2 lpc, Come-bpc2 / features and interfaces – Kontron COMe-bPC2 User Manual
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COMe-bPC2 / Features and Interfaces
4.2
LPC
The Low Pin Count (LPC) Interface signals are connected to the LPC Bus bridge located in the CPU or chipset. The LPC low
speed interface can be used for peripheral circuits such as an external Super I/O Controller, which typically combines
legacy-device support into a single IC. The implementation of this subsystem complies with the COM Express®
Specification. Implementation information is provided in the COM Express® Design Guide maintained by PICMG. Please
refer to the official PICMG documentation for additional information.
The LPC bus does not support DMA (Direct Memory Access) and a clock buffer is required when more than one device is
used on LPC. This leads to limitations for ISA bus and SIO (standard I/O´s like Floppy or LPT interfaces) implementations.
All Kontron COM Express® Computer-on-Modules imply BIOS support for following external baseboard LPC Super I/O
controller features for the
Winbond/Nuvoton 5V 83627HF/G and 3.3V 83627DHG-P:
83627HF/G
Phoenix BIOS
AMI CORE8
AMI Aptio
PS/2
YES
YES
YES
COM1/COM2
YES
YES
YES
LPT
YES
YES
YES
HWM
YES
YES
NO
Floppy
NO
NO
NO
GPIO
NO
NO
NO
83627DHG-P
Phoenix BIOS
AMI CORE8
AMI Aptio
PS/2
YES
YES
YES
COM1/COM2
YES
YES
YES
LPT
YES
YES
YES
HWM
NO
NO
NO
Floppy
NO
NO
NO
GPIO
NO
NO
NO
Features marked as not supported do not exclude OS support (e.g. HWM can be accessed via SMB). For any other LPC
Super I/O additional BIOS implementations are necessary. Please contact your local sales or support for further details.
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