Kontron COMe-cXLi2 - Manual (Page 52)

Kontron COMe-cXLi2 User’s Guide
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to 100k Ohm).
2) The maximum length for SDIO signals on the baseboard is 80mm
3) SDIO boot is supported on baseboards that conform to the maximum
length
specification for SDIO (80mm).
5.4 Watchdog
This feature is implemented within an I 2 C Watchdog and offers a single-stage
watchdog. You can configure the Watchdog Timer (WDTimer) using the JIDA32
Library API (Refer to Appendix: JIDA Standard), or through the BIOS setup, or
directly through register settings. The application software should strobe
the WDTrigger to prevent a timeout. The WDTrigger resets and restarts the
system after a timeout to provide a way to recover from program crashes or
lockups.
The Watchdog can be enabled through:
» BIOS Setup (with BIOS NOW1R113 or newer)
» JIDA32 or K-Station
» Direct programming over register settings
The Watchdog can be triggered through
» JIDA32 or K-Station
» Direct programming (i.e., writing data into one register of the CPLD)
For information about programming this feature, see the JIDA32/K-Station
driver packet in the Kontron Customer section or contact your local sales
support representative to get an application note about low level
programming.
5.5 General Purpose Input and Output (GPIO)
The COMe-cXLi2 COM provides eight GPIOs that can be accessed through the
module connector described in the Pin-out Lists, Section 0. The GPIO
interface is shared with SDIO signals and can be enabled in BIOS setup for
either GPIO or SDIO.
Note: GPIO cannot drive applications faster than 2msec. Data transfer
rates up to 1 kHz maximum are recommended.
Table 13: GPIO COM Express Pin-Outs
Bit of GPIO
Port0
Function COM Express Pin
0 GPI0 A54