l5953 STMicroelectronics, l5953 Datasheet - Page 24

• Manufacturer Part Number: l5953
• Description: Multiple Switching Voltage Regulator
• Manufacturer: STMicroelectronics

Summary of the main operations
5.9
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IRQ - Interrupt request pin
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It is an open drain pin activated (low) every time a variation occurs in the diagnostic
register.
Purpose: to alert the μP that one or more warning bit of the diagnostic register has
changed from 0 to 1 or from 1 to 0.
An activation of this pin puts the bit s0 of the status register to 1 (start diagnostic) like
an operation e (diagnostic procedure start). Then an operation F has to be executed
without an operation E before.
After an operation F, the IRQ pin is deactivated, and goes to 1 if connected to a pull-up
resistor.
L5953