austriamicrosystems AG is now ams AG
The technical content of this austriamicrosystems document is still valid.
Contact information:
Headquarters: ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0 e-Mail: [email protected]
Please visit our website at www.ams.com
AS5130 8 bit high speed magnetic rotary encoder
Demoboard Operation Manual
Low power Integrated Hall IC for human interface applications
OPERATION MANUAL
1 General Description
The AS5130 is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of
360°.
It is a system-on-chip, combining integrated Hall elements, analog front end and digital signal processing in a single device.
To measure the angle, only a simple two-pole magnet, rotating over the center of the chip is required.
The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 8 bit = 256 positions per revolution. This digital data is available as a serial bit stream and as a PWM signal.
In addition to the angle information, the strength of the magnetic field is also available as a 6-bit code.
Data transmission can be configured for 1-wire (PWM), 2-wires (CLK, DIO) or 3-wires (CLK, DIO, CS).
A software programmable (OTP) zero position simplifies assembly as the zero position of the magnet does not need to be mechanically aligned.
A Power Down Mode together with fast startup- and measurement cycles allows for very low average power consumption and makes the AS5130 also suitable for battery operated equipment. ams
AG still valid
The AS5130 Demoboard
The AS5130 demoboard measures the angle of a diametral magnet turning over the AS5130 sensor. It is controlled by a built-in microcontroller and shows the result on the LCD display or on the PC GUI via the USB interface.
The board is powered from the USB plug if it is connected to a PC, or from an external power supply on the
DC Jack (>7.5V) if the board works in stand alone mode without any PC. The angle and AGC values are displayed on the LCD screen in both modes. content
Dimensions of the demo board: 77mm x 84mm (3.03 x 3.30 inch).
Technical
Revision 1.0, 01-June-08 www.austriamicrosystems.com Page 1 of 7
AS5130 8 bit high speed magnetic rotary encoder
Demoboard Operation Manual
Figure 1: AS5130 demoboard, TOP side Figure 2: AS5130 demoboard, BOTTOM side
2 AS5130 Software
2.1
Getting Started
you need:
AG
2.2
• The AS5130 Demo Software installer, downloadable on the Austriamicrosystems website
• Win-XP® or Windows Vista® operating system
• ams still
The installation process consists of three steps:
• Unzip the Demoboard software installation AS5130Setup.zip in any local directory valid
• Execute the .msi setup file
• Follow the instructions on the screen
2.3
Software Usage
content
Before starting the software the board needs to be connected to the PC.
After starting the software, two modes can be selected: SSI-Readout and OTP.
For both modes, the following functions are present:
Technical
Figure 3: USB Connect
Revision 1.0, 01-June-08 www.austriamicrosystems.com Page 2 of 7
AS5130 8 bit high speed magnetic rotary encoder
Demoboard Operation Manual
USB:
Connected/No connection. If the demoboard is correctly connected to the PC, the software should find immediately the demo board.
Onboard / External:
Switch the actual AS5130 sensor from the on-board one (by default), to an external AS5130 connected on the “external AS5130 header” (see Figure 1).
2.4
SSI-Readout
After starting the demo software and selecting the “SSI-Readout” tab, the magnet angle, AGC value, PWM out value are displayed (see Figure 4).
For a correct reading of the magnet angle, the airgap between the AS5130 top side and the magnet should be chosen that the 0<AGC<63. If the AGC value reaches 63, the ALARM LED will blink to indicate that the magnet is too far away from the sensor, and the measurement is not accurate or not valid. ams
AG still valid content
Periodic Readout:
By unchecking this option, the angle and AGC values are not read anymore, and the displayed value keep their last state during the normal readout.
The read period can be adjusted between 50ms and 1s (default 100ms), to have more or less reactivity.
State:
Displays the state of the C2 pin on the selected AS5130. By default C2 = 0 (three wires mode).
The Lock indicator is the state of the lock bit in the serial stream. This bit should be always enabled.
Multiturn:
Counts the full turns of 360°
Traffic Lights (Diagnostic): (limits can be set) Technical
Revision 1.0, 01-June-08 www.austriamicrosystems.com Page 3 of 7
AS5130 8 bit high speed magnetic rotary encoder
Demoboard Operation Manual
Red: Out of range
Reverse Sensor Direction:
Change direction between “clockwise” and “counter clockwise”
Low Power:
Set the device into “sleep mode”
Wakeup:
Wake up the device from sleep mode
2.5
OTP
The “OTP” tab, displays the OTP configuration bit of the selected AS5130 sensor.
• In Onboard mode, the configuration bits can be temporary changed (access to the Read and Write functions only). After a new power up, the configuration bits are set back to their default state.
• In External mode, the AS5130 can be temporary configured, and can be permanently programmed too. The Read, Write and Prog functions are available. ams
AG still valid
Zero Position Programming:
Figure 5: OTP tab content
The Zero Position Programming tool is used to assign a zero value to a defined mechanical position.
Move the magnet to a desired reference position, which is the mechanical 0°.
Click on “Get absolute position”. The actual angle seen on the sensor side is displayed in decimal and binary (Z7..0 bits).
Click on “Write zero position”. The bits Z7..0 are written to the Zero Position register of the AS5130.
Now the actual mechanical angle is the 0° angle on the AS5130 side.
This value can be permanently fused on an external AS5130 sensor by clicking on Prog.
