參數(shù)資料
型號: ADM1033ARQ-REEL
廠商: ON SEMICONDUCTOR
元件分類: 溫度/濕度傳感器
英文描述: DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2Cel, RECTANGULAR, SURFACE MOUNT
封裝: MO-137AB, QSOP-16
文件頁數(shù): 14/39頁
文件大?。?/td> 819K
代理商: ADM1033ARQ-REEL
ADM1033
Rev. 0 | Page 21 of 40
Table 16. Status Register 1 (Reg. 0x4F)
Bit No.
Name
Description
7
LH
1 = Local high temperature limit has been
exceeded.
6
LL
1 = Local low temperature limit has been
exceeded.
5
RH
1= Remote high temperature limit has
been exceeded.
4
RL
1 = Remote low temperature limit has
been exceeded.
3
RD
1 = Remote diode error; indicates an
open or short on the D1+/D1 pins.
2
Unused
Reserved.
1
Unused
Reserved.
0
Unused
Reserved.
Table 17. Status Register 2 (Reg. 0x50)
Bit No.
Name
Description
7
LT
1 = Local THERM temperature limit has
been exceeded.
6
RT
1 = Remote THERM temperature limit has
been exceeded.
5
Unused
Reserved.
4
T%
1 = THERM timer limit has been
exceeded.
3
TA
1 = One of the THERM limits has been
exceeded; and the THERM output signal
has been asserted.
2
TS
1 = THERM pin is active. Clears on a read,
if THERM is not active.
1
Res
Reserved.
0
Res
Reserved.
Table 18. Status Register 3 (Reg. 0x51)
Bit No.
Name
Description
7
FS
1= Fan has stalled.
6
FA
1= Fan ALARM speed, indicates fan is
running at alarm speed.
5
Res
Reserved.
4
Res
Reserved.
3
Res
Reserved.
2
Res
Reserved.
1
Res
Reserved.
0
ALERT
1= SMBusALERT low, indicates the
ADM1033 has pulled the SMBusALERT
line low.
ALERT INTERRUPT BEHAVIOR
The ADM1033 generates an ALERT to signal out-of-limit
conditions. Out-of-limit conditions can also be detected by
polling the status registers. The ADM1033 has two ALERT
outputs, called ALERT Comp and SMBusALERT.
In SMBusALERT mode, the output remains low until the
following combination of conditions occur: the measurement
falls back within its programmed limits, and either the status
register is read or an ARA is completed.
In ALERT Comp mode, the output automatically resets
once the temperature measurement falls back within the
programmed limits.
For the SMBusALERT output, a status bit is set when a
measurement goes outside its programmed limit. If the
corresponding mask bit is not set, the SMBusALERT output
is pulled low. If the measured value falls back within the limits,
the SMBusALERT output remains low until the corresponding
status register is read or until an ARA is completed, as long as
no other measurement is outside its limits.
On the other hand, the ALERT Comp output is automatically
pulled low when a measurement goes outside its programmed
limits. Once the measurement falls back within its limits, the
ALERT output is automatically pulled back high again,
assuming no other measurement channel is outside its limits.
The main difference between the two outputs is that the
SMBusALERT does not reset without software intervention,
while the ALERT Comp output automatically resets itself. Note:
In this data sheet, an ALERT refers to both the ALERT Comp
and SMBusALERT, unless otherwise stated.
ALERT, 70 C
TEMPERATURE
LIMITS
TIME
CLEARED
ON READ
ALERT COMP
SMBusALERT
04937-0-029
Figure 31. How ALERT Comparator and SMBusALERT Outputs Work
Rev. 1 | Page 21 of 39 | www.onsemi.com
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