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參數(shù)資料
| 型號： | Pentium II 333 |
| 廠商： | Intel Corp. |
| 英文描述： | Processor with On-Die Cache Low-Power Module(帶片上緩存低能量模塊的處理器) |
| 中文描述： | 而對整個處理器模高速緩存低功率模塊（帶片上緩存低能量模塊的處理器） |
| 文件頁數(shù)： | 34/50頁 |
| 文件大?。?/td> | 1123K |
| 代理商： | PENTIUM II 333 |
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Pentium
II
Processor with On-Die Cache – Low-Power Module
34
Datasheet
The following list provides additional specifications and clarifications of the power sequence
timing and Figure 5 provides an illustration.
The VR_ON signal
may only be
asserted to a logical high by a digital signal
after
V_DC
≥
4.7
volts, V_5
≥
4.5 volts, and V_3
≥
3.0 volts.
The Rise Time and Fall Time of VR_ON
must
be less than or equal to
1 microsecond
when it
goes through its V
IL
to V
IH
.
VR_ON has its V
IL
(max) = +0.4 volts and V
IH
(min) = +3.0 volts.
The VR_PWRGD will get asserted to logic high (3.3 volts) after V_CORE is stabilized and
V_DC reaches 5.0 volts. This signal should not and can not be pulled up by the system
electronics.
In the power-on process, Intel recommends to raise the higher voltage power plane first
(V_DC), followed by the lower power planes (V_5, V_3), and finally assert VR_ON after
above voltage levels are met on all rails. The power-off process should be the reverse process,
i.e., VR_ON gets deasserted, followed by the lower power planes, and finally the higher power
planes.
VR_ON must monotonically rise through its V
IL
to V
IH
and fall through its V
IH
to V
IL
points.
The sign of slope can not change between V
IL
and V
IH
in rising and V
IH
and V
IL
in falling.
VR_ON must provide an instantaneous in-rush current to the module with the following
values as listed in Table 23.
VR_ON Valid-Low Time: This specifies how long VR_ON needs to be low for a valid off
before VR_ON can be turned back on again. In going from a valid on to off and then back on,
the following conditions must be met to prevent damage to the OEM system or the module:
VR_ON must be low for 1 millisecond.
The original voltage level requirements for turn-on must be met before assertion of VR_ON
(i.e., V_DC
≥
4.7 volts, V_5
≥
4.5 volts, and V_3
≥
3.0 volts).
Table 23. VR_ON In-rush Current
Instantaneous
DC Operating
MAX
41.0 mA
0.1 μA
TYP
0.2 mA
0.0 μA
NOTE:
These values are based on a 3.3V VR_ON signal.
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