LATCH

CLK

1

xxx

xxx

xxx

xxx

1

2

1

2

3

3

4

5

6

1

2

3

4

5

6

Part 2

Part 1

Part 3

Part 4

DRV8860, DRV8860A

SLRS065E – SEPTEMBER 2013 – REVISED NOVEMBER 2015

www.ti.com

Programming (continued)

8.5.1.3 Special Command

Besides output ON/OFF control and fault status reading back, DRV8860 has special functions to make system

more robust or power efficient. These functions will need special command to initiate the device or configure the

internal registers.

There are 5 Special Commands:

1. Write Control Register command

2. Read Control Register command

3. Read Data Register command

4. Fault Register Reset command

5. PWM Start command

Special wave form pattern on CLK and LATCH pin will issue the special command, as below

Figure 17. Special Command

CLK CYCLES IN EACH PART

SPECIAL COMMAND

Part 1

Part 2

Part 3

Part 4

Write Control Register

1

2

2

3

Read Control Register

1

4

2

3

Read Data Register

1

4

4

3

Fault Register Reset

1

2

4

3

PWM Start

1

6

6

3

18

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