GE IC754CSF15CTD, Руководство пользователя по оборудованию

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4-38
15" QuickPanel* View & QuickPanel Control Loaded Color TFT
– December 2011
GFK-2402D
4
Memory
The QuickPanel View/Control supports a variety of memory subsystems to
ensure the requirements of your application are met. All system memory is
tied directly to the microprocessor‘s address and data busses for fastest
access. To increase DRAM by up to 64 MB, a 100-pin DIMM memory
expansion slot is also included.
Flash Memory
This 64 MB block of non-volatile memory is the main long-term program
storage for the QuickPanel View/Control, operating like a virtual hard drive
from the point of view of Windows CE. It is divided into two areas, of which
only one is accessible from Windows CE Explorer. The Flash Storage
folder represents a 48 MB block of memory available for long-term storage
of user application programs. Another 16MB block is used to store the
Windows CE operating system, and is not directly accessible from Windows
CE Explorer.
The operating system and all user application programs are transferred from
Flash to DRAM for execution. Any user additions to the
Windows folder
are retained in Flash Storage when the Backup utility is run.
FLASH memory has a limited write-cycle lifetime. That is, the physical
memory devices wear out after approximately 100,000 cycles (minimum), so
it is advisable to limit file operations such as copy, delete, etc.
The write cycle is much slower for FLASH than it is for other portions of
RAM, therefore FLASH is not recommended for the storage of program
variables, or any data items whose values are dynamic.
Flash memory can optionally be added with an external flash device such as
a CF card or USB thumb drive. These devices will appear as the
PCFlash Storage folder or USB Storage , respectively.