Super frequency of bf531

 

After a piece of work, I decided to play with the super-frequency. I took a layer-2 bf531 board and tried to overtake it. from 400 to 600 m, the chip was running stably, I hit it with an infrared, and kept the temperature below 36 degrees. Well, I think of the famous saying of our hardware buddy who used the Beidou system. The high level of layout is to deploy the Six-layer layout on two layers and ensure stability!

**************************************** ****************************
Not far away, seg is still in the dark, but the new day has started. It's easy to get busy all night long. I decided to play with the super-frequency bf531. After playing for me for one night, I had to make it faster, or I had to be unbalanced.
At the beginning, I was not very brave. When I got to 425, I was afraid that I could not run. As a result, everything was okay. Then I went on and set it to MB. I didn't respond. I am unwilling to think about it again. My God, poor SD, even ran on M. Of course, it was too much to eat. Dropped sclk, haha, and I got it. My bf531 ran on M. This is the end of the day. After the job is finished, you can get started with zzzzzzzzzzzzzzzz... zzzzzzzzzzzzz... zzzzzzzzzzzzzzzzzzz.

CPU: adsp BF533 rev.: 0.4
Board: NC bf53x Board
Support: http://blackfin.uclinux.org/
Clock: VCO: 500 MHz, core: 500 MHz, system: 125 MHz

-------------------------------------------------------

Hey hey, it's still quite fun for me 533, 594 mcclk, 118.8msclk...

-------------------------------------------------------

Well, use 533 to 531. No such comparison method is available!

What is the fundamental frequency of 533? What about 531? Haha .....

-------------------------------------------------------

M is basically normal. Haha

-------------------------------------------------------

533 can also exceed

To make full use of the SDRAM bandwidth, it is best to run sclk to 133 m, so:
133x4 = 532 <600, or
133x5 = 665> 600

You can try it.

But 533 is out of the 532m version.

-------------------------------------------------------

My 531 Development Board is better

The clock speed is 530 MHz, and the external frequency is 132 MHz. It has been running for 45 consecutive days, with 100% load.

Root: ~> Uptime
07:54:40 up 45 days, load average: 1.00, 1.00, 1.00
Root: ~> CAT/proc/cpuinfo
CPU: ADSP-BF531 Rev. 0. 0.5
MMU: None
FPU: None
Core clock: 530841600Hz
System clock: 132710400Hz
Bogomips: 1056.76
Calibration: 528384000 Loops
Board name: CAMKING-BF531KIT
Board Memory: 32 MB
Kernel memory: 32 MB
I-CACHE: On
D-CACHE: On (write-through)

-------------------------------------------------------

I have been using 531 for 533.

Try again if you don't believe it. In the past, I ran the 600 mcclk and 150msclk dual-board. However, some films cannot exceed the nominal frequency. I have also encountered this problem. Most films can run at 594 MB.