www.nicerf.cn

STP201

NiceRF Wireless Technology Co., Ltd.

Rev 2.0

sales@nicerf.com

- 4 -

5. Typical application circuit:

6. Working mode:

1) Normal work

When detected step action, module will enter normal working mode, users can read the step value by

I2C interface. The I2C communication protocol is as below:

DATA0：step lower byte

DATA1：step high byte

DATA2：= DATA0 + DATA1

DATA3：= DATA2

When the steps overflow（0xFFFF）, it count from 0.

The steps will be cleared when DATA3 is read.

Note: All the bytes are hexadecimal

2) Sleeping mode

The chipset will enter normal working mode when step action is detected, and enter sleeping mode if

no step action is detected for 20s. In sleep mode the G sensor doesn’t work, the MCU will enter deep

sleeping mode and the whole is in low power consumption.