LM64EVAL National Semiconductor, LM64EVAL Datasheet - Page 24

• Manufacturer Part Number: LM64EVAL
• Description: BOARD EVALUATION LM64
• Manufacturer: National Semiconductor

Specifications of LM64EVAL

• Sensor Type: Temperature, Fan Controller
• Sensing Range: 0°C ~ 85°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1°C
• Voltage - Supply: 3 V ~ 3.6 V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: LM64
• Lead Free Status / RoHS Status: Not applicable / Not applicable

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ADDRESS
ADDRESS
04 (0A)
04 (0A)
1A
1B
2.0 LM64 Registers
04 (0A)
Conversion Rate And One-Shot Registers
ID Registers
General Purpose Registers
Note 17: For Register 0x1A the Power-On-Reset for the five LSB’s are the logic states present on the 5 GPIOx pins.
Note 18: For Register 0x1B the Power-On-Reset for the five LSB’s are the logic states present on the 5 GPDx pins.
HEX
HEX
Hex
Hex
ADDRESS
FF
FE
0F
1A
1B
HEX
HEX
Hex
GENERAL PURPOSE INPUT REGISTER (8-bits)
GENERAL PURPOSE OUTPUT REGISTER (8-bits)
HEX
HEX
FF
FE
STEPPING / DIE REVISION ID REGISTER (8-bits)
MANUFACTURER’S ID REGISTER (8-bits)
ONE-SHOT REGISTER (8-bits)
CONVERSION RATE REGISTER (8-bits)
Read/
Write
Read/
Write
Write
Read
R/W
Only
Only
R/W
Bits
7:0
7:0
Bits
7:5
4:0
7:5
4:0
Read/
Write
Read
Read
Only
Only
Value
POR
0x08
N/A
(Note 17)
(Note 18)
Value
POR
000
000
(Continued)
Bits
Conversion
7:0
7:0
One Shot
Trigger
Name
Rate
Purpose
Purpose
General
General
Output
Name
Input
Value
POR
0x51
0x01
Sets the conversion rate of the LM64.
00000000 = 0.0625 Hz
00000001 = 0.125 Hz
00000010 = 0.25 Hz
00000011 = 0.5 Hz
00000100 = 1 Hz
00000101 = 2 Hz
00000110 = 4 Hz
00000111 = 8 Hz
00001000 = 16 Hz
00001001 = 32 Hz
All other values = 32 Hz
With the LM64 in the STANDBY mode a single write to this register will
initiate one complete temperature conversion cycle.
24
These bits are unused and always set to 0.
These 5 bits reflect the logic states of the GPIOx pins.
These bits are unused and always set to 0.
These 5 bits reflect the GPI register bits [4:0] except for
Power-On-Default when they are the 5 logic states of the
General Pupose Default (GPD) input pins.
Manufacturer’s ID
Stepping/Die
Revision ID
Name
Description
Description
Version of LM64
0x01 = National Semiconductor
Description