Texas Instruments | Migrating from TMS320DM6467 to TMS320DM6467T (Rev. B) | Application notes | Texas Instruments Migrating from TMS320DM6467 to TMS320DM6467T (Rev. B) Application notes

Texas Instruments Migrating from TMS320DM6467 to TMS320DM6467T (Rev. B) Application notes
Application Report
SPRAB44B – June 2010
TMS320DM6467 to TMS320DM6467T Migration Guide
DSPS Applications............................................................................................................................
ABSTRACT
This application report describes an overview of the necessary changes to migrate a DM6467-based
design from a DM6467 device (594 MHz or 729 MHz) to a DM6467T (1GHz) device. The DM6467T
device requires the changes listed in this document for proper operation. Other system changes may be
required to accommodate new speeds or capabilities in the system.
More information on these two devices is available from their respective TI product folders located at:
• TMS320DM6467: http://focus.ti.com/docs/prod/folders/print/tms320dm6467.html
• TMS320DM6467T: http://focus.ti.com/docs/prod/folders/print/tms320dm6467t.html
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Contents
Pin Map and Memory Map .................................................................................................
Feature Differences .........................................................................................................
Board Hardware Changes .................................................................................................
Software/Firmware Changes ..............................................................................................
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1
2
3
List of Tables
1
1
DM6467 and DM6467T Feature Differences ............................................................................ 1
2
Minimum Required Changes .............................................................................................. 2
3
Probable Changes .......................................................................................................... 2
4
Other Potentially Required Changes ..................................................................................... 3
5
Software Minimum Required Changes ................................................................................... 3
Pin Map and Memory Map
The pin and memory maps are the same for both the DM6467 and DM6467T devices.
2
Feature Differences
Table 1 shows the feature differences between the DM6467 and DM6467T devices.
Table 1. DM6467 and DM6467T Feature Differences
DSP/ARM Speed
DM6467 (594MHz)
DM6467T
594 MHz/297 MHz
1 GHz/500 MHz
DDR2 Speed
297 MHz
400 MHz
VPIF
99 MHz
150 MHz
PCI
33 MHz
66 MHz
All trademarks are the property of their respective owners.
SPRAB44B – June 2010
TMS320DM6467 to TMS320DM6467T Migration Guide
Copyright © 2010, Texas Instruments Incorporated
1
Board Hardware Changes
3
www.ti.com
Board Hardware Changes
This section describes the hardware changes needed to migrate from DM6467 to DM6467T.
3.1
Minimum Required Changes
Table 2 summarizes the minimum required changes for DM6467T 1GHz operation. These changes are
required in all systems, unless the current DM6467 design already meets or exceeds the new
requirement.
Table 2. Minimum Required Changes
Component
Change To
CVDD Core Power Supply
Core power supply is changed from 1.2 V to 1.3
V for DM6467T device.
Comments
DDR2
DDR2-800
DEV_MXI Input Clock
33 MHz or 33.3 MHz oscillator or
fundamental-mode crystal, e.g.,
CS10-33.000MABJ-UT or equivalent
DM6467T 1GHz operation has higher CVDD power
demands than 594 MHz parts. Systems where the
power supply was barely adequate to supply
Furthermore, the power will nearly double (3-4W
DM6467 (594-/729-MHz) parts will require larger
applications now in the 6-7W range), so the
power supplies for DM6467T (1 GHz).
power supply design needs to account for the
additional current.
To achieve 1 GHz speed, input frequency above
31.25 MHz is required. (Note: Max PLL multiplier
(PLLM) value is 32). The DM6467 can accept a
clock up to ~55 MHz from external oscillators, but
only up to 35 MHz from external crystals.
Recommendation is to use the same crystal speed
as used on the DM6467T EVM, which is 33 MHz.
For more information regarding the DM6467T
EVM, see
http://support.spectrumdigital.com/boards/evmdm6
467t.
Other crystal speeds between 31.25 MHz and 35
MHz can be used with software changes to set
appropriate PLL multiplier.
