User manual

GHI Electronics,LLC Embedded Master User Manual
Embedded Master Architecture
3.2. LPC2468/78 Microcontroller
The LPC2468/78 72Mhz ARM7 32-bit processor is the core of Embedded Master Module.
The LPC2468 contains a memory acceleration interface with 128-bit internal FLASH
memory. This lets the processor core run with zero wait states. Comparing to executing
code from 16-bit external FLASH we see over 10 times the execution speed. The internal
FLASH is 0.5MB that is used to run the complete .NET Micro Framework core very
efficiently. Also, the processor includes an RTC that can operate while while the processor
is off. Embedded Master Module already has the needed circuitry to run the RTC. Users
only need to add a battery or a super capacitor to VBAT pin.
Further more, LPC2468 has a wide range of peripherals that adds a lot of functions and
features to Embedded Master such as PWM, GPIO, LCD Controller, USB HC ...etc.
While keeping all the great features. The TFT version also adds a built-in support to TFT
displays.
3.3. SDRAM
8MB of SDRAM come standard with Embedded Master Module. This is more than enough
for applications using .NET Micro Framework and SideShow.
3.4. FLASH
4MB of external flash is available on Embedded Master Modules. This doesn't include the
0.5MB internal flash used for Micro Framework CLR execution. External flash is used for
system assemblies, boot loader, user deployment and EWR storage.
about 1MB of the external FLASH is used for boot loader, system assemblies and other
internal GHI resources. About 3MB is reserved for deployed managed applications,
including resources. 256KB is reserved for EWR two regions, each region is 128KB and
one of them is reserved for CLR use.
EWR (Extended Week References) is a way for managed applications to store data on
FLASH memory. Stored data have priorities, if more data needs to be stored and flash
EWR region is full, some data of lower priority data will be overwritten. Consult .NET Micro
Framework documentation for more details.
If more storage is needed, SD memory cards and/or USB memory devices can be used.
EWR do not work with removable media devices.
3.5. GHI Extended Features
Embedded Master adds features to the .NET Micro Framework, such as embedded USB
host stack, devices like mice , keyboards, joysticks, printers, Bluetooth dongles and more
can be access from user's managed code. Other hardware classes are provided to support
the many available peripherals such as ADC, DAC, PWM and more.
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