User guide

Hardware Description
3-82 Copyright © 2003-2010 ARM Limited. All rights reserved. ARM DUI 0224I
Figure 3-35 SCI block diagram
You can set the Smart Card interface voltage to operate at 5V, 3.3V or 1.8V by setting
jumpers on J27 (for SCI0) and J50 (for SCI1).
• Connect pins AB for 3.3V operation
• Connect pins CB for 5V operation
• omit the link for 1.8V operation.