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Functional Description (Continued)

12.10 Value RAM — Address 20h–3Fh

Address A7–A0 Description

20h IN0 reading

21h IN1 reading

22h IN2 reading

23h IN3 reading

24h IN4 reading

25h IN5 reading

26h IN6 reading

27h Temperature reading

28h FAN1 reading

Note: This location stores the number of counts of the internal clock per revolution.

29h FAN2 reading

Note: This location stores the number of counts of the internal clock per revolution.

2Ah IN0 High Limit

2Bh IN0 Low Limit

2Ch IN1 High Limit

2Dh IN1 Low Limit

2Eh IN2 High Limit

2Fh IN2 Low Limit

30h IN3 High Limit

31h IN3 Low Limit

32h IN4 High Limit

33h IN4 Low Limit

34h IN5 High Limit

35h IN5 Low Limit

36h IN6 High Limit

37h IN6 Low Limit

38h Hot Temperature Limit (High)

39h Hot Temperature Hysteresis Limit (Low)

3Ah OS Temperature Limit (High)

3Bh OS Temperature Hysteresis Limit (Low)

3Ch FAN1 Fan Count Limit

Note: It is the number of counts of the internal clock for the Low Limit of the fan speed.

3Dh FAN2 Fan Count Limit

Note: It is the number of counts of the internal clock for the Low Limit of the fan speed.

3Eh-3Fh Reserved

Note: Setting all ones to the high limits for voltages and fans (0111 1111 binary for temperature) means interrupts will never be generated except the case when

voltages go below the low limits.

For voltage input high limits, the device is doing a greater than comparison. For low limits, however, it is doing a less than or equal to comparison.

LM80