L6474PD View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6474PD

Fully integrated microstepping motor driver

STMicroelectronics 

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L6474

Programming manual

Table 11. Torque regulation register

TVAL [60]

Output current amplitude

0

0

0

0

0

0

0

31.25 mA

0

0

0

0

0

0

1

62.5 mA

9.1.5

1

1

1

1

1

1

0

1

1

1

1

1

1

1

3.969 A

4A

T_FAST

The T_FAST register contains the maximum fast decay time (TOFF_FAST) and the

maximum fall step time (FALL_STEP) used by the current control system (see Section 7.2

on page 28 and Section 7.3 on page 29 for details):

Bit 7

Bit 6

Table 12. T_FAST register

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

TOFF_FAST

FAST_STEP

The available range for both parameters is from 2 µs to 32 µs.

Table 13. Maximum fast decay times

TOFF_FAST [30]

FAST_STEP[30]

Fast decay time

0

0

0

0

2 µs

0

0

0

1

4 µs

9.1.6

1

1

1

0

1

1

1

1

28 µs

32 µs

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

be ignored and the NOTPERF_CMD to rise (see Section 9.1.13 on page 41).

TON_MIN

The TON_MIN register contains the minimum ON time value used by the current control

system (see Section 7.2).

The available range for both parameters is from 0.5 µs to 64 µs.

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