L6482 datasheet(20/73 Pages) STMICROELECTRONICS

Part #	L6482

Description	cSPIN?? microstepping motor controller with motion engine and SPI

PDF	73 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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20 / 73 page

Functional description

L6482

20/73

Doc ID 023768 Rev 2

Figure 4.

Charge pump circuitry

6.4

Microstepping

The driver is able to divide the single step into up to 16 microsteps. Stepping mode can be

programmed by the STEP_SEL parameter in the STEP_MODE register (Table 22).

Step mode can only be changed when bridges are disabled. Every time the step mode is

changed, the electrical position (i.e. the point of microstepping sinewave that is generated)

is reset to the first microstep and the absolute position counter value (Section 6.5) becomes

meaningless.

Figure 5.

Normal mode and microstepping (16 microsteps)

S + VCP

PUMP

to high-side

gate drivers

S + VCP

BOOT

FLY

VBOOT

VDD

Charge pump oscillator

AM15034v1

step 1

step 2 step 3step 4

step 1

Reset

position

step 1

step 2 step 3step 4

Normal driving

Microstepping

PHASE A current

PHASE B current

PHASE A current

PHASE B current

microsteps

Reset

position

microsteps microsteps microsteps

AM15035v1

L6482 Datasheet(PDF) 20 Page - STMicroelectronics

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