Intel C2350 FH8065401488914 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

Datasheet, Vol. 2 of 3

September 2014

332

Order Number: 330061-002US

TTYPE = 0100 and MTYPE = 1111

The host notify flow comprehends both ARP host notification and ordinary SMBus host 

notify protocols since they differ only in the content of the second received byte. If the 

firmware has declared this address to be busy (TPOLICY.HOSTBSY) then the hardware 

will ACK the address byte but NACK all subsequent bytes.

TTYPE = 0000 and MTYPE = 1000, 1001, 1010, 1011, 1100, 1101

The ARP target flow comprehends all ARP protocols, including general and directed 

flavors. The priority shown in the flowchart for decoding the command byte is 

illustrative only. All ARP-related transactions require PEC processing: for Get UDID the 

hardware must calculate and transmit the PEC; in all other protocols the hardware 

must calculate the PEC and compare that against the received PEC byte.

If the firmware has declared this address to be busy (TPOLICY.C2_BSY) then the 

hardware will ACK the address byte but NACK all subsequent bytes.

The hardware address matching after an SMBus repeated-start condition is subject to 

SUSCHKB.IRWRST; if asserted it causes the hardware to ignore the R/W# bit during 

matching. This behavior is not shown in the flowchart.

ENTER

No

Next Byte

Received

Host busy?

TPOLICY.HOSTBSY

Set

Cleared

EXIT

No

MTYPE = 

“SMBus/I2C” 

(Host Notify)

NACK

MTYPE = 

“Notify ARP 

Master”

Yes

EXIT

EXIT

Total Bytes 

Received == 3?

ACK

Yes

Command == C2h?

SMBus Stop

SMBus Stop

SMBus Stop