Specifications

VSBC-6862 Rev 1.43
84
5.5. Power description
For the majority of the applications, the VSBC-6862 uses only the +5V power supply.
Internally, many modules use 3.3V, and the MPC-8260 use also 2.5 or 2.0V.
The internal 3.3V, and 2.5V or 2.0V voltages are generated on-board.
An internal power fail monitor generates a Power-On Reset signal when the +3.3V line fall below
2.97V.
The +12V is used for special protection feature on Flash memory (optional) and some IP modules.
The -12V is only used by some IP modules.
The +5V STDBY is used for the backup of the SRAM memory. (1MByte)
This line need 0.15 mA when the board is powered-on, and 0.5 mA when the board is powered-off.
All IP modules power lines are filtered, and fuse protected.
A power fail logic monitors if the +5V voltages are present on the IP slots.
If one of these voltages is not detected, the PowerLed on front panel is then OFF.
You have to check the cause of the problem and make the relevant correction.
5.6. Power consumption
This chapter will discuss of VSBC-6862 power consumption without IP modules.
Each IP module can consume 5V, +12V and/or -12V.
Device Consumption 3.3V Consumption 5V
MPC 8260 @ 200MHz 900 ---
Programmable logic: 2 x Lattice 1100 ---
Flash memory 200 ---
SDRAM 500 ---
SRAM 100
Fast Ethernet transceivers 300 ---
Communication port transceivers 400 ---
Real Time Clock 60 ---
VME and internal buffers 500 200
Oscillators 30 ---
LEDs 64 ---
Total 4154 200
For the 200MHz version:
Total estimated power = 4.154 x 3.3 + 0.200 x 5 = 14.7 W
Typical measured power, running ECMon, no activity = 1.8 x 5 = 9 W
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