Advantech SOM-A2552 Power System Requirement, Power Consumption, Symbol Description Min Typ Max

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User’s Manual for Advantech SOM-A2552 series module V1.00

Most users will question the height of SOM structure product. Does product be too thick based on SOM structure product? User could see the answer in the 3rd mechanical drawing. Maximum height of SOM module allied with CSB is 5.20mm. One port USB 1.1 host connector height is 8.37mm, 1 DB-9 RS-232 connector is 12.53mm, 1 type-II CF slot is 8.72mm. So, this is the answer! If users want to use any standard I/O connector on CSB, then SOM structure is not the maximum height maker. The maximum highness is decided by I/O connector, not SOM structure.

1.2.2 Power System Requirement

SOM-A2552 Operating DC value table

Symbol	Description	Min.	Typ.	Max.
SYS_VCC3P	SOM system DC 3.3V DC-in
3	power source	3	3.3	3.6
SYS_VCC	SOM system DC 5.0V DC-in
	power source	4.5	5.5	5.5
BAT_VCC	Back-up power source for RTC &			SYS_VC
	SDRAM	-		C3P3
Input DC Operating Conditions
VIH	Input High Voltage, all standard
	input and I/O pins	0.8*VCC	耟	VCC
VIL	Input Low Voltage, all standard
	input and I/O pins	VSS	耟	0.2*VCC
Output DC Operating Conditions
VOH	Output High Voltage, all standard
	output and I/O pins	VCC-0.1	耟	VCC
VOL	Output Low Voltage, all standard
	output and I/O pins	VSS	耟	VSS+0.4

1.2.3 Power Consumption

In WinCE O.S. environment, SOM-A2552 series products have 3 kinds of operating model :

•Normal mode: I/O and system all work well. All component on SOM-A55x are powered.

•Idle mode: I/O and system all work well except backlight control circuit. In order to do power-saving, LCD backlight control circuit will disable the LCD backlight inverter.

•Suspend mode: all devices are no-powered except SDRAM, RTC(real time clock) & some CPU(PXA255) power pins. In suspend mode, SOM-A255x series are only powered by BAT_VCC pin ( Li-ion 3.0V coin battery from CSB).If user doesn’t design coin battery to power BAT_VCC pin, then Suspend mode doesn’t work on SOM-A55x series products.

About detail power consumption of every SOM-A255x series, please contact with ae.risc@advantech.com.tw.

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