as5046 austriamicrosystems, as5046 Datasheet - Page 10

• Manufacturer Part Number: as5046
• Description: Programmable 12-bit 360? Magnetic Angle Encoder With Absolute 2-wire Serial And Analog Interfaces
• Manufacturer: austriamicrosystems

AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet
8
The AS5046 is accessible via an bi-directional serial interface.
CSn must be low during serial data transmission.
8.1
The registers in the AS5046 are available in a data length of 8 bit (1 byte), 24 bit (3 bytes) and 32 bit (4 bytes).
Shown below in Figure 6 is a common 8-bit data transfer.
Figure 7 shows a transfer timing diagram for the first 16 bits of the Serial Interface Unit.
9
Revision 1.0
Status Register
Serial Interface Unit
Hall Sensor Front End
ADC outputs, SIN/COS
signal bus
Automatic Gain Control 0111
Two Wire Serial Interface
Accessible Registers for serial Interface
Serial Interface Timing Diagrams
0101
0001
0100
Identifier
Internal
Type
000
000 -111 fixed address range
000
000
Fixed address
fixed address
Address
Figure 7: 16-bit serial Read / Write timing
Internal
Programmable with
A2...A0
Figure 6: 8-bit serial Read / Write timing
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Table 2: Serial register overview
1)
Register
Count
Bit
24
32
8
8
Read / Write
Read / Write
Read / Write
Read only
Read /
Write
2)
3)
12bit SIN , 12bit COS input
AGC Counter
10 bit angle <upper 10bits: D11:D2>
6 bit status
8bit magnitude
2 bit angle <lower 2 bits: D1:D0>
8 selectable Hall front-end status
registers
Note
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