DRV8711 Datasheet, PDF (24/34 Pages) Texas Instruments – STEPPER MOTOR CONTROLLER IC

DRV8711
SLVSC40 – JUNE 2013
www.ti.com
Serial Data Format
The serial data consists of a 16-bit serial write, with a read/write bit, 3 address bits and 12 data bits. The three
address bits identify one of the registers defined in the register section above.
To write to a register, data is shifted in after the address as shown in the timing diagram below:
SCS
SCLK
1
2
3
4
5
6
7
8 Note 1 9
10
11
12
13
14
15
16
SDATI
WRT A2
A1
A0 D11 D10
D9
D8
X
D7 D6
D5
D4 D3
D2
D1
D0
A. Any amount of time may pass between bits, as long as SCS stays active high. This allows two 8-bit writes to be used.
Figure 10. Write Operation
Data may be read from the registers through the SDATO pin. During a read operation, only the address is used
form the SDATI pin; the data bits following are ignored. Reading is enabled by setting the READ bit at the
beginning of the access:
SCS
SCLK
1
2
3
4
5
6
7
8
Note 1 ₉
10
11
12
13
164
15
16
SDATI
READ A2
A1
A0
SDATO
D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
(1) Any amount of time may pass between bits, as long as SCS stays active high. This allows two 8-bit writes to be used.
Figure 11. Read Operation
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