LM40CIMT/NOPB National Semiconductor, LM40CIMT/NOPB Datasheet - Page 23

• Manufacturer Part Number: LM40CIMT/NOPB
• Description: IC HARDWARE MONITOR 14-TSSOP
• Manufacturer: National Semiconductor

Specifications of LM40CIMT/NOPB

• Applications: Monitors
• Interface: 1-Wire
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 14-TSSOP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM40CIMT; *LM40CIMT/NOPB; LM40CIMT

010 010
2.0 Register Set
2.10.4 Voltage Control (Addr: 010 010; 12h)
This register is set to the reset value by a Device Reset.
2.11 CONVERSION RATE (Addr: 100 000; 20h)
Reg Add
Reg
Add
100 000
Sensor
Number
(SNUM)
0
1
2
3
4
15-11
10-7
Bit
4-0
Bit
1-0
5
6
Register
Name
Voltage
Control
Type
Type
R/W ATE (Attention Enable). When set, this bit enables an Attention Request signal to be generated by the
R/W EN0 (Enable Sensor 0). When this bit is set, the Voltage Sensor 0 is enabled for voltage measurements.
R/W EN1-EN4 (Enable Sensor 1-4). Same as EN0 for Voltage sensors 1-4.
RO
RO
RO
Register Name
Conversion Rate
Low Rate Function This function is not supported by the LM40 and therefore this field is read only.
LM40, if one or more EN0-EN4 bits of this register are set.
0: Attention Request disabled (from enabled Temperature Sensor- default)
1: Attention Request enabled
0: Voltage Sensor disabled (default)
1: Voltage Sensor enabled
0: Voltage Sensor disabled (default)
1: Voltage Sensor enabled
Reserved. Will always read "0".
CR0 and CR1 (Conversion Rate bits 0 and 1) These bits control the conversion rate of the LM40 for
more details see Table Conversion Rate Control and desciption below.
Voltage Input
+2.5V
+1.2V
+3.3V_SBY
(V+)
+5V
+12V
R/
R/
W
W
1Fh
Val
(Continued)
O
P
R
Input Voltage
for Nominal
Reading
(code 384 or
180h)
2.5V
1.2V
3.3V
5V
12V
MSb
Bit
15
0
R/
R/
W
W
Bit
14
0
Reserved
Val
2h
O
P
R
Analog Input Voltage Mapping
Bit
13
Maximum
Input Voltage
(code 510.5)
3.32V to 6V
1.6V to 6V
4.39V to 6V
6.65V
15.95V to 16V 1FFh
0
Bit
12
0
Bit 7
0
Bit
11
0
23
Register
Reading at
Maximum
Voltage
1FFh
1FFh
1FFh
1FFh
EN4 EN3 EN2 EN1 EN0 ATE
Description
Description
Bit 6
Bit
10
0
Bit
9
Bit 5
0
Reserved
Bit
8
Minimum
Input Voltage
-0.5V to
3.26mV
-0.5V to
2.63mV
3.0V
-0.5V to
6.51mV
-0.5V to
15.63mV
Bit
Bit 4
7
0
Bit
6
Bit 3
Bit
0
Register
Reading at
Minimum
Voltage
00h
00h
15Dh
00h
00h
5
Bit
4
1
Bit 2
0
Low Rate Function
Bit
3
1
(Read Only)
Resolution
6.51mV
5.86mV
8.59mV
13.02mV
31.25mV
Bit 1
CR1
Bit
2
1
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Bit
1
1
Bit 0
CR0
LSb
LSb
Bit
0
1