The Controller can use the Reset Dynamic Address Assignment (
RSTDAA) CCC to
require devices to clear/reset their Controller-assigned Dynamic Address. The RSTDAA CCC
can be broadcast to all devices on the bus or can be sent directly to a specific device
as well. After this, the Target goes back to operating in I
2C mode (
OPMD =
0b00) and is ready to participate in the Dynamic
Address Assignment procedure again.
The Controller can also assign a new Dynamic Address to the Target directly using the Set
New Dynamic Address (SETNEWDA) CCC.
Important: Clearing the Dynamic
Address only switches the Target’s mode of operation from I3C SDR mode to I
2C
mode, but it does not change the buffers on SDA and SCL pads. Such a change must be made
manually. Refer to
I3C Pad Compatibility with I2C/SMBus Levels for details. The user can check
the
OPMD bits to identify when the Dynamic Address is cleared (or
assigned) and switch the buffers accordingly.