Apic Pins Ac And Dc Characteristics - AMD ATHLON 8 Datasheet

AMD Athlon™ XP Processor Model 8 Data Sheet
Table 18. Guidelines for Platform Thermal Protection of the Processor
Symbol
T
Thermal diode shutdown temperature for processor protection
SHUTDOWN
T Maximum allowed time from T
SD_DELAY
Notes:
1. The thermal diode is not 100% tested, it is specified by design and limited characterization.
2. The thermal diode is capable of responding to thermal events of 40°C/s or faster.
3. The AMD Athlon™ XP processor model 8 provides a thermal diode for measuring die temperature of the processor. The
processor relies on thermal circuitry on the motherboard to turn off the regulated core voltage to the processor in response to a
thermal shutdown event. Refer to AMD Athlon™ Processor-Based Motherboard Design Guide, order# 24363, for thermal
protection circuitry designs.
8.14

APIC Pins AC and DC Characteristics

Table 19. APIC Pin AC and DC Characteristics
Symbol Parameter Description
V
Input High Voltage
IH
V
Input Low Voltage
IL
V
Output High Voltage
OH
V
Output Low Voltage
OL
I
Tristate Leakage Pullup
LEAK_P
I
Tristate Leakage Pulldown
LEAK_N
I
Output Low Current
OL
T
Signal Rise Time
RISE
T
Signal Fall Time
FALL
T
Setup Time
SU
T
Hold Time
HD
C
Pin Capacitance
PIN
Notes:
1. Characterized across DC supply voltage range.
2. The 2.625-V value is equal to 2.5 V plus a maximum of five percent.
3. Edge rates indicate the range for characterizing the inputs.
44
Preliminary Information
Parameter Description
detection to processor shutdown
SHUTDOWN
Table 19 shows the AMD Athlon XP processor model 8 AC and
DC characteristics of the APIC pins.
Condition
V = VSS (Ground)
IN
V
IN
V
OL
Electrical Data
Min
1.7
–300
–300
–1
= 2.5 V
Max
9
1.0
1.0
1
1
4
25175H—March 2003
Max Units Notes
°C
125 1, 2, 3
500 ms 1, 3
Max Units Notes
2.625 V 1, 2
700 mV 1
2.625 V 2
400 mV
mA
1 mA
mA
3.0 V/ns 3
3.0 V/ns 3
ns
ns
12 pF
Chapter 8