Справочник Пользователя для AMD LX 900@1.5W
34
AMD Geode™ LX Processors Data Book
33234H
TDP
AL17
A
Analog
N/A
Thermal Diode Positive (TDP). TDP is the positive
terminal of the thermal diode on the die. The diode is
used to do thermal characterization of the device in
a system. This signal works in conjunction with TDN.
terminal of the thermal diode on the die. The diode is
used to do thermal characterization of the device in
a system. This signal works in conjunction with TDN.
For accurate die temperature measurements, a dual
current source remote sensor, such as the National
Semiconductor LM82, should be used. Single cur-
rent source sensors may not yield the desired level
of accuracy.
current source remote sensor, such as the National
Semiconductor LM82, should be used. Single cur-
rent source sensors may not yield the desired level
of accuracy.
If reading the CPU temperature is required while the
system is off, then a small bias (<0.25V) on V
system is off, then a small bias (<0.25V) on V
IO
is
required for the thermal diode to operate properly.
TDN
AK17
A
Analog
N/A
Thermal Diode Negative (TDN). TDN is the nega-
tive terminal of the thermal diode on the die. The
diode is used to do thermal characterization of the
device in a system. This signal works in conjunction
with TDP.
tive terminal of the thermal diode on the die. The
diode is used to do thermal characterization of the
device in a system. This signal works in conjunction
with TDP.
For accurate die temperature measurements, a dual
current source remote sensor, such as the National
Semiconductor LM82, should be used. Single cur-
rent source sensors may not yield the desired level
of accuracy.
current source remote sensor, such as the National
Semiconductor LM82, should be used. Single cur-
rent source sensors may not yield the desired level
of accuracy.
If reading the CPU temperature is required while the
system is off, then a small bias (<0.25V) on V
system is off, then a small bias (<0.25V) on V
IO
is
required for the thermal diode to operate properly.
3.4.1
System Interface Signals (Continued)
Signal Name
Ball
No.
Type
f
V
Description
3.4.2
PLL Interface Signals
Signal Name
Ball
No.
Type
f
V
Description
CAV
DD
W31
APWR
Analog
3.3
Core PLL Analog Power. Connect to 3.3V.
CAV
SS
W30
APWR
Analog
0
Core PLL Analog Ground. Connect to ground.
MAV
DD
V31
APWR
Analog
3.3
GLIU PLL Analog Power. Connect to 3.3V.
MAV
SS
V30
APWR
Analog
0
GLIU PLL Analog Ground. Connect to ground.
VAV
DD
AA1
APWR
Analog
3.3
Video PLL Analog Power. Connect to 3.3V.
VAV
SS
AA2
APWR
Analog
0
Video PLL Analog Ground. Connect to ground.
CLPF
W29
A
Analog
N/A
Core PLL Low Pass Filter. 220 pF to CAV
SS
.
MLPF
V29
A
Analog
N/A
GLIU PLL Low Pass Filter. 220 pF to MAV
SS.
VLPF
AA3
A
Analog
N/A
Video PLL Low Pass Filter. 220 pF to VAV
SS.