Address A6–A0

Address A6–A0 with

Auto-Increment

Description

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

revolution.

29h

69h

FAN2 reading

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

revolution.

2Ah

6Ah

FAN3 reading

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

revolution.

2Bh

6Bh

IN0 High Limit

2Ch

6Ch

IN0 Low Limit

2Dh

6Dh

IN1 High Limit

2Eh

6Eh

IN1 Low Limit

2Fh

6Fh

IN2 High Limit

30h

70h

IN2 Low Limit

31h

71h

IN3 High Limit

32h

72h

IN3 Low Limit

33h

73h

IN4 High Limit

34h

74h

IN4 Low Limit

35h

75h

-IN5 High Limit

36h

76h

-IN5 Low Limit

37h

77h

-IN6 High Limit

38h

78h

-IN6 Low Limit

39h

79h

Over Temperature Limit (High)

3Ah

7Ah

Temperature Hysteresis Limit (Low)

3Bh

7Bh

FAN1 Fan Count Limit

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

the fan speed.

3Ch

7Ch

FAN2 Fan Count Limit

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

the fan speed.

3Dh

7Dh

FAN3 Fan Count Limit

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

the fan speed.

3E–3Fh

7E–7Fh

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.

www.national.com

29