MCXA153 GPIO rise/fall time performance

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

MCXA153 GPIO rise/fall time performance

301 Views
seanwu
Contributor IV

Dear sir,

In MCXA153 datasheet, the Port rise/fall time for medium I/O pins is like below.

But I measure the Pin GPIO3_6 real rise time, the time value is 45.2ns.  It is more slower then spec.

Could you please give me some suggestion?

Thanks.

BR,

Sean Wu.

/////////////////////////////////////////////////////////////////////////////

clock is BOARD_BootClockFRO96M();

In while loop to toggle GPIO3_6.

while (1)

{

delay();

GPIO3->PTOR=GPIO_FIT_REG(64);

}

 

 

seanwu_0-1730872422529.png

seanwu_1-1730872569472.jpeg

 

Labels (1)
Tags (1)
0 Kudos
Reply
1 Reply

262 Views
xiangjun_rong
NXP TechSupport
NXP TechSupport

Hi,

Pls refer to the test  condition under which the GPIO pin(The GPIO pin  is configured in output mode ) toggles  and is tested the rising/falling time.

The pin parasitic capacitance is required to be 25pF when the GPIO output pin toggles, so I suggest you select a GPIO pin, the GPIO pad(LQFP package) is not connected out, then test it with scope.

xiangjun_rong_1-1730943415401.png

 

Hope it can help you

BR

Xiangjun Rong

 

 

0 Kudos
Reply