Overview 1 The Honeywell HMC5883L is a surface mount multi chip module designed for low field magnetic sensing with a digital interface for applications such as low cost compassing and magnetometry 2 The HMC5883L includes our state of the art high resolution HMC118X series magneto resistive sensors plus an ASIC containing amplification automatic degaussing strap drivers offset cancellation and a 12 bit ADC that enables 1° to 2° compass heading accuracy The I 2 C serial bus allows for easy interface The HMC5883L is a 3 0x3 0x0 9mm surface mount 16 pin leadless chip carrier LCC Applications for the HMC5883L include Mobile Phones Netbooks Consumer Electronics Auto Navigation Systems and Personal Navigation Devices 3 The HMC5883L utilizes Honeywell s Anisotropic Magnetoresistive AMR technology that provides advantages over other magnetic sensor technologies These anisotropic directional sensors feature precision in axis sensitivity and linearity 4 These sensors solid state construction with very low cross axis sensitivity is designed to measure both the direction andthe magn1tude of Earth s magnetic fields from milli gauss to 8 gauss Honeywell s Magnetic Sensors are among the mostsensitive and reliable low field sensors in the industry Features 1 GY 271M can directly replace the GY 271 HMC5883L module the program is universal no need to modify the hardware and software 2 Provide 51 MCU code software directly using the HMC5883 chip on the line M