Intel Q9400S Data Sheet - Page 28

CMOS and Open Drain Signals, Processor DC Specifications

Page 28 highlights

Electrical Specifications 2.7.2 CMOS and Open Drain Signals Legacy input signals such as A20M#, IGNNE#, INIT#, SMI#, and STPCLK# use CMOS input buffers. All of the CMOS and Open Drain signals are required to be asserted/ deasserted for at least eight BCLKs in order for the processor to recognize the proper signal state. See Section 2.7.3 for the DC specifications. See Section 6.2 for additional timing requirements for entering and leaving the low power states. 2.7.3 Processor DC Specifications The processor DC specifications in this section are defined at the processor core (pads) unless otherwise stated. All specifications apply to all frequencies and cache sizes unless otherwise stated. Table 2-9. GTL+ Signal Group DC Specifications Symbol Parameter Min Max Unit Notes1 VIL VIH VOH IOL ILI ILO RON Input Low Voltage -0.10 GTLREF - 0.10 V Input High Voltage GTLREF + 0.10 VTT + 0.10 V Output High Voltage VTT - 0.10 VTT V Output Low Current N/A VTT_MAX / [(RTT_MIN) + (2 * RON_MIN)] A Input Leakage Current N/A ± 100 µA Output Leakage Current N/A ± 100 µA Buffer On Resistance 7.5 11 Ω 2, 5 3, 4, 5 4, 5 - 6 7 NOTES: 1. Unless otherwise noted, all specifications in this table apply to all processor frequencies. 2. VIL is defined as the voltage range at a receiving agent that will be interpreted as a logical low value. 3. VIH is defined as the voltage range at a receiving agent that will be interpreted as a logical high value. 4. VIH and VOH may experience excursions above VTT. 5. The VTT referred to in these specifications is the instantaneous VTT. 6. Leakage to VSS with land held at VTT. 7. Leakage to VTT with land held at 300 mV. Table 2-10. Open Drain and TAP Output Signal Group DC Specifications Symbol Parameter Min Max VOL Output Low Voltage IOL Output Low Current ILO Output Leakage Current 0 0.20 16 50 N/A ± 200 Unit Notes1 V - mA 2 µA 3 NOTES: 1. Unless otherwise noted, all specifications in this table apply to all processor frequencies. 2. Measured at VTT * 0.2V. 3. For Vin between 0 and VOH. 28 Datasheet

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Electrical Specifications
28
Datasheet
2.7.2
CMOS and Open Drain Signals
Legacy input signals such as A20M#, IGNNE#, INIT#, SMI#, and STPCLK# use CMOS
input buffers. All of the CMOS and Open Drain signals are required to be asserted/
deasserted for at least eight BCLKs in order for the processor to recognize the proper
signal state. See
Section 2.7.3
for the DC specifications. See
Section 6.2
for additional
timing requirements for entering and leaving the low power states.
2.7.3
Processor DC Specifications
The processor DC specifications in this section are defined at the processor core (pads)
unless otherwise stated. All specifications apply to all frequencies and cache sizes
unless otherwise stated.
NOTES:
1.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2.
V
IL
is defined as the voltage range at a receiving agent that will be interpreted as a logical
low value.
3.
V
IH
is defined as the voltage range at a receiving agent that will be interpreted as a logical
high value.
4.
V
IH
and V
OH
may experience excursions above V
TT
.
5.
The V
TT
referred to in these specifications is the instantaneous V
TT
.
6.
Leakage to V
SS
with land held at V
TT
.
7.
Leakage to V
TT
with land held at 300 mV.
NOTES:
1.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2.
Measured at V
TT
* 0.2V.
3.
For Vin between 0 and V
OH
.
Table 2-9.
GTL+ Signal Group DC Specifications
Symbol
Parameter
Min
Max
Unit
Notes
1
V
IL
Input Low Voltage
-0.10
GTLREF – 0.10
V
2, 5
V
IH
Input High Voltage
GTLREF + 0.10
V
TT
+ 0.10
V
3, 4, 5
V
OH
Output High Voltage
V
TT
– 0.10
V
TT
V
4, 5
I
OL
Output Low Current
N/A
V
TT_MAX
/
[(R
TT_MIN
) + (2 * R
ON_MIN
)]
A
-
I
LI
Input Leakage
Current
N/A
± 100
μA
6
I
LO
Output Leakage
Current
N/A
± 100
μA
7
R
ON
Buffer On Resistance
7.5
11
Ω
Table 2-10.
Open Drain and TAP Output Signal Group DC Specifications
Symbol
Parameter
Min
Max
Unit
Notes
1
V
OL
Output Low Voltage
0
0.20
V
-
I
OL
Output Low Current
16
50
mA
2
I
LO
Output Leakage Current
N/A
± 200
μA
3