Appendix A - Compatibility - DFI FS053 User Manual

Appendix A - Compatibility

► Introduction
The hardware update from revision A (Rev. A) to B (Rev. B) results in some changes of set-
tings, and is followed by software updates required by downward compatibility. Changes are
detailed, listed, and compared in this Chapter.
► Examine Procured Revision
The revision of the system is printed on the bottom side of the board. The location is illus-
trated in the diagram below. Currently there have been two versions already officially released,
which are Rev. A and Rev. B.
Bottom View (Rear I/O on the Right)
ON
1 2 3 4 5 6 7 8
► Boot Device Select
Default settings of the Boot Device Select are different between CPU versions and board ver-
sions. Boot Device can be configured via the 8-pin switch (i.e. SW5) as instructed in Chapter
2. For initial setup, it is strongly suggested that the system is booted from the default boot
device as listed below.
Board Revision CPU version
Quad
Rev. A
DualLite
Quad
Rev. B
DualLite
Appendix A - Compatibility
Appendix A
ON
1 2 3 4 5 6 7 8
Default Boot Device
eMMC
eMMC
SPI
eMMC
► Panel Backward Compatibility
Along with the Rev. B update, the software parameters were also modified and optimized
specifically for Rev. B design and for a verified panel — AM-800480R3TMQW-T31H. For the
previous Rev. A version, the software parameters were optimized specifically for Rev. A design
and for a verified panel — OT070UADDBT-00. The Rev. B software parameters, in addition, can
be manually re-configured to support the panel — OT070UADDBT-00 — for panel backward
compatibility. Please follow the multi-panel switching instructions below to switch between the
configurations preset for the two said panels on a Rev. B system. The default parameters of
Rev. B are for the panel — AM-800480R3TMQW-T31H.
Board Revision
Rev. A
AM-800480R3TMQW-T31H, OT070UADDBT-00
Rev. B
► Multi-panel Switching Guide
To switch between the two verified panel models on Rev. B systems, two methods are pro-
vided and instructed below:
Method 1: U-Boot command via UART console
1. Connect the board to a UART serial console via the debug UART port.
2. Power on the system, and press ENTER when the line "Hit any key to stop autoboot:"
appears as shown below.
30
Verified Panel Model
OT070UADDBT-00
(software switched)
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