Espi; I2C; Gpio - Kontron COMh-caRP User Manual

BSEL
eSPI_CS1# eSPI_CS0# SPI_CS1# SPI_CS0# Boot option Description
0 1 2
1 1 0 Carrier Module
1 0 1 Carrier Module
1 0 0 - -
0 1 1 Module Carrier
0 1 0 Module Carrier
0 0 1 Module Carrier
0 0 0 - -
Table 25: BIOS Boot options on COMh-caAP
eSPI + SAFS configurations are not yet supported on COMh-caAP.
Following Flash Devices are supported by the BIOS:
W25Q256JVEIQ
S25FL256LAGNFI010
MX25L25645GZ2I
MT25QL256ABA1EW9-0SIT

3.4.10 eSPI

COM-HPC supports an eSPI port for general purpose I/O. The eSPI interface (like LPC before it) can be
useful for general purpose devices such as Carrier Super I/O devices, Carrier CPLDs or FPGAs,
hardware monitoring devices, and others. It is also possible to boot the BIOS over eSPI. The eSPI bus
runs from a 1.8V supply. COM-HPC does not support LPC.
Booting from eSPI is not yet supported on COMh-caAP. Using eSPI devices on the carrier will require a
customized BIOS version.

3.4.11 I2C

The internal I2C bus transfers data between components on the same module and the external I2C
bus transfers data between I2C devices connected on the bus. The Fast I2C bus transfers data with
rates up to 400 kHz. To change the I2C bus speed, in the BIOS setup menu select:
Advanced>Miscellaneous>I2C Speed> 400 kHz to 1 kHz
The default speed is 200 kHz.

3.4.12 GPIO

The COMh-caAP offers GPIO pins on the dedicated pins of COM-HPC®. The type of termination resistor
used sets the direction of the GPIO; where GPI terminations are pull-up resistors, and GPO
terminations are pull-down resistors.
www.kontron.com
Module Carrier MAFS
Carrier Module MAFS
- - -
Module Module MAFS
Module Module SAFS
Module Module SAFS
- - -
BIOS on SPI0 on Carrier or on SPI1 on Module
BIOS on SPI0 on Module or on SPI1 on Carrier
Not used
BIOS on SPI0 or SPI1 on Module
BIOS on Carrier SAFS
BIOS on Carrier SAFS
Not used
COMh-caAP User Guide
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