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Chapter 7 Electrical Data 37
31994A —1 August 2004 AMD Sempron™ Processor Model 10 with 256K L2 Cache Data Sheet
Table 14 shows the T
SHUTDOWN
and T
SD_DELAY
specifications
for circuitry in motherboard design necessary for thermal
protection of the processor.
7.13 APIC Pins AC and DC Characteristics
Table 15 shows the AMD Sempron processor model 10 AC and
DC characteristics of the APIC pins.
Table 14. Guidelines for Platform Thermal Protection of the Processor
Symbol Parameter Description Max Units Notes
T
SHUTDOWN
Thermal diode shutdown temperature for processor protection 125 °C 1, 2, 3
T
SD_DELAY
Maximum allowed time from T
SHUTDOWN
detection to processor shutdown
500 ms 1, 3
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 Sempron™ processor model 10 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.
Table 15. APIC Pin AC and DC Characteristics
Symbol Parameter Description Condition Min Max Units Notes
V
IH
Input High Voltage
1.7 2.625 V 1, 2
V
CC_CORE
< V
CC_CORE_MAX
| V
IH
– V
CC_CORE
| ≤ 1.60 V
V 3
V
IL
Input Low Voltage –300 700 mV 1
V
OH
Output High Voltage
2.625 V 2
V
CC_CORE
< V
CC_CORE_MAX
| V
OH
– V
CC_CORE
| ≤ 1.60 V
V 3
V
OL
Output Low Voltage –300 400 mV
I
LEAK_P
Tristate Leakage Pullup
V
IN
= VSS (Ground)
–1 mA
I
LEAK_N
Tristate Leakage
Pulldown
V
IN
= 2.5 V
1 mA
I
OL
Output Low Current
V
OL
Max
9 mA
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. Refer to “VCC_2.5V Generation Circuit” found in the section, “Motherboard Required Circuits,” of the AMD Athlon™ Processor-
Based Motherboard Design Guide, order# 24363.
4. Edge rates indicate the range for characterizing the inputs.