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LM81 Datasheet(PDF) 27 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM81
Description  Serial Interface ACPI-Compatible Microprocessor System
PDF  32 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM81 Datasheet(HTML) 27 Page - National Semiconductor (TI)

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Functional Description (Continued)
13.7 Interrupt Mask Register 2 — Address 44h
Power on default – <7:0> = 0000 0000 binary
Bit
Name
Read/
Write
Description
0
+12Vin
Read/Write
A one disables the corresponding interrupt status bit for INT interrupt.
1
Vccp2
Read/Write
A one disables the corresponding interrupt status bit for INT interrupt.
2
Reserved
Read/Write
3
Reserved
Read/Write
4
Chassis Intrusion
Read/Write
A one disables the corresponding interrupt status bit for INT interrupt.
5
Reserved
Read/Write
6
Reserved
Read/Write
7
RESET Enable
Read/Write
<7> = 1 in INT Mask Register 2 enables the RESET in the Configuration Register.
13.8 Reserved Register — Address 45h
Power on default – <7:0> = 00h. Read/Write for backwards compatibility.
13.9 CI Clear Register — Address 46h
Power on default – <7:0> = 0000 0000 binary
Bit
Name
Read/
Write
Description
0-6
Reserved
Read/Write
7
CI Clear
Read/Write
A one outputs a minimum 20 ms active low pulse on the Chassis Intrusion pin. The
register bit self clears after the pulse has been output. This bit is mirrored in
Configuration Register bit 6.
www.national.com
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