UM0839 datasheet(22/32 Pages) STMICROELECTRONICS

Part #	UM0839

Description	ST L9942 evaluation board

PDF	32 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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22 / 32 page

Configure L9942 graphic user interface

UM0839

22/32

Doc ID 16519 Rev 2

11.1.10

Filter time (FT)

11.1.11

SST

Figure 15.

SPI control area

After configuring SPI menu, the configured SPI command will be automatically sent to

L9942.

11.2

Motor control command field

This field is purposed to control motor command: motor enable, PWM frequency, PWM

duty-cycle, PWM cycles, motor direction control.

SPI-DIN Bit:

Description

This bit set filter time in glitch filter.

Value:

TF=1.5us

→ 0

TF=2.5us

→ 1

Default:

SPI-DIN Bit

Description

his bit specifies output PWM to reflect same logical level like bit ST

Value:

Output PWM not reflect bit ST

→ 0

Output PWM reflect bit ST

→ 1

Default:

SPI-DIN Bit

UM0839 Datasheet(PDF) 22 Page - STMicroelectronics