OTP registers:
In On-board mode, the OTP registers can’t be permanently fused.
• Read: Reads back the OTP configuration registers of the selected sensor.
• Write: Writes the configuration bits as represented in the checkboxes to the selected AS5130. Those bits won’t be permanently written, and will be lost if the sensor is powered down. Technical
Revision 1.0, 01-June-08 www.austriamicrosystems.com Page 4 of 7
AS5130 8 bit high speed magnetic rotary encoder
Demoboard Operation Manual
• Prog (external mode only): After having written the configuration bits to the AS5130, those bits can be permanently fused by clicking on Prog. After a new power up of the device, this new configuration is enabled.
Test Polling Mode:
After clicking the button “Test Polling mode” the current angle will be stored and VDD disabled. By changing the angle, a wake-up signal will be generated and the VDD will be enabled again, without changing the angle, no wake up signal will be generated automatically and the devices goes to normal mode.
By setting the bit “Wake enable” , a signal to the Expansion connector will be send.
Enable Sin/Cos Setting: by setting this bit, a new tab will be opened – but without function!!
3 AS5130 Demoboard hardware
ams
AG still valid content
Figure 6: AS5130_DB_1.0 Demoboard schematics
3.1.1
Power supply
The demoboard is powered directly from the USB plug of a PC or from an external DC power supply (>7.5V, 100mA) connected on the DC jack J6 and regulated through a 5V voltage regulator (I1, ZR78L05).
The programming high voltage (8.5V) for the external AS5130 is generated directly from the 5V source through a DC/DC step-up converter U3. This source is used for the LCD power supply as well, for the contrast control through the P1 potentiometer.
The U2 voltage regulator is necessary for the 3.3V LCD power supply. Technical
Revision 1.0, 01-June-08 www.austriamicrosystems.com Page 5 of 7
AS5130 8 bit high speed magnetic rotary encoder
Demoboard Operation Manual
3.1.2
AS5130 Encoder
The AS5130 (U4) is running with the 5V source. The resistor R27 (0R) can be removed if the user wants to use his own power supply for his own tests.
The SSI serial interface (DIO, CS, DCLK) is controlled by the microcontroller U5.
The LED D7 is directly connected to the AS5130 on the MagRngn pin on one side, and on U5 for the other side to make it blinking if MagRngn = 5V (magnet too far away).
The PWM LED is directly connected on the PWM signal of U4.
The Test3..0 signals are connected to U5 but are not used.
3.1.3
Microcontroller
The microcontroller PIC 18F4550 (U5) from Microchip includes an on-chip USB interface.
The U1 switch enables the bootloader mode of the microcontroller, if pressed during power up.
In normal mode, pressing the switch makes the microcontroller writing the zero position value into the active AS5130.
The connector U7 is used for ISP programming of the microcontroller only.
3.1.4
J4 connector for external AS5130
An external AS5130 device can be wired to this connector. It allows the user to test his own board, and/or fuse the configuration bits for the mass production.
• Pin 1: ePROG.
Is the 8.5V source for fusing. The high voltage is switched only during the programming phase.
• Pin 2: eCS
Is an independent CS signal provided by the microcontroller, only for the external sensor
• Pin 3: eDIO
Is the same signal as DIO used for the on board sensor. Both are connected through the R14 resistor (0R). Only one sensor, on-board or external, can be selected at the same time with the CS and eCS signal.
• Pin 4: eDCLK ams
AG one sensor, on-board or external, can be selected at the same time with the CS and eCS signal.
• Pin 5: 5V
Is the power supply of the external sensor
• Pin 6: 3.3V
• Pin 7: VSS
• Pin 8: eVOUT
Analog input. Not used still valid
4 Troubleshooting
• Running the demo software
Before starting the demo software the demo board needs to be connected to the USB port of the PC.
1.
Connect to the USB port.
2.
Start the software.
• Closing the demo software
After finishing the work with the demo board the software needs to be closed before disconnecting the demo board.
1.
Close the software.
2.
Disconnect from the USB port.
Technical
Revision 1.0, 01-June-08 www.austriamicrosystems.com Page 6 of 7
AS5130 8 bit high speed magnetic rotary encoder
Demoboard Operation Manual
Table of contents
1 General Description........................................................................................................................................................... 1
The AS5130 Demoboard........................................................................................................................................................ 1
2 AS5130 Software............................................................................................................................................................... 2
2.1
Getting Started.......................................................................................................................................................... 2
2.2
Installing the Software .............................................................................................................................................. 2
2.3
Software Usage ........................................................................................................................................................ 2
2.4
SSI-Readout ............................................................................................................................................................. 3
2.5
OTP .......................................................................................................................................................................... 4
3 AS5130 Demoboard hardware .......................................................................................................................................... 5
4 Troubleshooting................................................................................................................................................................. 6
Table of contents........................................................................................................................................................................ 7
Copyrights .................................................................................................................................................................................. 7
Disclaimer................................................................................................................................................................................... 7
Contact Information .................................................................................................................................................................... 7
Copyrights
AG stored, or used without the prior written consent of the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
This product is protected by U.S. Patent No. 7,095,228.
Disclaimer
ams still
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its
Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems
AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental valid requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. content data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters austriamicrosystems AG
A-8141 Schloss Premstaetten, Austria
Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01
For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com Technical
Revision 1.0, 01-June-08 www.austriamicrosystems.com Page 7 of 7
