Pull down SDA pin i2c

[Hkhan7861]

Good day

I am developing on the nrf9160dk with a tag reader using i2c and am wanting to know if there is a function to pull down the SDA or SCL pins during operation in order to wake up the slave device.

Thank you in advance.

Kind regards,

Hassan

[Hkhan7861]

Hi, thank you for the reply. This is the extent of what the documentation states.  Thank you !

6.1.1 Start condition Start is identified by a falling edge of serial data (SDA) while the serial clock (SCL) is stable in the high state. A Start condition must precede any data transfer command. The device continuously monitors (except during a write cycle) the SDA and the SCL for a Start condition, and does not respond unless one is given.

www.st.com/.../st25dv04k.pdf

[Vidar Berg]

OK, this is the standard way to start a transaction with i2c. Our TWIM peripheral will also create the start condition when you start a new transfer.

Have you tried to probe the SDA and SCL line with a logic analyzer to see what the problem is?