L6482 datasheet(58/73 Pages) STMICROELECTRONICS

58 / 73 page

Programming manual

L6482

58/73

Doc ID 023768 Rev 2

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

to be ignored and the NOTPERF_CMD flag to rise (see Section 9.1.21).

The EN_PRED bit sets if the predictive current control method is enabled or not.

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

to be ignored and the NOTPERF_CMD flag to rise (Section 9.1.20).

9.1.21

STATUS

The STATUS register has the following structure:

When the HiZ flag is high it indicates that the bridges are in high impedance state. Any

motion command causes the device to exit from High Z state (HardStop and SoftStop

included), unless error flags forcing a High Z state are active.

The UVLO flag is active low and is set by an undervoltage lockout or reset events (power-up

included).

The UVLO_ADC flag is active low and indicates an ADC undervoltage event.

The OCD flag is active low and indicates an overcurrent detection event.

The CMD_ERROR flag is active high and indicates that the command received by SPI can't

be performed or does not exist at all.

The SW_F reports the SW input status (low for open and high for closed).

The SW_EVN flag is active high and indicates a switch turn-on event (SW input falling

edge).

124 µs (8 kHz)

Table 42.

Motor supply voltage compensation enable

EN_PRED

Predictive current control

Disabled

Enabled

Table 41.

Switching period (continued)

TSW [4..0]

Switching period

Table 43.

STATUS register

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Unused

OCD

TH_SD

UVLO_AD

UVLO STCK_MOD

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

NOTPERF_CM

MOT_STATUS

DIR

SW_EV

SW_F

BUSY

HiZ

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