HELP WITH PTN3460 I2C BUS OPERATION - ADDRESS value does not work

[david_albert]

When we set the PTN3460 chip DEV_CFG pin to GND, the I2C Slave Address should be 0x40.  We don't get any replies on this address value of 0x40.  When we change the address to 0x20, the I2C transactions start to work, why is this???  It is this way across all our boards and even another development board from another vendor.

[TomasVaverka]

Hi David,

Yes, the 7-bit slave address of the PTN3460 when DEV_CFG = low is 0x20. This address must be placed in the upper 7 bits of the byte and the Write bit (0) is in the LSB. This translates to 0x40 for a write operation.

The data sheet is a bit unclear about this and I have already asked for correction.

Best regards,

Tomas

[kasperhansen]

Hi Tomas

We are trying to communnicate with the PTN3460 over the MS I2C. 

Please specify what the I2C settings should be, this is not to be found anywhere in the datasheet.

Is there a simple command we can send to the chip to verify that it is running?