Kontron ETXexpress-AI - Manual (Page 70)

Kontron ETXexpress-AI User’s Guide
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» Direct programming over register settings
The Watchdog can be triggered through
» K-Station
» Direct programming (i.e., writing data into one register of the CPLD)
For information about programming this feature, see the 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.
5.4 General Purpose Input and Output (GPIO)
The ETXexpress®-AI COM provides eight GPIOs that can be accessed through the
module COM Express™ connector described in the pin-out lists, in Chapter 4,
“COM Connectors”.
NOTE: GPIO cannot drive applications faster than 2 msec. Data transfer
rates up to 1 kHz maximum are recommended.
Table 18: GPIO COM Express Pin-Outs
Bit of GPIO
Port0
Function COM Express Pin
0 GPI0 A54
1 GPI1 A63
2 GPI2 A67
3 GPI3 A85
4 GPO0 A93
5 GPO1 B54
6 GPO2 B57
7 GPO3 B63
5.5 Fast I 2
C
The ETXexpress®-AI COM integrates two configurable I 2 C buses. The external I 2 C
clock and data signals are provided via the CPLD on COM Express™ connector
pins B33/B34 and the (LVDS) I
2 C clock and data signals from the Intel QM57
PCH are assigned to COM Express™ connector pins A83/A84. The I 2 C interface
offers full multimaster and clock stretching support.
5.6 ACPI Suspend Modes and Resume Events
The ETXexpress®-AI COM only supports the S3 state (=Save to RAM). S4 (=Save
to Disk) is not supported by the BIOS (S4_BIOS) but S4_OS is supported by the
following operating systems: