U E Z G U I - 1 7 8 8 - 7 0 W V M
U s e r ’ s M a n u a l
P a g e
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26
3/20/2024
Copyright ©2024, Future Designs, Inc
Revision 5
19.
Schematics
https://www.teamfdi.com/products/uEZGUI-1788-70WVM/sch/UEZGUI-1788-70WVM-
20.
Temperature Range
UEZGUI-1788-70WVM-BA without LCD: -40°C to +85°C
UEZGUI-1788-70WVM-BA with Microtips UMSH-8596MD-24T LCD: -20°C to +70°C
21.
ESD Warning
The UEZGUI-1788-70WVM-BA kit is shipped in a protective anti-static package. The kit must
not be subjected to high electrostatic potentials. Damage may occur to the boards that will
not be covered under warranty. General practice for working with static sensitive devices
should be followed when working with the kit.
22.
Real Time Clock Backup Time
The µEZ
GUI’s Real Time Clock is backed up with a Seiko Super Capacitor to allow the time to be preserved when
external power is removed. The calculated backup time is shown below.
Super
Capacitor
Typical Voltage
Stop Voltage
Maximum Current
Typical Backup
Time
XH414HG
3.0 V
2.0 V
1µA
18
hrs
23.
Power Requirements
Power is supplied into the power-only USB connector (P2) via a power supply provided in the kit. The power supply
provides 5VDC output at 1.2A (min) and has input voltage range of 100-240VAC with standard U.S. 2-prong plug. The
following typical power requirements were measured at room temperature with LPC1788 at 120MHz clock rate:
Voltage
Booted at the µEZ Demo Screen
Observed Max (video playback)
5V
790 mA
880 mA
The following measurements were taken with a GainSpan GS1011MIP Wi-Fi module loaded on the board and turned
on and connected to an access point.
Voltage
Observed Max (Wi-Fi & video)
Maximum allowed
5V
1100 mA
Up to 2A through µEZ GUI power connectors
µEZ GUI USB Input Port Power Requirements:
•
+5VDC ±5% is the input power range specification. However, since the 5VDC input has reverse diode protection,
it may be necessary to provide a higher input voltage level of 5VDC input to ensure that the uEZGUI 5VDC output
