LM80 National Semiconductor, LM80 Datasheet - Page 10

• Manufacturer Part Number: LM80
• Description: Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor
• Manufacturer: National Semiconductor

www.national.com
Functional Description
2.1 Internal Registers of the LM80
Configuration Register
Interrupt Status Register 1
Interrupt Status Register 2
Interrupt Mask Register 1
Interrupt Mask Register 2
Fan Divisor/RST_OUT/OS
Register
OS/ Configuration and
Temperature Resolution
Register
Value RAM
Register
TABLE 1. The internal registers and their corresponding internal LM80 address is as follows:
the Address Register)
Address (This is the
data to be written to
LM80 Internal Hex
(Continued)
20h-3Fh
00h
01h
02h
03h
04h
05h
06h
0000 1000
0000 0000
0000 0000
0000 0000
0000 0000
0001 0100
0000 0001
Power on
10
Value
FAN1 and FAN2 divisor = 2 (count of 153 =
4400 RPM)
Notes