Electrical Specifications
104
Datasheet, Volume 1
7.10.2
PECI DC Characteristics
The PECI interface operates at a nominal voltage set by V
CCIO
The set of DC electrical
specifications shown in
are used with devices normally operating from a
V
CCIO
interface supply. V
CCIO
nominal levels will vary between processor families. All
PECI devices will operate at the V
CCIO
level determined by the processor installed in the
system. For specific nominal V
CCIO
levels, refer to
.
Notes:
1.
V
CCIO
supplies the PECI interface. PECI behavior does not affect V
CCIO
min/max specifications.
2.
The leakage specification applies to powered devices on the PECI bus.
3.
The PECI buffer internal pull up resistance measured at 0.75*V
CCIO
Figure 7-1. Example for PECI Host-clients Connection
Table 7-15. PECI DC Electrical Limits
Symbol
Definition and Conditions
Min
Max
Units
Notes
1
Rup
Internal pull up resistance
15
45
Ohm
3
V
in
Input Voltage Range
-0.15
V
CCIO
V
V
hysteresis
Hysteresis
0.1 * V
CCIO
N/A
V
V
n
Negative-Edge Threshold Voltage
0.275 * V
CCIO
0.500 * V
CCIO
V
V
p
Positive-Edge Threshold Voltage
0.550 * V
CCIO
0.725 * V
CCIO
V
C
bus
Bus Capacitance per Node
N/A
10
pF
Cpad
Pad Capacitance
0.7
1.8
pF
Ileak000
leakage current @ 0V
—
0.6
mA
2
Ileak025
leakage current @ 0.25*V
CCIO
—
0.4
mA
2
Ileak050
leakage current @ 0.50*V
CCIO
—
0.2
mA
2
Ileak075
leakage current @ 0.75*V
CCIO
—
0.13
mA
2
Ileak100
leakage current @ V
CCIO
—
0.10
mA
2