AS5030_1 datasheet(10/33 Pages) AMSCO

10 / 33 page

AS5030 8-bit Programmable Magnetic Rotary Encoder

Rev. 1.8

www.austriamicrosystems.com

Page 10 of 33

2-or 3-wire read-only serial bit sequence (21bit read):

Read

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

AGC

Angle

lock

Figure 7: Timing diagram in 2-wire and 3-wire SSI mode

4.15 Serial 2-Wire Connection (R/W Mode)

By connecting the configuration input C2 to VDD, the AS5030

is configured to 2-wire data transmission mode.

Only Clock (CLK) and Data (DIO) signals are required. A Chip

Select (CS) signal is automatically generated by the DX output,

when a time-out of CLK occurs (typ. 20µs).

Note: Read-only mode is also possible in this configuration

Figure 8: SSI R/W mode 2-wire data transmission

Figure 9: Timing diagram in 2-wire SSI mode

AS5030

Micro

Controller

100n

CLK

DIO

+5V

VDD

VSS

VDD

VSS

I/O

Output

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