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參數(shù)資料
| 型號(hào)： | LM90 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 3 Degree Celcious Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface |
| 中文描述： | 3度Celcious精確，遠(yuǎn)程二極管和本地?cái)?shù)字溫度傳感器兩線接口 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 384K |
| 代理商： | LM90 |
2.0 LM90 REGISTERS
(Continued)
D7: ALERT mask: When set to “1” ALERT interrupts are masked.
D6: RUN/STOP: When set to “1” SHUTDOWN is enabled.
D5: is not defined and defaults to “0”.
D4: Remote T_CRIT mask: When set to “1” a diode temperature reading that exceeds T_CRIT setpoint will not activate the
T_CRIT_A pin.
D3: is not defined and defaults to “0”.
D2: Local T_CRIT mask: When set to “1” a Local temperature reading that exceeds T_CRIT setpoint will not activate the
T_CRIT_A pin.
D1: is not defined and defaults to “0”.
D0: Fault Queue: when set to “1” three consecutive remote temperature measurements outside the HIGH, LOW, or T_CRIT
setpoints will trigger an “Outside Limit” condition resulting in setting of status bits and associated output pins..
2.5 CONVERSION RATE REGISTER
(Read Address 04h /Write
Address 0Ah)
Value
Conversion
Rate
62.5 mHz
125 mHz
250 mHz
500 mHz
1 Hz
2 Hz
00
01
02
03
04
05
(Read Address 04h /Write
Address 0Ah)
Value
Conversion
Rate
4 Hz
8 Hz
16 Hz
32 Hz
Undefined
06
07
08
09
10-255
2.6 LOCAL and REMOTE HIGH SETPOINT REGISTERS (LHS, RHSHB, and RHSLB)
(Read Address 05h, 07h /Write Address 0Bh, 0Dh):
BIT
Value
D7
SIGN
D6
64
D5
32
D4
16
D3
8
D2
4
D1
2
D0
1
For LHS and RHSHB: HIGH setpoint temperature data. Power up default is LHIGH = RHIGH = 70C. 1LSB = 1C. Two’s
complement format.
(Read/Write Address 13h):
BIT
Value
D7
0.5
D6
0.25
D5
0.125
D4
0
D3
0
D2
0
D1
0
D0
0
For RHSLB: Remote HIGH Setpoint Low Byte temperature data. Power up default is 0C. 1LSB = 0.125C. Two’s complement
format.
2.7 LOCAL and REMOTE LOW SETPOINT REGISTERS (LLS, RLSHB, and RLSLB)
(Read Address 06h, 08h, /Write Address 0Ch, 0Eh):
BIT
Value
D7
SIGN
D6
64
D5
32
D4
16
D3
8
D2
4
D1
2
D0
1
For LLS and RLSHB: HIGH setpoint temperature data. Power up default is LHIGH = RHIGH = 0C. 1LSB = 1C. Two’s
complement format.
(Read/Write Address 14h):
BIT
Value
D7
0.5
D6
0.25
D5
0.125
D4
0
D3
0
D2
0
D1
0
D0
0
For RLSLB: Remote HIGH Setpoint Low Byte temperature data. Power up default is 0C. 1LSB = 0.125C. Two’s complement
format.
2.8 REMOTE TEMPERATURE OFFSET REGISTERS (RTOHB and RTOLB)
(Read/Write Address 11h):
BIT
Value
D7
SIGN
D6
64
D5
32
D4
16
D3
8
D2
4
D1
2
D0
1
L
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