L6474PD View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6474PD

Fully integrated microstepping motor driver

STMicroelectronics 

Prev 21 22 23 24 25 26 27 28 29 30 Next

Functional description

L6474

7%%

P$

Figure 8. Internal 3 V linear regulator

7

73&(

7%%

7T

74"

74#

7#"5

7

3&(

7T

73&(

7%%

74"

74#

*$

*$

%(/%

"(/%

%(/%

"(/%

-PHJH
TVQQMJFE
CZ

*/5&3/"-
WPMUBHF
SFHVMBUPS

-PHJH
TVQQMJFE
CZ

&95&3/"-
WPMUBHF
SFHVMBUPS

6.16

6.17

SYNC pin

This pin works as a synchronization signal: the output status is an echo of one of the bits of

the EL_POS register according to a SYNC_SEL and STEP_SEL parameter combination

(see Section 9.1.10 on page 38).

FLAG pin

By default, an internal open drain transistor pulls the FLAG pin to ground when at least one

of the following conditions occurs:

 Power-up or standby/reset exit

 Overcurrent detection

 Thermal warning

 Thermal shutdown

 UVLO

 Switch turn-on event

 Wrong command

 Non performable command.

It is possible to mask one or more alarm conditions by programming the ALARM_EN

register (see Section 9.1.11 on page 39, Table 21). If the corresponding bit of the

ALARM_EN register is low, the alarm condition is masked and it does not cause a FLAG pin

transition; all other actions imposed by alarm conditions are performed anyway. In case of

daisy chain configuration, FLAG pins of different ICs can be or-wired to save host controller

GPIOs.

26/53

DocID022529 Rev 4

Share Link: