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LM87 数据表(PDF) 29 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LM87
功能描述  Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing
PDF  32 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM87 数据表(HTML) 29 Page - National Semiconductor (TI)

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Functional Description (Continued)
Bit
Name
Read Only
Description
6
FAN1/AIN1
Read Only
A one indicates the fan count limit has been exceeded or an AIN1 High or Low limit has
been exceeded.
7
FAN2/AIN2
Read Only
A one indicates the fan count limit has been exceeded or an AIN2 High or Low limit has
been exceeded.
13.16 Interrupt Status Register 2 Mirror — Address 4Dh
Power on default – <7:0> = 0000 0000 binary
Bit
Name
Read Only
Description
0
+12Vin
Read Only
A one indicates a High or Low limit has been exceeded.
1
Vccp2
Read Only
A one indicates a High or Low limit has been exceeded.
2
Reserved
Read Only
3
Reserved
Read Only
4
CI
Read Only
A one indicates the CI (Chassis Intrusion) input has gone high.
5
THERM#
Read Only
A one indicates the THERM# input has been pulled low by external circuitry.
6
D1 Fault
Read Only
A one indicates the D1 inputs are shorted to Vcc or open circuit.
7
D2 Fault
Read Only
A one indicates the D2 inputs are shorted to Vcc or open circuit.
13.17 SMBALERT# Enable — Address 80h
Power on default – <7:0> = 0010 0000 binary
Bit
Name
Read/Write
Description
0
Reserved
Read Only
1
Reserved
Read Only
2
Reserved
Read Only
3
Reserved
Read Only
4
Reserved
Read Only
5
Reserved
Read Only
6
SMBALERT#
Enable
Read/Write
A one enables the SMBALERT# mode of operation.
7
Reserved
Read Only
13.18 Value RAM — Address 19h–3Fh
Address A6–A0
Description
19h
DAC data register; power on default <7:0> =1111 1111 binary
1Ah
AIN1 Low Limit
1Bh
AIN2 Low Limit
20h
+2.5V/External Temperature 2 reading
21h
Vccp1 reading
22h
+Vcc reading
23h
+5V reading
24h
+12V reading
25h
Vccp2 reading
26h
External Temperature 1 reading
27h
Internal Temperature reading
28h
FAN1/AIN1 reading
Note: For the FAN reading, this location stores the number of counts of the internal clock per
revolution.
29h
FAN2/AIN2 reading
Note: For the FAN reading, this location stores the number of counts of the internal clock per
revolution.
www.national.com
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