•
During power up 0.9 A max.
•
In an idle condition 0.13 A typical
•
During read/write access 0.42 A typical
Values are taken from the Fujitsu MHT 2060 AT datasheet
•
With an onboard compact flash drive please add 0.1 A to the +5 V current
•
For keyboard, mouse, etc. please add 0.1 A (typical) to the +5 V current
•
Connectors P1680, P2001, and P4200 provide fused VCC voltage (+5 V).
The total current drawn from this source may not exceed 1.0 A
Onboard Lithium Battery
Not powered by the system
BR1225 (50 mAh), estimated life time depending on temperature and power
status. The diagram below shows discharge if board is not powered from the
system, i.e. if battery has to supply all current for the clock circuits.
0,0
2,0
4,0
6,0
8,0
10,0
12,0
14,0
16,0
25
35
45
50
55
65
75
Te m p [°C]
Lo
a
d [
µ
A
]
measured
"+20%"
Figure 17: Battery current versus temperature
At temperatures lower than +25 °C use the value at 25 °C. Actually power
usage is lower, which means longer operational lifetime for the battery.
All values were taken at 40 % RH (relative humidity).
Using the values of the diagram above (Battery current versus temperature)
lifetime of the battery can be derived from the diagram below (Battery current
versus time).
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