L6474 datasheet(25/51 Pages) STMICROELECTRONICS

部品番号	L6474

部品情報	easySPIN ??fully integrated microstepping motor driver

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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25 / 51 page

L6474

Functional description

Doc ID 022529 Rev 2

25/51

Figure 8.

Internal 3 V linear regulator

6.16

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 paragraph 9.1.10).

6.17

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

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.

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