User guide

User Guide CC3-CAJUN • Low Power CompactPCI CPU
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 Hamm • Germany
Tel. [phone] • Fax. [phone] • [e-mail] • www.ekf.com
Local GPIO Header (Option)
Both GPIO signals are 5V TTL with internal 50k PU resistors, 24mA sink capability, controlled by
the on-board SIO IT8761E.
Speaker Header (Option)
Warning: The +5V pin is protected against a short circuit situation by a 0.1A PolySwitch. The
JSPK connector should be used exclusively for direct attachment of a dynamic speaker device.
When connecting to the input of a sound card, most likely a short-circuit situation will occur
between the +5V pin of the JSPK connector and the GND pin of the audio-card input, which
could cause permanent damage to the CC3-CAJUN and the audio board, despite the PolySwitch
resettable fuse. A workaround to this would be to place a 1k resistor across pin 1 and pin 2 of
the JSPK connector, and strapping a single wire cable from JSPK pin 2 to the audio input.
RTC/CMOS Reset Jumper (Option)
If stuffed, the jumper JRTC can be used to clear the CMOS contents and to reset the RTC
registers. Remove jumper for normal operation.
PGPIO
1 GND
2 sio_gpio16
3 sio_gpio17
1
JSPK
1 +5V
2 Speaker
1
JRTC
1 RTCRST#
2 GND
1