LM87CIMT/NOPB National Semiconductor, LM87CIMT/NOPB Datasheet - Page 24

• Manufacturer Part Number: LM87CIMT/NOPB
• Description: IC INTERFACE SER MONITOR 24TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM87CIMT/NOPB

• Function: Hardware Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Speed Control, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.8 V ~ 3.8 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM87CIMT; *LM87CIMT/NOPB; LM87CIMT

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Internal Temp. Hardware High
Limit
External Temp. Hardware High
Limit
Test Register
Channel Mode Register
Internal Temp. Hardware High
Limit
External Temp. Hardware High
Limit
Value RAM
Company ID
Revision
Configuration Register 1
Interrupt Status Register 1
Interrupt Status Register 2
Interrupt Mask Register 1
Interrupt Mask Register 2
CI Clear Register
VID0-3/Fan Divisor
Register
VID4 Register
Configuration Register 2
Interrupt Status Register 1 Mirror 4Ch
Interrupt Status Register 2 Mirror 4Dh
SMBALERT# Enable
Bit
7-0 Address Pointer
13.0 REGISTERS AND RAM
13.1 Address Pointer Register
The main register is the Address Pointer Register. The bit
designations are as follows:
13.2 Address Pointer Index (A7–A0)
Bit 7
Registers and RAM
A7
Name
Bit 6
A6
Write
Read/Write
A6–A0 in Hex Power On Value of Registers:
13h
14h
15h
16h
17h
18h
19h–3Dh
3Eh
3Fh
40h
41h
42h
43h
44h
46h
47h
49h
4Ah
80h
Address of RAM and Registers. See the tables below for detail.
Bit 5
A5
Address Pointer (Power On default 00h)
0100 0110
0101 0101
0000 0000
0000 0000
0100 0110
0101 0101
0000 0010
0000 0110
0000 1000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
<7:4> = 0101;
<3:0> = VID3–VID0
<7:1> =1000 000; <0>=VID4
0000 0000
0000 0000
0000 0000
0010 0000
Bit 4
A4
<7:0> in Binary
24
Bit 3
A3
Description
70 °C Default - <7:0>=0100 0110 - User
adjustable. Lockable by setting bit 1 of register
4Ah.
85 °C Default - <7:0>=0101 0101 - User
adjustable. Lockable by setting bit 2 of register
4Ah.
Always set to 00h
70 °C Default - <7:0>=0100 0110 - User
adjustable
85 °C Default - <7:0>=0101 0101 - User
adjustable
See Section 13.18 for details. Address 19h
default=1111 1111
This designates the National Semiconductor
LM87.
Revisions of this device will start with 1 and
increment by one.
Bit 2
A2
Notes
Bit 1
A1
Bit 0
A0