參數(shù)資料
型號(hào)： AT30TS750-MA8-T
廠商： ATMEL CORP
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT
封裝： 2 X 3 MM, 0.60 MM HEIGHT, GREEN, PLASTIC, MO-229, UDFN-8
文件頁(yè)數(shù)： 27/52頁(yè)
文件大?。?/td> 1369K
代理商： AT30TS750-MA8-T
Atmel AT30TS750 [Preliminary]
7.
Register Locking
All volatile and nonvolatile configuration and limit registers (the Configuration Register, TLOW
Limit Register, THIGH Limit Register, Nonvolatile Configuration Register, Nonvolatile TLOW Limit
Register, and Nonvolatile THIGH Limit Register) can be locked from data changes by utilizing the
RLCK bit in the Nonvolatile Configuration Register. This provides the ability to lock the registers
and protect them from inadvertent or erroneous data changes, giving system designers a more
robust and secure temperature sensing solution compared to other industry devices. The RLCK
bit can be reset so that the various registers can be modified if needed. Resetting of the RLCK
bit is done by writing to the Nonvolatile Configuration Register and changing the RLCK bit back to
a logic “0” state.
When the registers are locked, only the RLCK bit of the Nonvolatile
Configuration Register can be altered, and any attempts at changing other bits in the Nonvolatile
Configuration Register will be ignored.
In addition, the volatile and nonvolatile configuration and limit registers can be permanently
locked down by using the RLCKDWN bit in the Nonvolatile Configuration Register. When the
RLCKDWN bit is set, the volatile and nonvolatile configuration and limit registers will be
permanently locked down so that they can never be modified again. Unlike the RLCK bit, the
RLCKDWN bit is one-time programmable and cannot be reset.
Therefore, the lockdown
mechanism is not reversible. The RLCKDWN bit takes priority over the RLCK bit (see Table 7-1).
Having the ability to permanently lock down the volatile and nonvolatile configuration and limit
registers provides the ability to have a pre-defined, secure, and unchangeable temperature
sensing solution for applications dealing with liability, risk, or safety concerns.
The register locking is not affected by power cycles or reset operations, including the General
Call Reset. Therefore, if a device is power cycled or reset with the registers in the locked or
locked-down state, then the registers will remain locked or locked-down when normal device
operation resumes.
Table 7-1.
Register Locking
RLCKDWN
RLCK
Locking Status
0
Volatile and nonvolatile configuration and limit registers are unlocked and
can be modified.
0
1
Volatile and nonvolatile configuration and limit registers are locked and
cannot be modified except for the RLCK bit of the Nonvolatile Configuration
Register which can be reset.
1
0
Volatile and nonvolatile configuration and limit registers are permanently
locked down and can never be modified again.
1
Volatile and nonvolatile configuration and limit registers are permanently
locked down and can never be modified again.
8.
Operations Allowed During Nonvolatile Busy Status
While the AT30TS750 is busy performing nonvolatile operations such as programming the
Nonvolatile Configuration Register, certain other operations can still be executed.
details which commands are allowed or not allowed during a nonvolatile busy operation. For
those commands that are not allowed during a nonvolatile busy operation, the device will respond
with a NACK where it would normally respond with an ACK. For example, if attempting to write to
8749A-DTS-03/11
33
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT30TS750SS8B 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:9- to 12-bit Selectable, ?±0.5?°C Accurate Digital Temperature Sensor with Nonvolatile Registers
AT30TS750-SS8-B 功能描述:板上安裝溫度傳感器 TMP SENSOR RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
AT30TS750SS8T 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:9- to 12-bit Selectable, ?±0.5?°C Accurate Digital Temperature Sensor with Nonvolatile Registers
AT30TS750-SS8-T 功能描述:板上安裝溫度傳感器 TMP SENSOR RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
AT30TS750XM8B 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:9- to 12-bit Selectable, ?±0.5?°C Accurate Digital Temperature Sensor with Nonvolatile Registers
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