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| 型号： | LM89EVAL |
| 厂商： | National Semiconductor |
| 文件页数： | 18/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION LM89 |
| 标准包装： | 1 |
| 传感器类型： | 温度 |
| 传感范围： | 0°C ~ 125°C |
| 接口： | SMBus（2 线/I²C） |
| 灵敏度： | ±1°C |
| 电源电压： | 3 V ~ 3.6 V |
| 嵌入式： | 否 |
| 已供物品： | 板，CD |
| 已用 IC / 零件： | LM89 |
| 相关产品： | LM89CIM-ND - IC TEMP SENSOR DGTL 8-SOIC LM89CIMX-ND - IC TEMP SENSOR DGTL 8-SOIC LM89CIMM-ND - IC TEMP SENSOR DGTL 8-MSOP LM89CIMMX-ND - IC TEMP SENSOR DGTL 8-MSOP |
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SNIS128C – AUGUST 2002 – REVISED MARCH 2013
Table 3. LOCAL and REMOTE TEMPERATURE REGISTERS (RTLB) (Read Only Address 10h):
BIT
Value
D7
0.5
D6
0.25
D5
0.125
D4
0
D3
0
D2
0
D1
0
D0
0
For RTLB D7–D5: Temperature Data. LSB = 0.125°C. Two's complement format.
The maximum value available from the Local Temperature register is 127; the minimum value available from the
Local Temperature register is -128. The maximum value available from the Remote Temperature register is
127.875; the minimum value available from the Remote Temperature registers is ? 128.875.
STATUS REGISTER (SR)
Table 4. STATUS REGISTER (SR) (Read Only Address 02h):
D7
Busy
D6
LHIGH
D5
LLOW
D4
RHIGH
D3
RLOW
D2
OPEN
D1
RCRIT
D0
LCRIT
Power up default is with all bits “0” (zero).
D0: LCRIT: When set to “1” indicates a Local Critical Temperature alarm.
D1: RCRIT: When set to “1” indicates a Remote Diode Critical Temperature alarm.
D2: OPEN: When set to “1” indicates a Remote Diode disconnect.
D3: RLOW: When set to “1” indicates a Remote Diode LOW Temperature alarm
D4: RHIGH: When set to “1” indicates a Remote Diode HIGH Temperature alarm.
D5: LLOW: When set to “1” indicates a Local LOW Temperature alarm.
D6: LHIGH: When set to “1” indicates a Local HIGH Temperature alarm.
D7: Busy: When set to “1” ADC is busy converting.
CONFIGURATION REGISTER
Table 5. CONFIGURATION REGISTER (Read Address 03h /Write Address 09h):
D7
ALERT mask
D6
RUN/STOP
D5
0
D4
Remote
D3
0
D2
Local
D1
0
D0
Fault Queue
T_CRIT_A
mask
T_CRIT_A
mask
Power up default is with all bits “0” (zero)
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..
18
Product Folder Links: LM89
Copyright ? 2002–2013, Texas Instruments Incorporated
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