2.1 Internal Registers of the LM80

TABLE 1. The internal registers and their corresponding internal LM80 address is as follows:

Register

LM80 Internal Hex

Address (This is the

data to be written to

the Address Register)

Power on

Value

Notes

Configuration Register

00h

0000 1000

Interrupt Status Register 1

01h

0000 0000

Interrupt Status Register 2

02h

0000 0000

Interrupt Mask Register 1

03h

0000 0000

Interrupt Mask Register 2

04h

0000 0000

Fan Divisor/RST_OUT/OS

Register

05h

0001 0100

FAN1 and FAN2 divisor = 2 (count of 153 =

4400 RPM)

OS/ Configuration and

Temperature Resolution

Register

06h

0000 0001

Value RAM

20h-3Fh

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