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參數(shù)資料
| 型號： | BX805499030 |
| 廠商： | INTEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 64-BIT, 1600 MHz, MICROPROCESSOR, CPGA611 |
| 封裝： | PGA-611 |
| 文件頁數(shù)： | 97/108頁 |
| 文件大?。?/td> | 2315K |
| 代理商： | BX805499030 |
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Dual-Core Intel Itanium Processor 9000 Series Datasheet
89
System Management Feature Specifications
6.7.2
Thermal Limit Registers
The thermal sensing device has two thermal limit registers; they define high and low
limits for the processor core thermal diode. The encoding for these registers is the
same as for the thermal reference registers. If the diode thermal value equals or
exceeds one of its limits, then its alarm bit in the status register is triggered. This
indication is also brought out to the processor system bus via the THRMALERT# signal.
6.7.3
Status Register
The status register shown in Table 6-14 indicates which (if any) of the thermal value
thresholds have been exceeded. It also indicates if a conversion is in progress or if an
open circuit has been detected in the processor core thermal diode connection. Once
set, alarm bits stay set until they are cleared by a status register read. A successful
read to the status register will clear any alarm bits that may have been set, unless the
alarm condition persists. Note that the THRMALERT# interrupt signal is latched and is
not automatically cleared when the status flag bit is cleared. The latch is cleared by
sending the Alert Response Address (0001100) on the SMBus.
6.7.4
Configuration Register
The configuration register controls the operating mode (standby vs. auto-convert) of
the thermal sensing device. Table 6-15 shows the format of the configuration register.
If the RUN/STOP bit is set (high) then the thermal sensing device immediately stops
converting and enters standby mode. The thermal sensing device will still perform
analog-to-digital conversions in standby mode when it receives a one-shot command.
If the RUN/STOP bit is clear (low) then the thermal sensor enters auto-conversion
mode. The thermal sensing device starts operating in free running mode, auto-
converting at 0.25 Hz after power-up.
Table 6-14. Thermal Sensing Device Status Register
Bit
Name
Function
7 (MSB)
BUSY
A one indicates that the device’s analog to digital converter is busy converting.
6
RESERVED
Reserved for future use.
5
RESERVED
Reserved for future use.
4
RHIGH
A one indicates that the processor core thermal diode high temperature alarm has
been activated.
3
RLOW
A one indicates that the processor core thermal diode low temperature alarm has
been activated.
2
OPEN
A one indicates an open fault in the connection to the processor core diode.
1
RESERVED
Reserved for future use.
0 (LSB)
RESERVED
Reserved for future use.
Table 6-15. Thermal Sensing Device Configuration Register
Bit
Name
Reset
State
Function
7 (MSB)
RESERVED
0
Reserved for future use.
6
RUN/STOP
0
Standby mode control bit. If high, the device immediately stops
converting, and enters standby mode. If low, the device converts in
either one-shot or timer mode.
5–0
RESERVED
0
Reserved for future use.
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