Intel C2518 FH8065501516710 Data Sheet

Product codes
FH8065501516710
Page of 746
Volume 2—SMBus 2.0 Unit 1 - Host—C2000 Product Family
Controller Characteristics and Operation
Intel
®
 Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
324
Order Number: 330061-002US
Table 15-19. Target Header Encodings (TSTS) Per Transaction Type (TTYPE) (Sheet 1 of 2)
TTYPE
Cycle
Type
TSTS
0000
Success
TSTS 0001
PEC Error
TSTS 
0010
Protocol Error
TSTS
0011
Hardware NACK
TSTS
0100
External 
NACK
TSTS
0101
Clock Low 
Time Out
TSTS
0110
Data Low 
Time Out
0101
GP Block 
Read
No 
errors
N/A (the 
hardware 
transmits the 
PEC)
• A collision is 
detected by the 
hardware. This 
happens when 
the hardware 
intended to drive 
NACK and saw 
an ACK on the 
bus.
• The external 
master signals 
stop/restart, 
etc. in the 
middle of a byte.
• The external 
master signals 
stop on a byte 
boundary before 
the byte count 
expired.
• The external 
master 
continues 
driving more 
clocks even after 
the hardware 
has provided all 
the bytes.
• The external 
master drives 
ACK instead of 
NACK on the 
PEC byte sent by 
the hardware.
• Bits [7:1] of the 
repeated start 
address do not 
match the GPBR 
address.
• Bit 0 of the 
repeated start 
address is 0, 
and the policy is 
to check for 1.
Command code 
byte received from 
the external master 
does not match the 
expected value.
The external 
master 
NACKs at 
least one of 
the bytes 
provided by 
the 
hardware, 
i.e., 
Byte Count, 
Data1, 
Data2, 
Data3,..., 
DataN.
The hardware 
detects the 
SMBus clock 
low time-out 
anywhere in 
the middle of 
the 
transaction 
that it is 
actively 
servicing.
The 
hardware 
detects the 
SMBus data 
low time-out 
anywhere in 
the middle of 
the 
transaction 
that it is 
actively 
servicing.