STP201M is a 3D pedometer module with functional IC chipset which include a G-sensor andMCU. It has adopted the standard IIC interface, with the 3D MEMS sensor (G sensor) and highprecision of 3D pedometer algorithm, it can give a precisely pedometer in any direction. This chipsethas the characteristics of small size, low power consumption and etc. The standard I2C digitalinterface ensures it can be easily embedded in various kinds of pedometer functional system
★Note:The algorithm of our pedometer is adjustable according to customer’srequirement. We can provide the pedometer for shoes, table class pedometer and bracelet pedometerwearing on wrist, pedometer wearing on waist and pedometer putting inside the pocket.Pls indicate clearly when purchasing.
High precision 3D pedometer algorithm
Low s leep cur rent
IC inter face
Heal thcare products
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:
DATAO: step lower byte DATA1: step high byte
DATA2：= DATA0 + DATA1 DATA3：= DATA2
When the steps overflow, 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 module is in low power consumption.
★Note: This module can be wakeup by I2C interface. There are some limitations when the module is wakeup by I2C interface.For the first “start” command of the I2C protocol, the SCL will have to hold at least 500us to wake up MCU. The maximum I2C clock is 100 KHz.
Also: STEP_OUT: The chipset can output the pulse for each step atciton, the high level of the pulse signal is around 50 ms.