The 27 MHz crystal can be used with the DM6467T
to maintain backward compatibility with DM6467.
However, with 27 MHz input clock, maximum
device operating speed and DDR2 operating speed
can not be achieved due to PLL multiplier limitation
(maximum PLLM value is 32). The maximum
frequency that can achieved with 27 MHz input
crystal is: 27 MHz * 32 = 864 MHz.
3.2
Probable Changes
Table 3 summarizes other changes that are likely to be required by systems of a typical design. These
changes will not necessarily be required in all systems. Therefore, each of these probable changes should
be evaluated to determine if they are necessary for any given design.
Table 3. Probable Changes
Component
Change To
Comments
Video Port Clock
External clock source:
At 1GHz, the DM6467T can not produce standard
27, 74.25, or 148.5 MHz frequencies. In systems
where the VPBE or other parts are relying on
internal clock sources to generate these
frequencies, a change to external clocks will be
required.
27 MHz for SD video
74.25 MHz for HD video
The external clock source can be an existing clock
source in the design of the correct frequency, a
fixed-frequency Oscillator or Crystal Clock
Generator, or an external programmable PLL such
as the CDCE949.
2
TMS320DM6467 to TMS320DM6467T Migration Guide
Copyright © 2010, Texas Instruments Incorporated
SPRAB44B – June 2010
Software/Firmware Changes
www.ti.com
Table 3. Probable Changes (continued)
Component
Change To
Comments
PCI-66
Pull up M66EN pin (see the DM6467T EVM
schematic located at:
http://support.spectrumdigital.com/boards/evmdm
6467t)
In systems where 66 MHz PCI operation is
desired, these changes must be made. In systems
not using PCI or remaining at 33 MHz PCI, these
changes are not necessary.
Ensure other PCI components on the bus are 66
MHz capable
Change to 66 MHz clock source for PCI
3.3
Other Potentially Required Changes
Table 4 summarizes other changes that may be required in some systems. These changes will not
necessarily be required in all systems. Therefore, each of these changes should be evaluated to
determine if they are necessary for any given design.
Table 4. Other Potentially Required Changes
4
Component
Change To
Comments
Heat Sink
Larger capacity heat sink
Systems where the heat sink was barely adequate
to cool DM6467 (594-/729-MHz) device requires
larger heat sinks for the DM6467T (1 GHz) device.
Note that a head sink is installed on the DM6467T
EVMs (Revision C or later).
Software/Firmware Changes
This section describes software/firmware changes needed to migrate from TMSDM6467 to TMSDM6467T.
4.1
Software Minimum Required Changes
Table 5 summarizes the minimum required changes in software/firmware for DM6467T 1 GHz operation.
These changes are required in all systems, unless the current DM6467 design already meets or exceeds
the new requirement.
Table 5. Software Minimum Required Changes
4.2
Component
Change To
Comments
UBL
Correct PLL settings for DEV_MXI input clock
TI will supply a new UBL with the correct
programming for 990 MHz DSP and 396 MHz
DDR with 33 MHz input clock. Users of other
frequencies need to change the PLL multiply,
divide, and DDR timing parameters as
appropriate.
Kernel VPIF Clock Muxing
External clock source
To use the external video port clocks provided by
the hardware, the clock muxing must be set to use
the external clocks. TI provides a kernel that
includes this change.
Migration from LSP 2.00 (DM6467) to PSP 3.02 (DM6467T)
The migration details from LSP 2.00 (DM6467) to PSP 3.02 (DM6467T) are available on the wiki at:
http://wiki.davincidsp.com/index.php/DaVinci_PSP_3.02_Linux_Installation_User_Guide#Migration_to_Da
Vinci_PSP_3.02
4.3
Software Codec Migration From DM6467 to DM6467T
There are no known considerations for the software codecs when migrating from DM6467 to DM6467T.
SPRAB44B – June 2010
TMS320DM6467 to TMS320DM6467T Migration Guide
Copyright © 2010, Texas Instruments Incorporated
3
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