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Donald
Level 1
Level 1
10 sign-ins 5 questions asked 5 sign-ins

Before connecting the interrupt pin of the sensor to the MCU, it is confirmed that the interrupt pulse is normally output from the sensor.
When connected to the GPIO input of MCU's P12[0] and A6 pins, an unintended pulse is generated and the interrupt cannot be read normally.
SPI_miso : P10[1] / Pin A11
SPI_mosi : P10[0] / Pin C12
SPI_sclk : P10[2] / Pin B11
SPI_ss0 : P10[3] / Pin C11
UART_1_rx : P5[0] / Pin N7
UART_1_tx : P5[1] / Pin L8
interrupt Pin_1 : P12[0] / Pin A61.jpg2.jpg3.jpg4.jpg5.jpg6.jpg7.jpg

1 Solution

Thanks for your reply.
The problem was solved by changing to a different pin.
Now we are in the process of designing a PCB and we are making additional requests.
Due to the small pitch size of CY8C6137FDI mcu
I need information about mcu's layout guidelines. (related to wlcsp-81)

The information you need is a datasheet or artwork guideline with the layout signal trace width, pin and trace clearence information, etc.

Thank you.

View solution in original post

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3 Replies
BragadeeshV
Moderator
Moderator
Moderator
First question asked 1000 replies posted 750 replies posted

Hi @Donald ,

P12.0 is connected to the level translator for SPI communication. Can you try to remove R77 and try again?

P10.6 is not connected to anything in the board and therefore should not be an issue.  What is the drive mode of the pin being driven from the sensor? Can you try to make the PSoC 6 input pin as Resistive pull up and check if the issue still occurs?

The block diagram shows the supply voltage to the sensor is 5 V but the interrupt pin is toggling at 3.3 V. Can you please check that?

Regards,
Bragadeesh
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Thanks for your reply.
The problem was solved by changing to a different pin.
Now we are in the process of designing a PCB and we are making additional requests.
Due to the small pitch size of CY8C6137FDI mcu
I need information about mcu's layout guidelines. (related to wlcsp-81)

The information you need is a datasheet or artwork guideline with the layout signal trace width, pin and trace clearence information, etc.

Thank you.

0 Likes
BragadeeshV
Moderator
Moderator
Moderator
First question asked 1000 replies posted 750 replies posted

Hi @Donald ,

We are glad that your issue is resolved. We recommend you to create a new thread for your new query so that other community members would be benefitted.

Regards,
Bragadeesh
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