Datasheet

LM87

www.ti.com

SNAS034J –APRIL 2000–REVISED MARCH 2013

Value RAM—Address 19h–3Fh

Address A6–A0 Description

19h DAC data register; power on default <7:0>=1111 1111 binary

1Ah AIN1 Low Limit

1Bh AIN2 Low Limit

20h +2.5V/External Temperature 2 reading

21h Vccp1 reading

22h +Vcc reading

23h +5V reading

24h +12V reading

25h Vccp2 reading

26h External Temperature 1 reading

27h Internal Temperature reading

28h FAN1/AIN1 reading

Note: For the FAN reading, this location stores the number of counts of the internal clock per revolution.

29h FAN2/AIN2 reading

Note: For the FAN reading, this location stores the number of counts of the internal clock per revolution.

2Ah Reserved

2Bh +2.5V High Limit/External Temperature 2 High Limit

2Ch +2.5V Low Limit/External Temperature 2 Low Limit

2Dh Vccp1 High Limit

2Eh Vccp1 Low Limit

2Fh +3.3V High Limit

30h +3.3V Low Limit

31h +5V High Limit

32h +5V Low Limit

33h +12V High Limit

34h +12V Low Limit

35h Vccp2 High Limit

36h Vccp2 Low Limit

37h External Temperature 1 High Limit

38h External Temperature 1 Low Limit

39h Internal Temperature High Limit

3Ah Internal Temperature Low Limit

FAN1Count Limit/AIN1 High Limit

3Bh

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

FAN2 Fan Count Limit/AIN2 High Limit

3Ch

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

3Dh Reserved

3Eh Company Identification. The number in this register identifies Texas Instruments LM87 (0000 0010)

3Fh Stepping Register LM87 revision number 06h(0000 0110)

Product Folder Links: LM87