37.2.6.5 Operation Before Dynamic Address Assignment

Before a Dynamic Address is assigned (or after the Dynamic Address is cleared) and the Static Address SDR mode is deactivated, the Target operates in I2C mode (OPMD = 0b00). In this mode, the Target behaves as follows:
  • The Target responds and appropriately processes all supported Broadcast Common Command Codes (CCCs) as specified in Supported CCCs, including ENTDAA CCC (in accordance with HJCAP bit setting).
  • The Target recognizes and appropriately processes all HDR Entry and Exit patterns as specified in High Data Rate (HDR) Modes.
  • The Target disregards all Direct CCC transactions since it does not have an assigned Dynamic Address to process them, but the Target properly recognizes the ends of all supported and unsupported CCCs as specified in End of a CCC Command.
  • The Target participates in Legacy I2C transactions using its Static Address.
  • The Target can send a Hot-Join request, but not an In-Band Interrupt request.
Important: If the user has enabled the 50 ns spike filters on the SDA/SCL pads (FLTEN = 1), then the Target may not respond to Broadcast CCC or HDR Entry/Exit patterns properly if the Controller is sending small pulses on the bus to exclude I2C devices from the communication.