MAX6618 Maxim Integrated Products, MAX6618 Datasheet - Page 10

• Manufacturer Part Number: MAX6618
• Description: PECI-to-I2C Translator
• Manufacturer: Maxim Integrated Products

Table 11. Read Temperature
Table 12. Return Temperature Values
PECI-to-I
Table 11 shows the different commands for selecting
one of the PECI hosts or getting the maximum tempera-
ture. Read commands are initiated by the MAX6618,
and the result returned is a 16-bit word with the least
significant bit (LSB) clocked in first for the selected
PECI host.
The result consists of RESLO for the 8 LSBs and RESHI
for the 8 MSBs, resulting in a 16-bit word. The 16-bit
10
TEMPERATURE (°C)
______________________________________________________________________________________
ADDRESS
RELATIVE
00h
01h
02h
03h
04h
05h
06h
07h
08h
-36
-37
-38
-39
-40
-41
-42
-43
-1
Socket 0, domain 0
Socket 0, domain 1
Socket 1, domain 0
Socket 1, domain 1
Socket 2, domain 0
Socket 2, domain 1
Socket 3, domain 0
Socket 3, domain 1
Read maximum temperature for all enabled
sockets/domains
2
Temperature Commands
C Translator
16 BITS
17C0
17C0
17C0
17C0
17C0
17C0
17C0
17C0
17C0
0000
0000
0000
0000
0000
0000
0000
0000
0000
CONFIG2 OFFSET
REGISTER
ALTERNATE
0000
005F
0000
005F
0000
005F
0000
005F
0000
005F
0000
005F
0000
005F
0000
005F
0000
005F
words are temperature values read from the PECI
interface. PECI-enabled Intel microprocessors return
temperature data in fractions of 1°C below the thermal-
control-circuit activation point, resulting in negative
return values that do not represent absolute tempera-
tures. Absolute temperatures can be achieved by set-
ting the temperature offset in CONFIG2.
Table 12 shows example return values for an Intel CPU.
Note that the MAX6618 does not interpret the return
ReadWord
TYPE
16 BITS
0DC0
FFC0
F6C0
F5C0
0D80
0D40
0D00
0E80
0E40
0E00
1780
F700
0ec0
F680
F640
F600
F580
F540
RESHI:RESLO RESULT
16-bit words
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RESULT
ALTERNATE
FFDC
FFDB
FFDA
FFD9
FFD8
FFD7
FFD6
FFD5
005E
003B
003A
FFFF
0039
0038
0037
0036
0035
0034