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Communication Interface

I²C Communication

Application Note

• PUBLIC

AN000710

• v1-00 • 2020-Jul-21

12

│ 5

2.1.1

rma Pulses

Following pulses must be executed on SDA and SCL during the “time window” for changing the device

into Communication mode.

16 pulses (16x rising edge) on SCL

2 pulses (2x rising edge) on SDA

Figure 3 :

Unlock Command

The pulses on SDA and SCL are independent of each other!

The pulses on SDA and SCL must be applied with a maximum frequency of 1MHz.

2.2

Deactivate Communication Interface

For changing into functional mode, the pass2funct command has to be executed.

The pass2funct command writes the value of 0x53 (01010011 bin) in the register PASS2FUNCT with

address 0xf1.

Almost after the acknowledge + 65 µs, the sensor is already in functional mode.

rma procedure

time window (1ms)

SDA

SCL

Rma-pulses