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Chapter 2 Product Overview
MightyBoard 821 Reference Manual 11
Jumper Definitions
Table 2-4 describes the jumpers shown in Figure 2-4 on page 10.
Table 2-4. Jumper Settings
Note: *The jumper or shunt may be stored by connecting it to one of the pins for safe keeping.
Specifications
Power Specifications
Tables 2-5 and 2-6 list the power requirements for the MightyBoard 821 with 1.5 and 2.0 GHz CPUs.
Operating configurations:
• In-rush operating configuration includes 512MB DDR RAM, ATX power, CRT monitor, two SATA
HDDs and one IDE HDD each with WinXP Pro, keyboard and mouse.
• Idle operating configuration includes the same items as the in-rush configuration.
• BIT* = Burn-In-Test. Operating configuration includes Idle configuration as well as one serial port with
loop-back, one parallel port with loop-back, two Ethernet connections, and four external USB flash
drives.
Jumper # Installed Removed/Installed
JP1 – CMOS Normal/Clear Normal (pins 1-2) Default Clear (pins 2-3)
JP2 – CPU Voltage Select 1.5V/533 FSB CPU (pins 1-2) 1.8V/400 FSB CPU (removed)
JP3 – Serial 3 (COM3) RS-485
Termination
Termination (pins 1-2) No Termination (removed)
*Default
JP3 – Serial 4 (COM4) RS-485
Termination
Termination (pins 3-4) No Termination (removed)
*Default
JP4 – LVDS Voltage Select Enable +3.3V (pins 1-2) Default Enable +5V (pins 2-3)
JP5 – Inverter Voltage Select +5V (pins 1-2) +12V (pins 2-3)
Table 2-5. System Power Requirements (1.5 GHz CPU)
Parameter +12.0VDC
In-rush Current
(Typical)
Max: 8.00A (96.00W)
Min: 0.28A (3.36W)
Idle 1.20A (14.38W)
BIT* Current
(Typical)
1.54A (18.47W)