as5134 austriamicrosystems, as5134 Datasheet - Page 9

• Manufacturer Part Number: as5134
• Description: 360?programmable High Speed Bldc Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5134
Data Sheet - D e t a i l e d D e s c r i p t i o n
Table 5. Serial Bit Sequence (16bit read/write)
Serial 3-Wire Read-only Connection
This simplified connection is possible when the AS5134 is only used to provide the angular data (no power down or
OTP access). The Chip Select (CS) and Clock (DCLK) connection is the same as in the R/W mode, but only a digital
input pin (not an I/O pin) is required for the DIO connection. As the first 5 bits of the data transmission are command
bits sent to the AS5134, both the microcontroller and the AS5134 are configured as digital inputs during this phase.
Therefore, a pull-down resistor must be added to make sure that the AS5134 reads “00000” as the first 5 bits, which
sets the Read_Angle command.
Note: All further application examples are shown in R/W mode, however read-only mode is also possible unless
Figure 4. SSI Read-only Serial Data Transmission
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C4 C3
Write Command
otherwise noted.
DCLK
DIO
DIO
C2
CS
C1
C0 D15 D14 D13 D12 D11 D10 D9
t1
t3
CMD4
VSS
VDD
+5V
t4
1
t
CLK
CMD3
command phase
VDD
VSS
2
Output
Output
Input
3
10k…
100k
Revision 1.6
4
CMD0
t5
t6
5
Read/Write Data
CS
DCLK
DIO
t7
D15
D8
t8
data phase
6
VDD
D7
C2
D14
VSS
D6
7
D1
100n
20
D5
D0
D4
t9
21
t10
D3
DIO read
DIO write
D2
D1
9 - 29
D0