20-101-1196 Rabbit Semiconductor, 20-101-1196 Datasheet - Page 39

• Manufacturer Part Number: 20-101-1196
• Description: MODULE RABBITCORE RCM3900
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-1196

• Module/board Type: MPU Core Module
• For Use With/related Products: RCM3900
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 20-101-1196; 316-1155

4.4.4 microSD™ Cards
The RCM3900 supports a removable microSD™ Card up to 1GB to store data and Web
pages. The microSD™ Card is particularly suitable for mass-storage applications, but is
generally unsuitable for direct program execution.
Unlike other flash devices, the microSD™ Card has some intelligence, which facilitates
working with it. You do not have to worry about erased pages. All microSD™ Cards sup-
port 512-byte reads and writes, and handle any necessary pre-erasing internally.
The microSD™ Card socket on the RCM3900 has a plastic insert when shipped to protect
the socket. This insert must be removed before you will be able to insert a microSD™
Card.
Figure 10 shows how to insert or remove the microSD™ Card. The card is designed to fit
easily only one way — do not bend the card or force it into the slot. While you remove or
insert the card, take care to avoid touching the electrical contacts on the bottom of the card
to prevent electrostatic discharge damage to the card and to keep any moisture or other
contaminants off the contacts. You will sense a soft click once the card is completely
inserted. To remove it, gently press the card towards the middle of the RCM3900 — you
will sense a soft click and the card will be ready to be removed. Do not attempt to pull the
card from the socket before pressing it in — otherwise the ejection mechanism will get
damaged. The ejection mechanism is spring-loaded, and will partially eject the card when
used correctly.
Figure 10. Insertion/Removal of microSD Card
Rabbit recommends that you use the microSD™ Card holder at header J2 only for the
microSD™ Card since other devices are not supported. Be careful to remove and insert
the card as described, and be careful not to insert any foreign objects, which may short out
the contacts and lead to the destruction of your card.
RabbitCore RCM3900 User’s Manual
39