L6474 datasheet(37/51 Pages) STMICROELECTRONICS

部件名	L6474

功能描述	easySPIN ??fully integrated microstepping motor driver

PDF	51 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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37 / 51 page

L6474

Programming manual

Doc ID 022529 Rev 2

37/51

9.1.10

STEP_MODE

The STEP_MODE register has the following structure:

The STEP_SEL parameter selects one of five possible stepping modes:

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.

Warning:

Every time STEP_SEL is changed the value in ABS_POS

Any attempt to write the register when the outputs are enabled causes the command to be

ignored and the NOTPERF_CMD flag to rise (see paragraph 9.1.13).

The SYNC output provides a synchronization signal according to SYNC_SEL parameter.

Table 18.

STEP_MODE register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

SYNC_SEL

1 (1)

When the register is written this bit should be set to 1.

STEP_SEL

Table 19.

Step mode selection

STEP_SEL[2..0]

Step mode

Full step

Half step

1/4 microstep

1/8 microstep

1/16 microstep

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