KX224-1053-SR datasheet, PDF - EEWORLD Datasheet

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KX224-1053-SR: DescriptionMEMS DEVICE; CategoryThe sensor; File Size445KB，20 Pages; ManufacturerKionix; Environmental Compliance

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KX224-1053-SR Overview

MEMS DEVICE

KX224-1053-SR Parametric

Parameter Name	Attribute value
type	number
axis	X，Y，Z
Acceleration range	±8g，16g，32g
Sensitivity (LSB/g)	4096（±2g）~ 1024（±8g）
Sensitivity (mV/g)	-
bandwidth	800Hz
Output type	I²C，SPI
Voltage - Power	1.71 V ~ 3.6 V
characteristic	Optional value range
Operating temperature	-40°C ~ 85°C（TA）
Installation type	surface mount
Package/casing	16-LGA
Supplier device packaging	16-LGA（3x3）

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AN090

Getting Started

1. Introduction

This application note will help developers quickly implement proof-of-concept designs using the

KX222,

and

KX224

tri-axis accelerometers. Please refer to the corresponding Product Specifications

document for additional implementation guidelines. Kionix strives to ensure that our accelerometers

will meet design expectations by default, but it is not possible to provide default setting to work in

every environment. Depending on the intended application, it is very likely that some customization

will be required to optimize performance. The information provided here will help the developer get

the most out of these tri-axis accelerometers.

2. Circuit Schematic

This section shows recommended wiring for this family of accelerometers, based on proven

operation of the part. Specific applications may require modifications from these recommendations.

Please refer to the corresponding Product Specifications document for all pin descriptions.

Figure 1:

KX222 Application Schematic

36 Thornwood Dr.

—

Ithaca, NY 14850 USA

Tel: 607-257-1080

—

Fax: 607-257-1146

www.kionix.com

—

info@kionix.com

21 December 2017

Page 1 of 20

AN090

6. Sample Buffer Operation

6.1.

Sample Buffer-Full Interrupt via Physical Hardware Interrupt

Write 0x00 to Control Register 1 (CNTL1) to set the accelerometer in stand-by mode, to

set the performance mode of the accelerometer to Low Power mode, and G-range to ±8g.

CNTL1

Address

0x18

Value

0x00

Write 0x38 to Interrupt Control Register (INC1) to enable physical interrupt pin INT1, to set

the polarity of the physical interrupt to active high and to transmit interrupt pulse with a

period of 0.03 to 0.05 msec.

INC1

Address

0x1C

Value

0x38

Write 0x40 to Interrupt Control Register 4 (INC4) to set the Buffer Full interrupt to be

reported on physical interrupt pin INT1.

INC4

Address

0x1F

Value

0x40

Write 0x02 to Output Data Rate (ODR) Control Register (ODCNTL) to set the ODR of the

accelerometer to 50 Hz. (Note: This is also the default value.)

ODCNTL

Address

0x1B

Value

0x02

Write 0xA0 to Buffer Control Register 2 (BUF_CNTL2) to activate the sample buffer, to set

the resolution of the acceleration data samples collected to 8 bits, to enable report of the

interrupt status in INS2, and set the operating mode of the sample buffer to FIFO.

BUF_CNTL2

Address

0x3B

Value

0xA0

Write 0x80 to Control Register 1 (CNTL1) to set the accelerometer into operating mode

(PC1 = 1)

CNTL1

Address

0x18

Value

0x80

Once Buffer-Full Interrupt is issued on INT1 pin, acceleration data can then be read from

the Buffer Read (BUF_READ) register at address 0x3F in 2’s complement format. Also,

the interrupt would be reflected in Bit4 (INT) of STATUS_REG register and Bit6 (BFI) of

INS2 register. Since the resolution of the samples data was set to 8-bit, only the most

significant 8 bits of each sample will be stored in the buffer, and recorded in the following

order: X_HIGH, Y_HIGH, Z_HIGH with the oldest data point read first as it is a FIFO

buffer. The full buffer contains 2043 X, Y, Z elements, which corresponds to 681 unique

acceleration data samples.

21 December 2017

Page 4 of 20

KX224-1053-SR Related Products

	KX224-1053-SR	KX222-1054-EVB0A0	KX224-1053-EVB0B0	KX222-1054-SR
Description	MEMS DEVICE	KX222-1054 EVAL BOARD	KX224-1053 EVAL BOARD	MEMS DEVICE
Voltage - Power	1.71 V ~ 3.6 V	1.71 V ~ 3.6 V	1.71 V ~ 3.6 V	1.71 V ~ 3.6 V

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