Intel C2350 FH8065401488914 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

301

These steps cover the case when the ARP Master has exited a reset state. Since ARP 

supports hot-plug the Master must be prepared to execute the ARP at any time; step 

15 covers the case when a device issues the Notify ARP Master command. If during the 

ARP process a previously detected device is now not discovered, then the slave address 

associated with that device is removed from the Used Address Pool.

The diagram does not consider bus time-out mechanisms or retries. These are 

implemented to comply with SMBus timing requirements.

10.

The device possesses a valid slave address. However, the ARP Master 

must check this address against the Used Address Pool to ensure that 

no other device has already been assigned the same address. If the 

received Device Slave Address is found in the Used Address Pool then 

proceed to step 11. If not, then the device keeps its current slave 

address but needs acknowledgement from the ARP Master; proceed to 

step 12.

• [FW]

11.

Select a slave address that is not in the Used Address Pool and proceed 

to step 12.

• [FW]

12.

Send the Assign Address command with the UDID returned by the 

device in the Get UDID command packet.

• [FW]

13.

Check for acknowledgement of all bytes in the Assign Address 

command packet. If any byte was not acknowledged then the ARP 

Master assumes the device is no longer present; proceed to step 6 to 

determine if more devices require address resolution. If all bytes were 

acknowledged then the ARP Master assumes that the device has 

accepted the address assignment; proceed to step 14.

• [HW and FW] HW monitors slave ACK 

before sending descriptor to FW.

14.

The device now has a valid slave address. The ARP Master must add this 

address to the Used Address Pool. Proceed to step 6 to determine if 

more devices require address resolution.

• [FW]

15.

The ARP Master checks if the received packet was the Notify ARP Master 

command. If so, then it must execute the ARP to resolve the address for 

the newly added device(s); proceed to step 6. If not, then proceed to 

step 16.

• [FW]

16.

The ARP Master received a non-ARP related packet. Process it 

accordingly and proceed to step 5.

• [FW]