3 Replies Latest reply on Aug 5, 2019 8:41 PM by AH_96

    CY8CMBR3106 interrupt voltage level

    MaRa_4092696

      Can the /HI pin use a 1.8V pullup while the CY8CMBR3106 is supplied from 3.3V?

       

      I need to power the 3106 from 3.3V, and I have 3.3V-referenced I2C. But the controller that will receive the hardware interrupt is a 1.8V device. The datasheet ("Host Interrupt" section) describes the host interrupt pin as open drain. But the very next bullet describes the VDDIO supply on the 3108 and how it enables comm at lower voltage levels.

       

      So the datasheet is not perfectly clear. Is the '3106 host interrupt a true open drain that can be referenced to voltage levels lower than VDD?

       

      Thanks