Hardware Reference
In-Depth Information
HDMI Group
The
hdmi_group
option defines the HDMI type.
hdmi_group
Description
0
Use the preferred group reported by the EDID (default)
1
CEA
2
DMT
HDMI Mode
This option defines the screen resolution to use in CEA or DMT format (see the
parameter
hdmi_group
in the preceding subsection “HDMI Group”). In Table
2-2
, the
modifiers shown have the following meanings:
H
means 16:9 variant of a normally 4:3 mode.
2x
means pixel doubled (higher clock rate).
4x
means pixel quadrupled (higher clock rate).
R
means reduced blanking (fewer bytes are used for blanking
within the data stream, resulting in lower clock rates).
Table 2-2.
HDMI Mode Settings
Group
Mode
CEA
Resolution
DMT
Resolution
Refresh
Modifiers
Refresh
Notes
1
VGA
640×350
85 Hz
2
480 p
60 Hz
640×400
85 Hz
3
480 p
60 Hz
H
720×400
85 Hz
4
720 p
60 Hz
640×480
60 Hz
5
1080 i
60 Hz
640×480
72 Hz
6
480 i
60 Hz
640×480
75 Hz
7
480 i
60 Hz
H
640×480
85 Hz
8
240 p
60 Hz
800×600
56 Hz
9
240 p
60 Hz
H
800×600
60 Hz
10
480 i
60 Hz
4x
800×600
72 Hz
(
continued
)
