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/de-
asserted for at least four BCLKs 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 11.
GTL+ Signal Group DC Specifications
Symbol
Parameter
Min
Max
Unit Notes1
VIL
VIH
VOH
Input Low Voltage
Input High Voltage
Output High Voltage
-0.10
GTLREF – 0.10
VTT + 0.10
VTT
V
V
V
2, 5
3, 4, 5
4, 5
GTLREF + 0.10
VTT – 0.10
VTT_MAX
[(RTT_MIN)+(RON_MIN)]
/
IOL
Output Low Current
N/A
A
-
ILI
ILO
Input Leakage Current
Output Leakage Current
Buffer On Resistance
N/A
N/A
10
± 100
± 100
13
µA
µA
Ω
6
7
RON
NOTES:
1.
2.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
IL is defined as the voltage range at a receiving agent that will be interpreted as a logical
low value.
IH is defined as the voltage range at a receiving agent that will be interpreted as a logical
high value.
IH and VOH may experience excursions above VTT. However, input signal drivers must
V
3.
4.
V
V
comply with the signal quality specifications.
The VTT referred to in these specifications is the instantaneous VTT.
Leakage to VSS with land held at VTT.
5.
6.
7.
Leakage to VTT with land held at 300 mV.
Table 12.
Open Drain and TAP Output Signal Group DC Specifications
Symbol
Parameter
Output Low Voltage
Min
Max
Unit Notes1
VOL
IOL
ILO
0
0.20
50
V
-
2
3
Output Low Current
16
mA
µA
Output Leakage Current
N/A
± 200
NOTES:
1.
2.
3.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
Measured at VTT * 0.2.
For Vin between 0 and VOH
Datasheet
25
INTEL [ INTEL ]
