POWERSTEP01 datasheet(61/92 Pages) STMICROELECTRONICS

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powerSTEP01

Programming manual

11.1.21

OCD_TH

The OCD_TH register contains the overcurrent threshold value (Section 7.9 on page 30 for

details). The available range is from 31.25 mV to 1 V, steps of 31.25 mV, as shown in

Table 25.

11.1.22

STALL_TH

This register is specific for voltage mode driving (see Section 8 on page 38).

The STALL_TH register contains the stall detection threshold value. The available range is

from 31.25 mV to 1 V with a resolution of 31.25 mV.

11.1.23

STEP_MODE

The STEP_MODE register has the following structure:

The CM_VM bit sets the current control method between voltage and current mode:

Table 25. Overcurrent detection threshold

OCD_TH [4 … 0]

Overcurrent detection threshold

31.25 mV

62.5 mV

……

…

968.75 mV

1 V

Table 26. Stall detection threshold

STALL_th [4 … 0]

Stall detection threshold

31.25 mV

62.5 mV

……

…

968.75 mV

1 V

Table 27. STEP_MODE register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

SYNC_EN

SYNC_SEL

CM_VM

STEP_SEL

Table 28. Control mode selection

CM_VM

Control mode

Voltage mode

Advanced current control (current mode)

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