STMicroelectronics Fully integrated stepper motor driver mounting the L6472 in a high power PowerSO package EVAL6472PD EVAL6472PD Datenbogen

Produktcode

EVAL6472PD

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L6472

Programming manual

9.1.11 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

for details):

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

Any attempt to write to the register when the motor is running causes the command to be
ignored and NOTPERF_CMD to rise (see

Section 9.1.19 on page 52

9.1.12 TON_MIN

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

Section 7.2 on page 34

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

Any attempt to write to the register when the motor is running causes the command to be
ignored and the NOTPERF_CMD to rise (see

Section 9.1.19

Table 13. T_FAST register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

TOFF_FAST

FAST_STEP

Table 14. Maximum fast decay times

TOFF_FAST [3 … 0] FAST_STEP [3 … 0]

Fast decay time

0 0 0 0

µs

0 0 0 1

µs

…

1 1 1 0

µs

1 1 1 1

µs

Table 15. Minimum ON time

TON_MIN [6 … 0]

Time

0 0 0 0 0 0 0

0.5

µs

0 0 0 0 0 0 1

µs

…

1 1 1 1 1 1 0

63.5

µs

1 1 1 1 1 1 1

µs