L6474PD View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6474PD

Fully integrated microstepping motor driver

STMicroelectronics 

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L6474

Programming manual

9.1.11

The synchronization signal is obtained starting from electrical position information (EL_POS

register) according to Table 10 on page 34:

Table 20. SYNC signal source

SYNC_SEL[20]

0

0

0

0

0

1

0

1

0

0

1

1

1

0

0

1

0

1

1

1

0

1

1

1

1. When this value is selected the BUSY output is forced low.

Source

EL_POS [7]

EL_POS [6]

EL_POS [5]

EL_POS [4]

EL_POS [3]

UNUSED(1)

UNUSED(1)

UNUSED(1)

ALARM_EN

The ALARM_EN register allows to select which alarm signals are used to generate the

FLAG output. If the respective bit of the ALARM_EN register is set high, the alarm condition

forces the FLAG pin output down.

ALARM_EN bit

0 (LSB)

1

2

3

4

5

6

7 (MSB)

Table 21. ALARM_EN register

Alarm condition

Overcurrent

Thermal shutdown

Thermal warning

Undervoltage

RESERVED

RESERVED

Switch turn-on event

Wrong or not performable command

9.1.12

CONFIG

The CONFIG register has the following structure:

Bit 15

0

Bit 7

OC_SD

Table 22. CONFIG register

Bit 14

Bit 13

Bit 12

Bit 11

TOFF

Bit 6

Bit 5

RESERVED EN_TQREG

Bit 4

0

Bit 3

EXT_CLK

Bit 10 Bit 9 Bit 8

POW_SR

Bit 2

Bit 1 Bit 0

OSC_SEL

DocID022529 Rev 4

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