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Hardware Description
ARM DUI 0447J
Copyright © 2009-2014, ARM. All rights reserved.
2-15
ID052914
Non-Confidential
2.5.4
DVI multiplexer
The motherboard has a
Digital Visual Interface
(DVI) connector. A multiplexer on the
motherboard selects the source for the video output as either the:
•
MMB bus from the CoreTile Express daughterboard in Site 1.
•
MMB bus from the LogicTile Express daughterboard in Site 2.
•
CLCD controller in the motherboard IO FPGA.
The source for the DVI is determined by the generic motherboard configuration file. See the
ARM
®
Versatile
™
Express Configuration Technical Reference Manual
.
You can also change the source for the DVI in run mode by using the SYS-CFGCTRL register.
See
Configuration Control Register
on page 4-22
.
The motherboard Multiplexer FPGA connects one of the three MultiMediaBus video and audio
interfaces from the motherboard and two daughterboards respectively to the DVI connector on
the back panel. This means you can select either of the daughterboards or the IO FPGA to drive
the DVI connector.
Figure 2-6
shows how the Multiplexer FPGA interfaces with the daughterboards, IO FPGA, and
the
Motherboard Configuration Controller
(MCC).
The DVI controller is an Sil9022 and supports up to 1080p resolution. The actual resolution
available depends on the CLCD controller in the daughterboard, or motherboard if you are using
the CLCD controller in the motherboard.
Figure 2-6 MMB multiplexer block diagram
2.5.5
PCI-Express
The motherboard supports four
PCI-Express
slots, of connector widths x4, x4, x8, and x16, each
of lane width four.
Multiplexer FPGA
3:1 Multiplexer
MMB from
CoreTile Express
daughterboard
in Site 1
DAC
DVI-I connector
Digital video
MMB from
LogicTile Express
daughterboard
in Site 2
MMB from
motherboard
I/O FPGA
MMB selection signals
from Motherboard
Configuration Controller
HDMI
Digital audio