/DAT3
2
CMD
3 VSS1
4
VDD1
5
CLK
6
VSS2
7
DAT0/RCLK+
8
DAT1/RCLK-
9
DAT2
10* VSS3
11* D0+
12*
D0-
13*
VSS4
14*
VDD2
15* D1-
16*
D1+
17*
VSS5
NOTE
*Pins 10-17 added with UHS-II v4.0 specification. Not present on all SD cards.
2.2.4.7 Power Supply Connector
The board has the following power supply connector:
External Power Supply the board can be powered through a 19 V DC (±10%) connector on
the back panel. The back-panel DC connector is compatible with a 5.5 mm/OD (outer
diameter) and 2.5 mm/ID (inner diameter) plug, where the inner contact is +19V DC and the
shell is GND. The maximum current rating is 10 A.
NOTE
External power voltage, 19 V DC, is dependent on the type of power adapter used.