connecting LP55223 EVM with cc2650

Hi,

It is possible to connect CC2650 and LP5523 though I2C.

However, if you use LP5523 EVM, you need to disconnect the microcontroller on the EVM board. There are no jumpers on the EVM for that purpose so you need to check the schematics and disconnect at least SDA, SCL and EN, optionally also TRIG, CLK, INT, ADDR0 and ADDR1.

The IO levels of the LP5523 are set by voltage at the EN pin, so if you provide EN signal from CC2650 that'll set the IO voltage levels properly. There is also VDDIO EXT input (X3 & J1) at the EVM, which is connected to the pull-up resistor of TRIG signal.

As default the LP5523 uses external 32kHz clock signal. You can use also internal clock by enabling it from I2C register 36h.

I2C ID (7bit) is 32h if ADD0 and ADDR1 are connected to GND.

BR,
Jussi

hiii

i didnt find any jumpers to disconnect msp430 controller with i2c channel in order to use cc2650

can you help me how to disconnect the hardware which is having msp430 controller

i dont have schematic for LP5523 ,,,can you suggest some steps to remove i2c of msp430 in the evm

thanks in advance......!!!!!!!!!!!!!!! waiting for replay

Hi,

You can find the EVM schematics from LP5523EVM appnote page 24, here's a link to the document:
www.ti.com/.../snva664e.pdf

BR,
Jussi