L6474PD View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6474PD

Fully integrated microstepping motor driver

STMicroelectronics 

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L6474

9

Programming manual

Programming manual

9.1

Registers and flags description

Table 9 is a map of the user registers available (detailed description in respective

paragraphs):

Table 9. Register map

Address

[Hex]

Register

name

Register function

Len.

[bit]

Reset

Hex

Reset value

Remarks(1)

h01

ABS_POS Current position 22 000000

0

h02

EL_POS Electrical position 9 000

0

h03

MARK

Mark position

22 000000

0

h04 RESERVED Reserved address 24

h05 RESERVED Reserved address 16

h06 RESERVED Reserved address 16

h07 RESERVED Reserved address 16

h08 RESERVED Reserved address 16

R, WR

R, WR

R, WR

h15 RESERVED Reserved address 16

h09

TVAL

Reference current 7

29

h0A RESERVED Reserved address 8

h0B RESERVED Reserved address 8

h0C RESERVED Reserved address 8

h0D RESERVED Reserved address 16

h0E

T_FAST

Fast decay/fall

step time

8

19

h0F

TON_MIN Minimum ON time 7

29

h10

TOFF_MIN

Minimum OFF

time

7

29

h11 RESERVED Reserved address 8

h12

ADC_OUT

ADC output

5 XX (2)

h13

OCD_TH

OCD threshold 4

8

h14 RESERVED Reserved address 8

1.3125 A

1 µs / 5 µs

20.5 µs

20.5 µs

3.38A

R, WR

R, WR

R, WH

R, WH

R, WH

R

R, WR

h16 STEP_MODE

Step mode

8

7

16 microsteps, no synch

h17 ALARM_EN Alarms enables 8

FF

All alarms enabled

Internal oscillator, 2 MHz OSCOUT

clock, supply voltage compensation

h18

CONFIG

IC configuration 16 2E88

disabled, overcurrent shutdown

enabled, slew rate = 290 V/µs

TOFF = 40 µs

R, WH

R, WR

R, WH

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