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PDF HMR3100 Data sheet ( Hoja de datos )
| Número de pieza | HMR3100 | |
| Descripción | DIGITAL COMPASS SOLUTION | |
| Fabricantes | Honeywell | |
| Logotipo |  |
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HMR3100
SENSOR PRODUCTS
DIGITAL COMPASS SOLUTION
Features
• 5° Heading Accuracy, 0.5° Resolution
• 2-axis Capability
• Small Size (19mm x 19mm x 4.5mm), Light Weight
• Advanced Hard Iron Calibration Routine for Stray
Fields and Ferrous Objects
• 0° to 70°C Operating Temperature Range
• 2.6 to 5 volt DC Single Supply Operation
General Description
The Honeywell HMR3100 is a low cost, two-axis
electronic compassing solution used to derive heading
output. Honeywell’s magnetoresistive sensors are
utilized to provide the reliability and accuracy of these
small, solid state compass designs. The HMR3100
communicates through binary data and ASCII
characters at four selectable baud rates of 2400, 4800,
9600, or 19200. This compass solution is easily
integrated into systems using a simple USART
interface.
Top Side
APPLICATIONS
• Vehicle Compassing
• Hand-Held Electronics
• Telescope Positioning
• Navigation Systems
Bottom Side
Block Diagram
HMC1022
VCC
CPU
RXD
TXD
RTS
GND
Solid State Electronics Center • www.magneticsensors.com • (800) 323-8295 • Page 1
1 page  
HMR3100
SENSOR PRODUCTS
Figure 3
Continuous Mode Timing Diagram
Calibration Mode
When the host processor pulses low the RTS pin, and sends the RXD pin to a low logic level, the HMR3100 is in
hard-iron calibration mode. This calibration is only for nearby magnetized metals (hard-iron) that are fixed in position
with the HMR3100. At a moderate rate (5 seconds or more per rotation), rotate the HMR3100/host assembly two
complete circles (on a flat, non-magnetic surface if possible) to allow the HMR3100 to take measurements for
compass calibration. At the completion of the rotations, return the RXD to a high logic level. The HMR3100 will return
to sleep mode until another active mode has been initiated. Upon initiation of the calibration mode, the
microcontroller shall output an ASCII STA (53 54 41 hex) indicating a start of calibration and then an ASCII RDY (52
44 59 hex) at the completion of the rotations and the RXD line returned high. Figure 4 shows the calibration mode
timing diagram.
Figure 4
Calibration Mode Timing Diagram
Figure 4
Calibration Mode Timing Diagram
Solid State Electronics Center • www.magneticsensors.com • (800) 323-8295 • Page 5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet HMR3100.PDF ] | |
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