Audi Q7 - Network System; Image Transfer

58
The information electronics control unit 1 J794 is connected to the
data bus diagnostic interface J533 via the infotainment CAN bus in
all infotainment versions. The infotainment CAN bus is a high-
speed bus with a max. data transfer rate of 500 kbit/s.
The following control units may also be connected to the infotain-
ment CAN depending on trim level:
• Control unit in dash panel insert J285
• Control unit for windscreen projection
(head-up display) J898
• Selector lever sensors control unit J587
The MMI display J685 and the operating unit E380 are connected
to the information electronics control unit 1 J794 via the Modular
Infotainment Platform (MIB) CAN bus. This bus is also a high-
speed bus with 500kbit/s.
If the vehicle is fitted with an additional infotainment control unit
(e.g. Bang&Olufsen sound system), the infotainment system also
comes equipped with a MOST bus. The MOST bus is a MOST 150
with a data transfer rate of 150 Mbit/s. The information electron-
ics control unit 1 J794 acts both as the system master and diag-
nostics master for the MOST bus.
Due to the combination of infotainment CAN bus and MOST bus, an
open circuit in the MOST bus will not result in total failure of the
MMI. This means that all functions executed directly in J794 are
still available. However, audio output via an external amplifier
would no longer be possible.
Network system
Infotainment topology
Image transfer
All image information which appears on the MMI displayJ685 is
sent from the information electronics control unit 1J794 via LVDS
lines.
The displays for the control unit in dash panel insert J285 are
transferred from the information electronics control unit 1J794 as
follows:
• LVDS:
Only large navigation map and detailed intersection maps.
• MOST bus:
All other content, such as liste menus or covers.
The image information from the DVD autochanger is transmitted
in the form of mpeg4 files via the MOST bus to J794. J794 then
decodes this data.
Image information from the surround view camera control unit
J928 (TopView) is transmitted to the information electronics
control unit 1 J794 via LVDS lines.
Wire colours:
Multimedia system
operating unit
E380
Driver side
volume control
E67
MMI display
J685
Infotainment CAN bus
Extended CAN
LIN bus
MOST bus
"OR" configuration
Modular Infotainment Platform (MIB) CAN
LVDS
< Back
Forwards >
Ξ Contents