Flexbus Clockout

[VGS]

Hi

Iam using  TWR-K70 board for interfacing LCD with SSD 1963 controller using  Flex bus.

I am trying to measure Flex-bus clock (PTC3 - ALT 5 ) from the TWR module.But it is always showing  20 MHz

even when i change the flex bus frequency using SIM-CLKDIV1 Register.

I tried variying the clock from 40 MHz to 10 MHz but i am getting the same output (20 MHz).

Can any one help me with how to measure the Flex bus Clock

[Kan_Li]

Hi ,

Would you please share your project or code for a review? I will try to reproduce it based on my TWR-K70.

Thanks for your patience!

Have a great day,
Kan

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[VGS]

hi Kan

Thanks .

What is the maximum speed for flex bus in k70-120MHz .

i am attaching flexbus configuration file

Please review it.

If required i can also send my project file.

i am testing with D4D  sample code for  TWR LCD (320*240).

[Kan_Li · Accepted solution]

Hi ,

I have implemented a PE demo based on TWR-K70, I just enabled the port c clock gate and set PTC3 as clockout, and changed the flexbus clkout as below:

60MHz

40Mhz

seems no problem to output clock other than 20MHz, maybe it is a software issue, so I attached my project for your reference, please kindly refer to it for more details.

Hope that helps,

Have a great day,
Kan

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