User`s manual

UC-7400-CE User’s Manual Introduction

Storing Data in RAM vs. Flash Memory

Although data saved in RAM will be deleted when the system shuts down, RAM storage has the

advantage of faster read/write access and no life cycle issue.

For applications where important data is transmitted immediately and directly to a host, you can

store the necessary log data in RAM. After the host receives the data, the data does not need to be

retained and can be deleted.

Embedded computers have resource limits, so integrators need to determine when it is critical that

data be stored on one of the file systems. When it is necessary for data to be stored, the appropriate

file system should be used.

Hive-Based Registry

The registry for the UC-7400-CE is a hive-based registry, instead of a RAM-based registry. The

hive-based registry stores registry data inside files, or hives, which can be kept on any file system.

This removes the need for performing backup and restore on power off.

Inserting a CompactFlash Card

The UC-7400-CE (except for the UC-7410-CE) is equipped with a type II CompactFlash slot that

supports cards of both types I and II. Since mass storage cards are considered to be standard

attachments, when an empty mass storage card is inserted in the slot, the computer automatically

formats it in FAT format. Note that the formatting process takes a few minutes to complete. When

a mass storage card is inserted, the UC-7400-CE creates a directory named “CFFloder” under the

root directory. For programming purposes, use “CFFloder” to link to the directory.

The following CompactFlash products have been verified compatible with the embedded

computer:

Manufacturer Size S

eed

PRETEC 128 MB

SanDisk Ultra II 1 GB

Transcend 2 GB 45X

Transcend 2 GB 80X

Transcend 4 GB 80X

ATTENTION

If your CompactFlash card is not detected when the system boots up, try the following:

(a) Remove the CompactFlash card and insert it again.

(b) Turn the embedded computer off and turn it on again.

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