User`s guide

AT2LP DDK board User’s Guide
3
DIP switches
Switch Function
SW1-1 ATA_EN.
 OFF (default) = Normal operation
 ON = Disconnect from USB. Tri-state the ATA bus if the
EEPROM configuration is set to tri-state.
SW1-2 DRV_PWR_VALID
 OFF (default) = Normal operation
 ON = Simulate CompactFlash connection
SW1-3 SPARE
SW1-4 LED enable.
 OFF = Disable power LED, GPIO LEDs
 ON (default) = Enable power LED, GPIO LEDs
Pushbutton switches
Button Function
S1 SYSIRQ: Pushing this button will pull up the SYSIRQ line. This line
latches the GPIO pins into the interrupt endpoint. Note that this button
has no function when the GPIOs are used in HID mode.
S2-S7 When the GPIO pins are used as inputs, they are pulled down by
default. These buttons pull the GPIOs high when they are pressed. To
tie the GPIOs high for longer periods of time, use J5, J6, J8, J10, J14
and J15.