參數(shù)資料
型號： LM64
廠商： National Semiconductor Corporation
元件分類： 溫度/濕度傳感器
英文描述： 【1∑C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIO’s
中文描述： 【1ΣC遠程二極管溫度傳感器，PWM風扇控制和5個GPIO的
文件頁數(shù)： 22/29頁
文件大?。?/td> 363K
代理商： LM64
2.0 LM64 Registers
Local Temperature And Local High Setpoint Registers
(Continued)
ADDRESS
Hex
00
HEX
LOCAL TEMPERATURE REGISTER (8-bits)
Read
Only
05 (0B)
HEX
LOCAL HIGH SETPOINT REGISTER (8-bits)
0x46
(70)
Read/
Write
Bits
POR
Value
Name
Description
00
7:0
N/A
Local Temperature Reading (8-bit)
8-bit temperature of the LM64.
05
R/W
7:0
Local HIGH Setpoint
High Setpoint for the internal diode.
Remote Diode Temperature, Offset And Setpoint Registers
ADDRESS
Hex
Read/
Write
Bits
POR
Value
Name
Description
01
Read
Only
7:0
N/A
Remote Diode
Temperature
Reading (MSB)
This is the MSB of the LM64 remote diode temperature value, 2’s
complement. Bit 7 is the sign bit, bit 6 has a weight 64C, and bit 0 has
a weight of 1C.
Read this byte first.
The actual remote diode
temperature is 16C higher than the values in registers 0x01 and 0x10.
This is the LSB of the LM64 remote diode temperature value, in 2’s
complement. Bit 7 has a weight 0.5C, bit 6 has a weight of 0.25C, and
bit 5 has a weight of 0.125C. The actual remote diode temperature is
16C higher than the values in registers 0x01 and 0x10.
Always 00.
10
Read
Only
7:5
N/A
Remote Diode
Temperature
Reading (LSB)
4:0
00
11
R/W
7:5
00
Remote
Temperature
OFFSET (MSB)
These registers contain the offset value added to, or subtracted from, the
remote diode’s reading to compensate for the different non-ideality
factors of different processors, diodes, etc. The 2’s complement value, in
these registers is added to the output of the LM64’s ADC to form the
temperature reading contained in registers 01 and 10.
12
R/W
7:5
00
Remote
Temperature
OFFSET (LSB)
Remote HIGH
Setpoint (MSB)
Remote HIGH
Setpoint (LSB)
Remote LOW
Setpoint (MSB)
Remote LOW
Setpoint (LSB)
4:0
00
Always 00.
07 (0D)
R/W
7:0
0x46
(70C)
00
00
00
(0C)
00
00
High setpoint temperature for remote diode. Same format as
Remote
Temperature Reading
(registers 01 and 10).
13
R/W
7:5
4:0
Always 00.
08 (0E)
R/W
7:0
Low setpoint temperature for remote diode. Same format as
Remote
Temperature Reading
(registers 01 and 10).
14
R/W
7:5
4:0
Always 00.
This 8-bit integer storing the T_CRIT limit is initially 85C (101C actual
remote T_Crit limit). This value can be changed at any time after
power-up.
8-bit integer storing T_CRIT hysteresis. T_CRIT stays activated until the
remote diode temperature goes below [(T_CRIT Limit)—(T_CRIT
Hysteresis)].
These bits are unused and should always set to 0.
00: Filter Disabled
01: Filter Level 1 (minimal filtering, same as 10)
10: Filter Level 1 (minimal filtering, same as 01)
11: Filter Level 2 (maximum filtering)
0: the ALERT pin functions as an Interrupt or ARA mode.
1: the ALERT pin behaves as a comparator, asserting itself when an
ALERT condition exists, de-asserting itself when the ALERT condition
goes away.
19
R/W
7:0
0x55
(85C)
Remote Diode
T_CRIT Limit
21
R/W
7:0
0x0A
(10C)
Remote Diode
T_CRIT
Hysteresis
BF
R/W
7:3
00000
2:1
00
Remote Diode
Temperature
Filter
0
0
Comparator
Mode
L
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22
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