Push Buttons; Expansion Slot - Atmel AT91SAM9G45-EKES User Manual

Board Description
4.2.14

Push Buttons

The SAM9G45-EKES is equipped with two system push buttons, two user push buttons and one joy-
stick. The push buttons consist of momentary push button switches mounted directly to the board. When
any switch is depressed, a low (zero) appears at the associated input pin.
System push buttons:
– Reset, perform system reset
– Wakeup, perform system wake up
User push button:
– Right click
– Left click
Joystick:
– One touch, 5-way switching,
– Normally open momentary contacts,
– Push down to select in any position.
Figure 4-18.
4.2.15

Expansion Slot

GPIO1 & GPIO2, LCD signals (PIO E) are routed to the connectors extension J23
All I/Os of the SAM9G45 Image Sensor Interface are routed to connectors J17
Touch screen signals and analog I/O are connected to J18
This allows the developer to extend the features of the board by adding external hardware components
or boards.
4-22
6481B–ATARM–27-Nov-09
Push Buttons
NRST
WAKE UP
RIGHT CLICK
LEFT CLICK
3V3
VDDBU
R13 R13 R14 R14
100K 100K 1K 1K
BP1 BP1
NRST
BP2 BP2
WAKE UP
BP4 BP4
PB7
C220 C220
R142 R142
100R 100R
10nF 10nF
BP5 BP5
PB6
C221 C221
R143 R143
100R 100R
10nF 10nF
AT91SAM9G45-EKES User Guide