User Manual

Electrical Specifications
58 Datasheet
5.6.2.2 PECI DC Specifications
5.6.2.3 System Reference Clock (BCLK{0/1}) DC Specifications
Table 5-15. PECI DC Specifications
Symbol Definition and Conditions Min Max Units Figure Notes
1
V
In
Input Voltage Range -0.150 V
CCPECI
+ 0.150 V
V
Hysteresis
Hysteresis 0.100 * V
CCPECI
–V
V
N
Negative-edge threshold
voltage
0.275 * V
CCPECI
0.500 * V
CCPECI
V 5-1 2
V
P
Positive-edge threshold
voltage
0.550 * V
CCPECI
0.725 * V
CCPECI
V 5-1 2
I
Source
Pullup Resistance (V
OH
=
0.75 * V
CCPECI
)
-6.00 – mA
I
Leak+
High impedance state
leakage to V
CCIO_IN
(V
leak
=
V
OL
)
50 200 µA
R
ON
High impedance leakage to
GND (V
leak
= V
OH
)
20 36 
C
Bus
Bus capacitance per node N/A 10 pF 4, 5
V
Noise
Signal noise immunity above
300 MHz
0.100 * V
CCPECI
N/A V
p-p
Output Edge Rate (50 ohm to
V
SS
, between V
IL
and V
IH
)
1.5 4 V/ns
Notes:
1. V
CCPECI
supplies the PECI interface. PECI behavior does not affect V
CCPECI
min/max specification.
2. It is expected that the PECI driver will take into account, the variance in the receiver input thresholds and
consequently, be able to drive its output within safe limits (-0.150 V to 0.275*V
CCPECI
for the low level
and 0.725*V
CCPEC
to V
CCPECI
+0.150 V for the high level).
3. The leakage specification applies to powered devices on the PECI bus.
4. One node is counted for each client and one node for the system host. Extended trace lengths might
appear as additional nodes.
5. Excessive capacitive loading on the PECI line may slow down the signal rise/fall times and consequently
limit the maximum bit rate at which the interface can operate.
Table 5-16. System Reference Clock (BCLK{0/1}) DC Specifications (Sheet 1 of 2)
Symbol Parameter Signal Min Max Unit Figure Notes
1
V
BCLK_diff_ih
Differential Input High
Voltage
Differential
0.150 N/A V 5-6 9
V
BCLK_diff_il
Differential Input Low
Voltage
Differential
– -0.150 V 5-6 9
V
cross
(abs)
Absolute Crossing Point Single Ended
0.250 0.550 V 5-7, 5-8
2, 4, 7,
9
V
cross
(rel)
Relative Crossing Point Single Ended 0.250 + 0.5*
(VH
avg
– 0.700)
0.550 + 0.5*
(VH
avg
– 0.700)
V 5-7
3, 4, 5,
9
V
cross
Range of Crossing Points Single Ended N/A 0.140 V 5-9 6, 9
V
TH
Threshold Voltage Single Ended Vcross – 0.1 Vcross + 0.1 V 9