'DePicture' Touch-screen Tablet Baseboard Specification

Specifications are subject to change and is provided as guidance only

Board Features
Feature		Specification	Fitted
Module		Simtec IM-D20 module socket
Video		URT LCD Display with touch panel	Optional 5.7"
Peripherals	USB	Host ports	2
		Device port - replaces one host, on-board software termination	1
	Serial	RS232 with full control signals	1
		LVTTL with control signals	1
	SD/MMC	Full SD slot with card detect
	Ethernet	Standard IEEE 802 10/100 Mbit interface provided by a DM9000A controller.
	ZigBee	Standard IEEE 802.15.4 low power networking provided by a Jennic JN5139r1 module.	Optional
	Audio	TLV320AIC23 codec
		Simple mono speaker amplifier
	ADCs	With potentiometers	2
	RTC	External battery input 1.8 - 3.6V
	Accelerometer	Bosch SMB320
JTAG		All necessary JTAG signals to communicate with the 2440 and system CPLD.
Power		Single 5V input (also powerable from USB device port)
Dimensions		Eurocard sized with cutouts for LCD wiring. (100mm x 160mm)

Power Usage

Practical worst-case measurement of a full-specification board with all options power usage, with a gold specification IM2440D20, its CPU running at 400MHz and 256MB of memory clocked at 133MHz, playing sound, accessing the network and with the screen at full brightness gives a current consumption of 750mA at 5V (3.75W) . Slowing the CPU and using the Digital Voltage Scaling (DVS) system can substantially reduce this, as can turning the ethernet off and not playing sounds as loudly or at all. In addition Linux allows for complete suspend to RAM which can reduce standby power usage to very low levels.

All figures are subject to a 1% measurement accuracy and are for guidance purposes only.

Other pages

• Introduction - A general introduction to the 'DePicture' Touch-screen Tablet Baseboard.
• Availability - Price and availability.
• Resources - Documentation and software resources for the 'DePicture' Touch-screen Tablet Baseboard.
• Gallery - Images of the 'DePicture' Touch-screen Tablet Baseboard.