10 miscellaneous circuits, Miscellaneous circuits, 10 miscellaneous circuits speaker – Kontron COMe-cXLi2 User Manual
Page 48: Battery, C bus, Smbus
Kontron COMe-cXLi2 User’s Guide
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42
S5 -> S0
PWRBTN Event
open / high
x
reconnecting
VCC
NOTES: 1) Columns marked “x” are not relevant for the specified power
state.
2) All ground pins have to be tied to the ground plane of the carrier
board.
4.2.10
Miscellaneous Circuits
Speaker
The implementation of this subsystem complies with the COM Express®
Specification. For additional implementation information, refer to the PICMG
COM Express® Design Guide.
Battery
The implementation of this subsystem complies with the COM Express®
specification. For additional implementation information, refer to the PICMG
COM Express® Design Guide on the PICMG website.
In compliance with the EN60950 standard, there are at least two current-
limiting devices (resistor and diode) between the battery and the consuming
component.
I
2
C Bus
The CPLD implementation connects LPC to the I
2
C controller to allow higher
speed I
2
C transactions than in previous I/O implementations.
For additional information, refer to the PICMG COM Express® Design Guide on
the PICMG website and I
2
C application notes and JIDA specifications, which
are available on the Kontron website at
See the Chapter 8, “BIOS Operation” for supported I
2
C features.
SMBus
System Management Bus (SMB) signals are connected to the SMBus controller,
which is located on the US15WPT system controller hub. The SMBus is a 2-wire
bi-directional bus (clock and serial data) used for system management tasks