AMD AX1800DMT3C User Guide - Page 46

AMD Athlon™ System Bus AC and DC Characteristics

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Preliminary Information AMD Athlon™ XP Processor Model 6 Data Sheet 24309E-March 2002 7.11 AMD Athlon™ System Bus AC and DC Characteristics Table 11 shows the DC characteristics of the AMD Athlon system bus used by the AMD Athlon XP processor model 6. Table 11. AMD Athlon™ System Bus DC Characteristics Symbol VREF Parameter DC Input Reference Voltage Condition Min Max Units Notes (0.5*VCC_CORE) (0.5*VCC_CORE) -50 +50 mV 1 IVREF_LEAK_P VREF Tristate Leakage Pullup VIN = VREF Nominal IVREF_LEAK_N VREF Tristate Leakage Pulldown VIN = VREF Nominal VIH Input High Voltage -100 VREF + 200 µA 100 µA VCC_CORE + 500 mV VIL VOH VOL ILEAK_P ILEAK_N Input Low Voltage Output High Voltage Output Low Voltage Tristate Leakage Pullup Tristate Leakage Pulldown -500 VREF - 200 mV IOUT = -200 µA 0.85 VCC_CORE VCC_CORE+500 mV 2 IOUT = 1 mA -500 400 mV 2 VIN = VSS (Ground) -1 mA VIN = VCC_CORE Nominal 1 mA CIN Input Pin Capacitance 4 12 pF Notes: 1. VREF is nominally set to 50% of VCC_CORE with actual values that are specific to motherboard design implementation. VREF must be created with a sufficiently accurate DC source and a sufficiently quiet AC response to adhere to the ± 50 mV specification listed above. 2. Specified at the T DI E an d V C C _ C O R E s pe ci f i ca ti o ns i n t hi s do cu m e n t. 34 Electrical Data Chapter 7

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34
Electrical Data
Chapter 7
AMD Athlon™ XP Processor Model 6 Data Sheet
24309E—March 2002
Preliminary Information
7.11
AMD Athlon™ System Bus AC and DC Characteristics
Table 11 shows the DC characteristics of the AMD Athlon
system bus used by the AMD Athlon XP processor model 6.
Table 11.
AMD Athlon™ System Bus DC Characteristics
Symbol
Parameter
Condition
Min
Max
Units
Notes
V
REF
DC Input Reference Voltage
(0.5*VCC_CORE)
–50
(0.5*VCC_CORE)
+50
mV
1
I
VREF_LEAK_P
V
REF
Tristate Leakage Pullup
V
IN
= V
REF
Nominal
–100
µ
A
I
VREF_LEAK_N
V
REF
Tristate Leakage Pulldown
V
IN
= V
REF
Nominal
100
µ
A
V
IH
Input High Voltage
V
REF
+ 200
VCC_CORE +
500
mV
V
IL
Input Low Voltage
–500
V
REF
– 200
mV
V
OH
Output High Voltage
I
OUT
= –200
µ
A
0.85 VCC_CORE
VCC_CORE+500
mV
2
V
OL
Output Low Voltage
I
OUT
= 1 mA
–500
400
mV
2
I
LEAK_P
Tristate Leakage Pullup
V
IN
= VSS (Ground)
–1
mA
I
LEAK_N
Tristate Leakage Pulldown
V
IN
= VCC_CORE
Nominal
1
mA
C
IN
Input Pin Capacitance
4
12
pF
Notes:
1.
V
REF
is nominally set to 50% of VCC_CORE with actual values that are specific to motherboard design implementation. V
REF
must be
created with a sufficiently accurate DC source and a sufficiently quiet AC response to adhere to the ± 50 mV specification listed above.
2.
Specified at the T
DIE
and VCC_CORE specifications in this document.