CEC control
Starting with firmware version 2.05, the SMD has the option to control the power state
and input selection of a display connected to the HDMI output. The extent of the control
is Automatic Limited Functionality. CEC control can be enabled or disabled via SIS
command (see
on page 133). CEC control is disabled by default. CEC
communication with any source connected to the HDMI input of the SMD is not supported.
External control of CEC communication is not supported. Automatic Limited Functionality is
defined as follows:
•
When the SMD product powers on or transitions from standby mode to normal
operation, the SMD sends Power on and Show Me commands to the display
connected to its HDMI output.
•
When the SMD product transitions from HDMI sync mute to HDMI sync active state, the
SMD sends Power On and Show Me commands to the display connected to its HDMI
output.
•
When the SMD product transitions from HDMI sync active to HDMI sync mute state, the
SMD sends the Power Off (standby) command to the display on its HDMI output.
•
When the SMD product transitions from normal operation to standby mode, the SMD
sends the CEC Power Off (standby) command to the display on its HDMI output.
NOTES:
•
In accordance with the CEC standard (HDMI 1.3 supplement 1) the display adopts
logical address
0
(TV) and the SMD adopts logical address
14
(free use). Translation
to CEC standard command terminology:
•
Power On
— Image View On to logical address
0
(TV).
•
Power Off
— Standby to logical address
0
(TV).
•
Show Me
— Active Source broadcast indicating the physical address from the
display EDID. The Show Me command is broadcast to allow any other devices
to take appropriate action.
•
There are variations in the way CEC is implemented between different
manufacturers. Extron strives to accommodate these variations and to ensure
reliable operation, but not all display makes and models are tested. Please report
any inconsistencies.
•
Many displays do not support CEC control. Most displays that do support CEC
include settings to
enable
,
disable
, and
configure
CEC control and must be
configured correctly to ensure reliable operation. The term used for CEC control
varies between manufacturers.
SMD 101 • Introduction
4
Summary of Contents for SMD 101
Page 2: ......
