Intel C2518 FH8065501516710 Ficha De Dados

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

331

Based on the interaction between SUSCHKB.IRWST and certain supported and 

unsupported commands, the following recommendations are made:

• If Quick Command is unused (or if its usage is restricted to R/W# bit cleared), then 

IRWST is cleared. The hardware invalidates the unsupported commands Receive 

Byte and I

2

C Read.

• Otherwise, IRWST is set, and the firmware invalidates (drops) both of these 

unsupported commands.

0

Transaction is ACKed 

and then dropped. No 

descriptor is sent.
The hardware 

incorrectly invalidates 

a supported command 

option.

Transaction is ACKed 

and a descriptor is sent 

to ring buffer for the 

firmware.

Transaction is ACKed 

and then dropped. No 

descriptor is sent.
The hardware 

invalidates this 

unsupported 

command.

Transaction is ACKed 

and then dropped. No 

descriptor is sent.
The hardware 

invalidates this 

unsupported 

command.

1

Transaction is ACKed 

and a descriptor is sent 

to ring buffer for the 

firmware.

Transaction is ACKed 

and a descriptor is sent 

to ring buffer for the 

firmware.

Transaction is ACKed 

and a descriptor is sent 

to ring buffer for the 

firmware. 
The command is 

aliased and treated by 

the hardware as Send 

Byte.
The firmware must 

invalidate (drop) this 

unsupported command 

by detecting the R/W# 

bit is set in the 

descriptor.

Transaction is ACKed 

and a descriptor is sent 

to ring buffer for the 

firmware.
The command is 

aliased and treated by 

the hardware as I

2

C 

Write.
The firmware must 

invalidate (drop) this 

unsupported command 

by detecting the R/W# 

bit is set in the 

descriptor.