POWERSTEP01 datasheet(59/92 Pages) STMICROELECTRONICS

59 / 92 page

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powerSTEP01

Programming manual

Any attempt to write to the register when the motor is running causes the command to be

ignored and CMD_ERROR to rise (Section 11.1.28 on page 71).

11.1.18

TON_MIN

This register is specific for current mode driving (see Section 9 on page 43).

This parameter is used by the current control system when current mode operation is

selected.

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

system (see Section 9.2 on page 44).

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 CMD_ERROR to rise (see Section 11.1.28).

11.1.19

TOFF_MIN

This register is specific for current mode driving (see Section 9).

This parameter is used by the current control system when current mode operation is

selected.

The TOFF_MIN register contains the minimum off-time value used by the current control

system (see Section 9.1 on page 43 for details).

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

Table 20. Maximum fast decay times

TOFF_FAST [3 … 0] FAST_STEP [3 … 0]

Fast decay time

2 µs

4 µs

28 µs

32 µs

Table 21. Minimum on-time

TON MIN [6 … 0]

Time

0.5 µs

1 µs

63.5 µs

64 µs

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