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參數資料
| 型號： | TMP431BDGKT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數： | 9/40頁 |
| 文件大小： | 790K |
| 代理商： | TMP431BDGKT |
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SBOS441C
– SEPTEMBER 2009 – REVISED FEBRUARY 2011
Status Registers
TMP431 Status Register
Table 5. TMP431 Status Register Format
TMP431 STATUS REGISTER (Read = 02h, Write = NA)
BIT #
D7
D6
D5
D4
D3
D2
D1
D0
BIT NAME
BUSY
LHIGH
LLOW
RHIGH
RLOW
OPEN
RTHRM
LTHRM
POR VALUE
0(1)
0
(1)
The BUSY bit changes to
‘1’ almost immediately (<< 100μs) following power-up, as the TMP431 begins the first temperature conversion.
It is high whenever the TMP431 is converting a temperature reading.
space
The TMP431 has a Status Register to report the state
The RHIGH bit reads as
‘1’ if the remote temperature
of the temperature comparators. Table 5 shows the
has exceeded the remote high limit and remains
Status Register bits. The Status Register is read-only
greater than the remote high limit less the value in
and is read by reading from pointer address 02h.
the Hysteresis Register.
The BUSY bit reads as
‘1’ if the ADC is making a
The LLOW and RLOW bits are not affected by the
conversion. It reads as
‘0’ if the ADC is not
AL/TH bit. The LLOW bit reads as
‘1’ if the local low
converting.
limit was exceeded since the last clearing of the
The OPEN bit reads as
‘1’ if the remote transistor
Status Register. The RLOW bit reads as
‘1’ if the
was detected as open since the last read of the
remote low limit was exceeded since the last clearing
Status Register. The OPEN status is only detected
of the Status Register.
when the ADC is attempting to convert a remote
The values of the LLOW, RLOW, and OPEN (as well
temperature.
as LHIGH and RHIGH when AL/TH is
‘0’) are latched
The
RTHRM
bit
reads
as
‘1’
if
the
remote
and read as
‘1’ until the Status Register is read or a
temperature exceeds the remote THERM limit and
device reset occurs. These bits are cleared by
remains greater than the remote THERM limit less
reading the Status Register, provided that the
the value in the shared Hysteresis Register; see
condition causing the flag to be set no longer exists.
The values of BUSY, LTHRM, and RTHRM (as well
as LHIGH and RHIGH when ALERT/THERM2 is
‘1’)
The LTHRM bit reads as
‘1’ if the local temperature
are not latched and are not cleared by reading the
exceeds the local THERM limit and remains greater
Status Register. They always indicate the current
than the local THERM limit less the value in the
state, and are updated appropriately at the end of the
shared Hysteresis Register; see Figure 21.
corresponding ADC conversion. Clearing the Status
Register bits does not clear the state of the ALERT
The LHIGH and RHIGH bit values depend on the
pin; an SMBus alert response address command
state of the AL/TH bit in the Configuration Register 1.
must be used to clear the ALERT pin.
If the AL/TH bit is
‘0’, the LHIGH bit reads as ‘1’ if the
local high limit was exceeded since the last clearing
The TMP431 NORs LHIGH, LLOW, RHIGH, RLOW,
of the Status Register. The RHIGH bit reads as
‘1’ if
and OPEN, so a status change for any of these flags
the remote high limit was exceeded since the last
from
‘0’ to ‘1’ automatically causes the ALERT pin to
clearing of the Status Register. If the AL/TH bit is
‘1’,
go low (only applies when the ALERT/THERM2 pin is
the remote high limit and the local high limit are used
configured for ALERT mode).
to implement a THERM2 function. LHIGH reads as
‘1’
if the local temperature exceeds the local high limit
and remains greater than the local high limit less the
value in the Hysteresis Register.
2009–2011, Texas Instruments Incorporated
17
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相關代理商/技術參數 |
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| TMP431CDGKR | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| TMP431CDGKT | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| TMP431DDGKR | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| TMP431DDGKT | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| TMP432ADGSR | 功能描述:板上安裝溫度傳感器 Remote & Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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