Page 24

ams Datasheet

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[v1-00] 2014-Aug-11

AS5600 − Detailed Description

Figure 26:

Option C: Programming a Maximum Angular Range Through the I²C Interface

Note(s) and/or Footnote(s):

1. After each register command, the new configuration is effective at the output at least 1 ms later.

2. It is recommended to perform a functional test after this procedure.

Output Stage

The OUTS bits in the CONF register are used to choose between

an analog ratiometric output (default) and a digital PWM

output. If PWM is selected, the DAC is powered down.

Without regard to which output is enabled, an external unit can

read the angle from the ANGLE register through I²C interface at

any time.

Analog Output Mode

By default, the AS5600 output stage is configured as analog

ratiometric output. The Digital to Analog Converter (DAC) has

12-bit resolution. In default mode, the lower reference voltage

for the DAC is GND, while the upper reference voltage is VDD.

The output voltage on the OUT pin is ratiometric between GND

and VDD.

Use the correct hardware configuration shown in Figure 37 and Figure 38.

Step 1

Power up the AS5600.

Step 2

Use the I²C interface to write the maximum angular range into the MANG register. For example, if

the maximum angular range is 90 degrees, write the MANG register with 0x400.

Configure additional configuration settings by writing the CONFIG register.

Wait at least 1 ms.

Proceed with Step 3 to permanently program the configuration.

Step 3

Perform a BURN_SETTINGS command to permanently program the device.

Wait at least 1 ms.

Step 4

Verify the BURN_SETTINGS command:

Write the commands 0x01, 0x11 and 0x10 sequentially into the register 0xFF to load the actual OTP

content.

Read and verify the MANG and CONF registers to verify that the BURN_SETTINGS command was

successful.

Proceed with Step 5 to permanently program a zero position. If the OUT pin is used for this option, the PGO pin

must be connected to GND.

Step 5

Position the magnet in the start position (zero angle).

Step 6

Pull the OUT pin to GND for at least 100 ms, then allow the pin to float. Alternatively, program the

zero position through the I²C interface (Option A).

Wait at least 1 ms.

Step 7

Verify the permanent programming by I²C (Option A) or check if OUT is permanently driven to GND

(Option B).

Step 8

Read and verify the permanently programmed registers again after a new power-up cycle.