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參數(shù)資料
| 型號： | LM64 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 【1∑C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIO’s |
| 中文描述： | 【1ΣC遠(yuǎn)程二極管溫度傳感器，PWM風(fēng)扇控制和5個(gè)GPIO的 |
| 文件頁數(shù)： | 23/29頁 |
| 文件大?。?/td> | 363K |
| 代理商： | LM64 |
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2.0 LM64 Registers
ALERT Status And Mask Registers
(Continued)
ADDRESS
Hex
02
HEX
ALERT STATUS REGISTER (8-bits) (All Alarms are latched until read, then cleared if alarm condition was removed
at the time of the read.)
When this bit is a 0, the ADC is not converting.
When this bit is set to a 1, the ADC is performing a conversion. This bit
does not affect ALERT status.
When this bit is a 0, the internal temperature of the LM64 is at or below
the Local High Setpoint.
When this bit is a 1, the internal temperature of the LM64 is above the
Local High Setpoint, and an ALERT is triggered.
5
0
This bit is unused and always read as 0.
When this bit is a 0, the temperature of the Remote Diode is at or below
the Remote High Setpoint.
When this bit is a 1, the temperature of the Remote Diode is above the
Remote High Setpoint, and an ALERT is triggered.
When this bit is a 0, the temperature of the Remote Diode is at or above
the Remote Low Setpoint.
When this bit is a 1, the temperature of the Remote Diode is below the
Remote Low Setpoint, and an ALERT is triggered.
When this bit is a 0, the Remote Diode appears to be correctly
connected.
When this bit is a 1, the Remote Diode may be disconnected or shorted.
This Alarm does not trigger an ALERT.
When this bit is a 0, the temperature of the Remote Diode is at or below
the T_CRIT Limit.
When this bit is a 1, the temperature of the Remote Diode is above the
T_CRIT Limit, and an ALERT is triggered.
When this bit is a 0, the Tachometer count is lower than or equal to the
Tachometer Limit (the RPM of the fan is greater than or equal to the
minimum desired RPM).
When this bit is a 1, the Tachometer count is higher than the
Tachometer Limit (the RPM of the fan is less than the minimum desired
RPM), and an ALERT is triggered.
16
HEX
ALERT MASK REGISTER (8-bits)
7
1
This bit is unused and always read as 1.
Local High
Alarm Mask
When this bit is a 1, a Local High Alarm will not generate an ALERT
5
1
This bit is unused and always read as 1.
When this bit is a 0, Remote High Alarm event will generate an ALERT.
When this bit is a 1, a Remote High Alarm event will not generate an
ALERT.
When this bit is a 0, a Remote Low Alarm event will generate an
ALERT.
When this bit is a 1, a Remote Low Alarm event will not generate an
ALERT.
2
1
This bit is unused and always read as 1.
Remote
T_CRIT
Alarm Mask
ALERT.
Tach
Alarm Mask
When this bit is a 1, a Tach Alarm event will not generate an ALERT.
Read/
Write
Bits
POR
Value
Name
Description
0x02
Read
Only
7
0
Busy
6
0
Local
High Alarm
4
0
Remote
High Alarm
3
0
Remote
Low Alarm
2
0
Remote Diode
Fault Alarm
1
0
Remote
T_CRIT Alarm
0
0
Tach Alarm
16
R/W
6
0
When this bit is a 0, a Local High Alarm event will generate an ALERT.
4
0
Remote
High Alarm Mask
3
0
Remote
Low Alarm
Mask
1
0
When this bit is a 0, a Remote T_CRIT event will generate an ALERT.
When this bit is a 1, a Remote T_CRIT event will not generate an
0
0
When this bit is a 0, a Tach Alarm event will generate an ALERT.
L
www.national.com
23
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