參數(shù)資料
型號(hào)： pentium II
廠商： Intel Corp.
英文描述： pentium II processor With On-die Cache Mobile Module Connector 1 (MMC-1)(帶緩存和連接器1的奔II處理器)
中文描述： 奔騰II處理器芯片上緩存手機(jī)模塊連接器1（MMC管理- 1）（帶緩存和連接器1的奔二處理器）
文件頁(yè)數(shù)： 34/34頁(yè)
文件大?。?/td> 582K
代理商： PENTIUM II
34
Intel
a
Pentium
a
II Processor With On-die Cache Mobile Module MMC-1
4.7.4.3
Overvoltage Lockout: Circuit Description
(V_ov_lockout)
The Pentium II processor with on-die cache mobile module
MMC-1is specified to operate with a maximum input voltage
of 21 volts. This circuit locks out the input voltage if it
exceeds the maximum 21 volts. The output of this circuit, Pin
14 of the LM339 comparator, is an open collector output. It is
low when the applied voltage at PWR is more than 21 volts.
This voltage can be calculated with the following equation:
V_ov_lockout
.
.
Vref
R26
R26
R27
1
R24
R23
=
V_ov_lockout
20.998 volt
4.7.4.4
Figure 8 shows that the circuit detects an overcurrent
condition and cuts off the input voltage applied to the
Pentium II processor with on-die cache mobile module. This
circuit has two different current limit trip points. This takes
into account the different maximum current drain by the
Celeron processor mobile module at different input voltages.
Overcurrent Protection: Circuit Description
Assuming the AC Adaptor voltage is 18 volts and the battery
is a 3x3 Li-Ion configuration with a minimum of 7.5 volts, the
maximum current for the above circuit can be calculated
using the following expression:
With AC Adaptor (I_wAdaptor):
I_wAdaptor
.
Vref
Vbe_Q1
R14
R13
R1
I_wAdaptor = 0.989
amp
Without AC Adaptor (I_woAdaptor):
I_woAdaptor
.
Vref
Vbe_Q1
R1.
R14
R33
R13
R1
I_woAdaptor = 2.375
amp
4.8
Active Thermal Feedback
Table 22 identifies the addresses allocated for the SMBus
thermal sensor.
Table 22. Thermal Sensor SMBus Address Table
Function
SMBus Address
Thermal Sensor
1001 110
NOTE:
The thermal sensor used is compliant with SMBus addressing. Please refer to the
Pentium II processor Thermal Sensor
Interface Specification
.
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