What does "ERROR: 2 OUTPUT Pins on net SPI-SDI" mean ?

Firat Kocak schrieb:

Hi,

 

When i run erc command i get this error. I checked the SPI-SDI net but

could not see anything wrong. So, What does this error mean ? Is it a

critical one ?

 

Best regards,

 

Firat

It normally is critical because it means that two outputs are connected

together. This can mean i.e. that one output provides a high supply

voltge and the other one the ground. Result will be a nice smell of Amps.

Only open collector outputs may be connected together and perhaps

tristate outputs with appropriate control.

Maybe just the direction of a pin is wrong in a library.

--

Gruß / regards

Jörn

Joern Paschedag wrote:

Firat Kocak schrieb:

Hi,

 

When i run erc command i get this error. I checked the SPI-SDI net but

could not see anything wrong. So, What does this error mean ? Is it a

critical one ?

 

Best regards,

 

Firat

 

It normally is critical because it means that two outputs are connected

together. This can mean i.e. that one output provides a high supply

voltge and the other one the ground. Result will be a nice smell of Amps.

Only open collector outputs may be connected together and perhaps

tristate outputs with appropriate control.

Maybe just the direction of a pin is wrong in a library.

 

Hi,

Thanks for the reply. I will check it again. But the SPI-SDI net is

connected to the SDO pins of the SPI devices and SDI pin of the mcu. I

would rather delete SPI-SDI and create it again.

Regards,

Firat

Firat Kocak wrote:

Joern Paschedag wrote:

Firat Kocak schrieb:

Hi,

 

When i run erc command i get this error. I checked the SPI-SDI net

but could not see anything wrong. So, What does this error mean ?

Is it a critical one ?

 

Best regards,

 

Firat

 

It normally is critical because it means that two outputs are

connected together. This can mean i.e. that one output provides a

high supply voltge and the other one the ground. Result will be a

nice smell of Amps. Only open collector outputs may be connected

together and perhaps tristate outputs with appropriate control.

Maybe just the direction of a pin is wrong in a library.

 

 

Hi,

 

Thanks for the reply. I will check it again. But the SPI-SDI net is

connected to the SDO pins of the SPI devices and SDI pin of the mcu. I

would rather delete SPI-SDI and create it again.

As Joern suggested, check the direction of the pins in the library where

each part comes from.  Maybe the SDI pin of the MCU is not defined as an

input.

--

Bert Menkveld

Bert Menkveld wrote:

Firat Kocak wrote:

Joern Paschedag wrote:

Firat Kocak schrieb:

Hi,

 

When i run erc command i get this error. I checked the SPI-SDI net

but could not see anything wrong. So, What does this error mean ?

Is it a critical one ?

 

Best regards,

 

Firat

It normally is critical because it means that two outputs are

connected together. This can mean i.e. that one output provides a

high supply voltge and the other one the ground. Result will be a

nice smell of Amps. Only open collector outputs may be connected

together and perhaps tristate outputs with appropriate control.

Maybe just the direction of a pin is wrong in a library.

 

Hi,

 

Thanks for the reply. I will check it again. But the SPI-SDI net is

connected to the SDO pins of the SPI devices and SDI pin of the mcu. I

would rather delete SPI-SDI and create it again.

 

As Joern suggested, check the direction of the pins in the library where

each part comes from.  Maybe the SDI pin of the MCU is not defined as an

input.

 

--

Bert Menkveld

 

 

Hi,

Thanks you to all. As you suggested, the SDO pin of one of the spi

devices is defined as output. So, there is nothing to correct for this

issue.

Thanks again,

Regards,

Firat