L9301 datasheet(13/54 Pages) STMICROELECTRONICS

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DS11400 Rev 9

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L9301

Discrete inputs

5.1

Output enable EN

The EN pin is the general output enable which allows the µC to immediately switch off the

output in case of need. Output driving is allowed only if this pin is driven to high level. The

device configuration can be changed only with EN pin is driven to low level.

An internal pull down is present on the pin.

5.2

Output enable input IN1 to IN8

These inputs allow the outputs, depending on the configuration selected, to be enabled

without the use of the SPI. The SPI command and the IN1-8 input are logically OR'd

together.

A logic ‘1’ on this input will enable the correspondent output no matter what the status of the

SPI command register is. A logic ‘0’ on this input will disable this output if the SPI command

stages are controlled only via the SPI. This input has a nominal 100 kΩ pull down resistor to

GND, which will pull this pin to ground if an open circuit condition occurs. This input is ideally

suited for loads that are pulse width modulated (PWM'd). This allows PWM control without

the use of the SPI inputs.

Table 11. Output enable input IN1 to IN8

RESET

INx

OUTx/DRNx/SRCx

OFF

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