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LMK5B12204: Programming

Part Number: LMK5B12204

Hi there,

In the datasheet of LMK5B12204, it says 

Include dedicated header to access the I2C or SPI interface of the device, as well as a header pin for ground.
– This can enabled off-board programming for device

So my question is,

Can I use  LMK05318BEVM board to program the LMK5B12204 on my board after power up the device?

If so, my understanding is, having the I2c pins SCL/SDA and ground pin route to a connector, it should not include pull-ups on the boards.

Connect LMK05318EVM board J4A's pin A01 (SCL), A02 (SDA) and A03 (GND) to above three pins, this will include a pull-up with U2A_3V3. See the attached picture.

Power up both boards, LMK05318EVM should recognize LMK5B12204, and then program LMK5B12204 by using LMK05318EVM's microcontroller. 

Is my understanding correct?

  • Hi Minghui,

    It is possible to rework an EVM by connecting its I2C lines to an external board/device, which would allow you to talk to the external device over the EVM's USB connection. I have seen this done before on another product. I think your plan in the schematics would work, but I will check with my team to be sure I am not overlooking any details.


    Evan Su

  • Hi Evan,

    Sounds great, please have them review the schematic to ensure it works and I didn't miss anything. Much appreciated!