DRV8320 Datasheet, PDF (49/80 Pages) Texas Instruments – 6 to 60-V Three-Phase Smart Gate Driver

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DRV8320, DRV8320R
DRV8323, DRV8323R
SLVSDJ3 – FEBRUARY 2017
Programming (continued)
8.5.1.1.1 SPI Format
The SDI input data word is 16 bits long and consists of the following format:
• 1 read or write bit, W (bit B15)
• 4 address bits, A (bits B14 through B11)
• 11 data bits, D (bits B11 through B0)
The SDO output data word is 16 bits long and the first 5 bits are don't care bits. The data word is the content of
the register being accessed.
For a write command (W0 = 0), the response word on the SDO pin is the data currently in the register being
written to.
For a read command (W0 = 1), the response word is the data currently in the register being read.
Table 7. SDI Input Data Word Format
R/W
ADDRESS
DATA
B15 B14 B13 B12 B11 B10 B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
W0 A3
A2
A1
A0 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Table 8. SDO Output Data Word Format
DON'T CARE BITS
DATA
B15 B14 B13 B12 B11 B10 B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
X
X
X
X
X
D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
nSCS
SCLK
SDI
X
MSB
LSB
X
SDO
Z
MSB
LSB
Z
Capture
Point
Propagate
Point
Figure 43. SPI Slave Timing Diagram
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