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LM64 Datasheet(PDF) 24 Page - Texas Instruments

Part # LM64
Description  LM64 ±1°C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIOs
PDF  42 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM64 Datasheet(HTML) 24 Page - Texas Instruments

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Address
Hex
Read/
Write
Bits
POR
Value
Name
Description
4C
Read
(Write
only if
reg 4A
bit 5 =
1.)
7:6
00
PWM
Value
These bits are unused and always set to 0
5:0 000000
If PWM Program (register 4A, bit 5) = 0 this register is read only and reflects the
LM64’s current PWM value from the Lookup Table.
If PWM Program (register 4A, bit 5) = 1, this register is read/write and the desired
PWM value is written directly to this register, instead of from the Lookup Table, for
direct fan speed control.
This register will read 0 during the Spin-Up cycle.
See Application Notes section at the end of this datasheet for more information
regarding the PWM Value and Duty Cycle in %.
50HEX to 5FHEX LOOKUP TABLE (7 Bits for Temperature and 6 Bits for PWM for each Temperature/PWM Pair)
50
Read.
(Write
only if
reg 4A
bit 5 =
1.)
7
0
Lookup Table
Temperature
Entry 1
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 51.
51
7:6
00
Lookup Table
PWM Entry 1
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 50.
52
7
0
Lookup Table
Temperature
Entry 2
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 53.
53
7:6
00
Lookup Table
PWM Entry 2
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 52.
54
7
0
Lookup Table
Temperature
Entry 3
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 55.
55
7:6
00
Lookup Table
PWM Entry 3
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 54.
56
7
0
Lookup Table
Temperature
Entry 4
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 57.
57
7:6
00
Lookup Table
PWM Entry 4
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 56.
58
7
0
Lookup Table
Temperature
Entry 5
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 59.
59
7:6
00
Lookup Table
PWM Entry 5
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 58.
5A
7
0
Lookup Table
Temperature
Entry 6
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 5B.
5B
7:6
00
Lookup Table
PWM Entry 6
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 5A.
5C
7
0
Lookup Table
Temperature
Entry 7
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 5D.
5D
7:6
00
Lookup Table
PWM Entry 7
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 5C.
5E
7
0
Lookup Table
Temperature
Entry 8
This bit is unused and always set to 0.
6:0
0x7F
If the remote diode temperature exceeds this value, the PWM output will be the value
in Register 5F.
5F
7:6
00
Lookup Table
PWM Entry 8
These bits are unused and always set to 0.
5:0
0x3F
The PWM value corresponding to the temperature limit in register 5E.
LM64
SNAS207B – MAY 2004 – REVISED JANUARY 2024
www.ti.com
24
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Product Folder Links: LM64



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