UM0759

General description

Doc ID 16058 Rev 2

17/26

PWM duty-cycle and frequency control

●

PWM Duty-cycle control

Range:

[0, 100] %

Step:

1

Default:

50

%

Figure 15.

PWM duty

●

PWM frequency control

Range:

[20, 30000] Hz

Step:

1

Default:

10000Hz

Figure 16.

PWM frequency control

To adjust PWM control bars will change the duty-cycle and frequency of L9958's PWM input

signal. But if the motor was freewheeling, the action clicking the control roll didn't change the

current status, PWM duty-cycle unchanged.

Table 6.

EN/DI/DIR switch map

Switch

EN

DI

DIR

Bit “ACT”

Bridge status

Forward

“1”

On-state

Break

“0”

tri-state

Reverse

“1”

On-state

Break

“0”

tri-state