L6470PD datasheet(63/70 Pages) STMICROELECTRONICS

63 / 70 page

L6470

Programming manual

Doc ID16737 Rev 5

63/70

9.2.15

ResetDevice

The ResetDevice command resets the device to power-up conditions (see Section 6.1).

Note:

At power-up the power bridges are disabled.

9.2.16

SoftStop

The SoftStop command causes an immediate deceleration to zero speed and a consequent

motor stop; the deceleration value used is the one stored in the DEC register (see

Section 9.1.6).

When the motor is in high impedance state, a SoftStop command forces the bridges to exit

from high impedance state; no motion is performed.

This command can be given anytime and is immediately executed. This command keeps

the BUSY flag low until the motor is stopped.

9.2.17

HardStop

The HardStop command causes an immediate motor stop with infinite deceleration.

When the motor is in high impedance state, a HardStop command forces the bridges to exit

from high impedance state; no motion is performed.

This command can be given anytime and is immediately executed. This command keeps

the BUSY flag low until the motor is stopped.

9.2.18

SoftHiZ

Table 51.

ResetDevice command structure

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

from host

Table 52.

SoftStop command structure

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

from host

Table 53.

HardStop command structure

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

from host

Table 54.

SoftHiZ command structure

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

101000

from host

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