LM81BIMT-3/NOPB National Semiconductor, LM81BIMT-3/NOPB Datasheet - Page 25

• Manufacturer Part Number: LM81BIMT-3/NOPB
• Description: IC MONITOR SYS HARDWARE 24TSSOP
• Manufacturer: National Semiconductor

Specifications of LM81BIMT-3/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: SMBus™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.8 V ~ 3.8 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Monitored Voltage: 2.5 V , 3.3 V , 5 V , 12 V
• Manual Reset: Not Resettable
• Watchdog: Watchdog
• Battery Backup Switching: No
• Supply Voltage (max): 3.8 V
• Supply Voltage (min): 2.8 V
• Supply Current (typ): 400 uA (Typ)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM81BIMT-3; *LM81BIMT-3/NOPB; LM81BIMT-3

7-0
Bit
Configuration Register
Interrupt Status Register 1
Interrupt Status Register 2
Interrupt Mask Register 1
Interrupt Mask Register 2
CI Clear Register
VID/Fan Divisor Register
Serial Bus Address Register
VID4 Register
Temperature Configuration
Register
Extended Mode Register 1
Extended Mode Register 2
Value RAM
Company ID
Stepping
Functional Description
13.0 REGISTERS AND RAM
13.1 Address Register
The main register is the ADDRESS Register. The bit designations are as follows:
13.2 Address Pointer Index (A7–A0)
Bit 7
Registers and RAM
A7
Address
Pointer
Name
Bit 6
A6
Write
Read/
Write
40h
41h
42h
43h
44h
46h
47h
48h
49h
4Bh
4Ch
4Dh
19h–3Dh
3Eh
3Fh
A6–A0 in
Bit 5
Hex
A5
(Continued)
Address of RAM and Registers. See the tables below for detail.
Address Pointer (Power On default 00h)
0000 1000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0001
0100 0100
0000 0000
0000 0001
0000 0011
<
<
<
=(A1)(A0)
<
<
7:4
3:0
7:2
7:1
0
>
Bit 4
A4
Power On Value of
=VID4
>
>
>
>
<
= 0101;
= VID3–VID0
=0010 11;
=1000 000;
7:0
Registers:
>
25
in Binary
<
Bit 3
1:0
A3
>
Description
Address 19h default=1111 1111
This default designates National
Semiconductor.
Revisions of this device will start with 1 and
increment by one.
Bit 2
A2
Bit 1
Notes
A1
www.national.com
Bit 0
A0