DDR Bandwith

ranchu

Guru 20755 points

Hello,

using DM8168 , H.264, MPEG-4 codecs, In datasheet i did not find mentioning of ddr bandwith (Mega Byte/sec) . Is there any document about DDR performance in relation to codec ?

Thank you,

Ran

over 13 years ago

0 Yashwant Dutt over 13 years ago

TI__Genius 17215 points

Ran,

We dont have DDR b./w given as part of datasheet. We will try to send the information through Yair.

regards

Yashwant

0 Renjith Thomas over 13 years ago in reply to Yashwant Dutt

Guru 31670 points

In the TRM its given that DMM operates at 400MHz max with 128-bit wide bus. So the maximum possible throughput will be 6.4GB/sec if L3 is clocked accordingly and DDR is giving its maximum throughput.

0 ranchu over 13 years ago in reply to Renjith Thomas

Guru 20755 points

Hello,

Is there a tool for testing the actual bandwidth ? Is code generation tool which is mentioned in datasheet should be used for that ?

Thank you,

Ran

0 Badri Narayanan over 13 years ago in reply to ranchu

TI__Guru 59700 points

On 816x/814x you can measure actual bandwidth using XDS560v2 emulator with CCS v5.x.

http://ap-fpdsp-swapps.dal.design.ti.com/index.php/Debug_and_Trace_Tools_for_OMAP4/Netra/Centaurus/Shannon/Nyquist#Statistics_Collector_.28also_known_as_Performace_Probe.29

has the details. If link is not externally accessible pls contact your FAE to get a offline copy.

No instrumentation is required in the application. The bandwidth is measured by reading counters in the SoC and provides realtime actual ddr b/w data

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DDR Bandwith