Technical information

Chapter 2: Developer Board and Interfaces Description
August 31, 2009 G24/H24 - Developer’s Kit 27
The GPIO switches have two positions: Logic High (left position, marked with "H") and Logic
Low (Right position, marked with "L"). When setting a switch to "H" (default position), the
GPIO line is not connected (uses the internal G24/H24 pull-up resistor), when setting the GPIO to
"L", the line is being shorted to ground.
Caution: In order to avoid unnecessary load on one of the GPIO lines, verify that when a
GPIO line is configured as an output and is set to logic High state, the
corresponding GPIO switch is set to "H".
UID - S170
The UID S170 switches are used for development purpose only.
Figure 2-16 shows the UID switches provided on the Developer Board, which are located on the
S170 component.
Figure 2-16: S170 Switches
General Function Switch - S140
Figure 2-17 shows the S140 switches.
Figure 2-17: S140 Switches
S140