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Posted: **Fri Nov 07, 2025 2:04 am**

barnacle wrote:

Does the PIC have an option to change the drive speed (rise/fall times) of the output like STM parts do?

Not that I could find.

-Niek.

Posted: **Fri Nov 07, 2025 6:13 am**

barnacle wrote:

Does the PIC have an option to change the drive speed (rise/fall times) of the output like STM parts do?

Quickly looking at the datasheet, I think the SLRCON* "Slew Rate Control" registers might do that. They default to 1, which means slow. And reading further (in the I/O and CLKOUT Timing Specifications), that'll get about 20ns back.

Posted: **Fri Nov 07, 2025 6:39 pm**

John West wrote:

Quickly looking at the datasheet, I think the SLRCON* "Slew Rate Control" registers might do that. They default to 1, which means slow. And reading further (in the I/O and CLKOUT Timing Specifications), that'll get about 20ns back.

Ah - I missed that. I will give that a go over the weekend. Thanks!

-Niek.

Posted: **Sun Nov 09, 2025 4:39 pm**

Niek6502 wrote:

John West wrote:

Quickly looking at the datasheet, I think the SLRCON* "Slew Rate Control" registers might do that. They default to 1, which means slow. And reading further (in the I/O and CLKOUT Timing Specifications), that'll get about 20ns back.

Ah - I missed that. I will give that a go over the weekend.

Did another test:

First input of the scope (yellow line) shows an output of a CLC with maximum slew rate, the second input (blue line) shows a CLC output with the default slow slew rate. Quite a difference. For my rig at 1MHz this will be more than adequate. Thanks John!

-Niek.

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