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Revision 2.3

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AS5134

Datasheet - Detailed Descr i pti on

7.5 Serial 2-Wire Differential SSI Connection

With the addition of a RS-422 / RS-485 transceiver, a fully differential data transmission, according to the 21-bit SSI interface standard is

possible. To be compatible with this standard, the DCLK signal must be inverted. This is done by reversing the Data+ and Data- lines of the

transceiver.

Note: This type of transmission is read-only.

Figure 7. 2-Wire SSI Read-only Mode

Refer to Table 6 on page 9 for information on 2-or 3-wire Read-only Serial Bit Sequence (21-bit read).

+5V

VDD

VDD

DCLK

DIO

VSS

VSS

C2

100nF

VSS

VDD

Input

Output

DCLK

DI

D+

D-

D+

D-

D-

D-

D+

D+

MAX 3081 or similar

1

2

3

4

5

6

7

8

20

21

D15

D14

D1

D0

timeout

DCLK

DI