ADLINK CoreExpress-ECO2 - Manual (Page 16)

TME-CEM-ECO2-Rev0V4.doc Rev 0.4 Page 12
3.14 External Battery
The board supports a RTC that provides a battery of 3.0 V. A typical battery current in suspend
mode is for the latest ATOM E6xx CPU defined as approx. 24 uA. In S0 mode the RTC is powered by
the power supply.
Recommended battery types are:
Battery Type Capacity
(mAh)
Worst case life time
(years)
CR2032 225 1.1
CR2450 620 2.9
CR2477 1000 4.8
Worst case RTC battery life assuming the processor is always in S5 state.
3.15 On Board LED indicators
LED1: Status
Color: yellow
Function: blink codes (ON) for diagnostics
LED2: Suspend mode (S3-LED)
Color: yellow
Function: Board is in S3 suspend mode (ON)