PC6-TANGO • CompactPCI
®
PlusIO • Intel® Atom™ E39xx Processor (APL-I SoC)
J-GP UEFI/BIOS Defaults & IEEE 1588 Pulse per Second
The jumper J-GP may be used to reset the UEFI/BIOS configuration settings to a default state. The
UEFI/BIOS on PC6-TANGO stores most of its settings in an area within the UEFI/BIOS flash, e.g. the
actual boot devices. Using the jumper J-GP is only necessary, if it is not possible to enter the setup of
the UEFI/BIOS. To reset the settings mount a jumper on J-GP and perform a system reset. As long as
the jumper is stuffed the UEFI/BIOS will use the default configuration values after any system reset. To
get normal operation again, the jumper has to be removed.
There is also an alternate function available on J-GP. Pin 1 of this jumper carries a TTL level Pulse per
Second (PPS) signal according the IEEE 1588 specification when enabled by UEFI/BIOS settings. A wire
may be connected to trigger events on external devices.
NOTE: The PPS TTL level signal is also available via the CompactPCI
®
PlusIO connector J2 pin D14
(SATA-SCL), for rear I/O usage (must be enabled by GPIO27 of the APL-I SoC).
J-GP
Function
Jumper Removed
1)
Normal operation
Jumper Installed
UEFI/BIOS configuration reset performed
1)
This setting is the factory default
1
J-GP
© EKF -62- ekf.com