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DLPC3433: I2C communication Before Low state of HOSTIRQ

Part Number: DLPC3433

Tool/software:

can there be i2c communication on the i2c bus before host_irq goes low?  For example: Can the master start sending messages to the DLPC3433, before host_irq is low, and waiting for an acknowledgment transaction vs waiting for host_irq pin?  

We see notes in the datasheet that "I 2C activity cannot start until HOST_IRQ goes low to indicate auto-initialization completes."   During the initialization, can there be activity on the I2C bus for other devices during this time? 

  • Hi Nathan,

    It is not recommended to send any I2C communication before Host_IRQ transitions. This is because Host_IRQ indicates the DLPC is busy doing some internal processing, hence why we recommend using it as a busy signal.

    Best,

    Maximus