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DEMO-AD5700D2Z HART_CLK connection

Hi,

This is regarding DEMO-AD5700D2Z board. I just started programming and evaluate the performance of the ICs in-order to zero in on them. I see that HART_CLK is connected to both P2.0 and P1.0. Can someone please explain me what is the reason to connect to two pins?

Also, on a custom board, I want to connect HART_CLK to just P1.0 as I want to use P2.0 and P2.1 as I2C lines. Is it feasible?

Thanks,

Spoorthy

ad5700 ad5700-1 hart demo-ad5700d2z

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  • FormerMember
    0 FormerMember

Hi Spoorthy,

Looking at the datasheet, only P2.0 pin can be used as the UART_CLK input.

If you need both I2C and UART for your application, and want to keep the option of the UART_CLK pin available in case your application needs it, I would suggest doing the following.

  • Use P0.1 and P0.2 as the I2C bus (SDA and SCL)
  • Use P0.6 and P0.7 as the UART Tx/Rx
  • That would give you access to P2.0 for the UART_CLK pin if you need it later, and you could also synchronize using the P1.0 pin like shown on the Demo hardware.
  • If you happen to need a SPI bus there is still the option of using P1.4, P1.5. P1.6 and P1.7 pins.

Cheers,

Brandon

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  • FormerMember
    0 FormerMember

Hi Spoorthy,

Looking at the datasheet, only P2.0 pin can be used as the UART_CLK input.

If you need both I2C and UART for your application, and want to keep the option of the UART_CLK pin available in case your application needs it, I would suggest doing the following.

  • Use P0.1 and P0.2 as the I2C bus (SDA and SCL)
  • Use P0.6 and P0.7 as the UART Tx/Rx
  • That would give you access to P2.0 for the UART_CLK pin if you need it later, and you could also synchronize using the P1.0 pin like shown on the Demo hardware.
  • If you happen to need a SPI bus there is still the option of using P1.4, P1.5. P1.6 and P1.7 pins.

Cheers,

Brandon

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