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型號(hào)：	IF280C52EXXX-16SHXXX:RD
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
文件頁(yè)數(shù)：	110/849頁(yè)
文件大?。?/td>	12530K

32099I–01/2012

AT32UC3L016/32/64

To prevent further modifications by software, the content of the register can be set as read-only

by writing a one to the Store Final Value bit (SM33.SFV). When this bit is one, software can not

change the SM33 register content until the device is reset.

Operating modes

The SM33 is disabled by default and is enabled by writing to the Supply Monitor Control field in

the SM33 control register (SM33.CTRL). The current state of the SM33 can be read from the

Supply Monitor On Indicator bit in SM33 (SM33.ONSM). Enabling the SM33 will disable the

POR33 detector.

The SM33 can operate in continuous mode or in sampling mode. In sampling mode, the SM33 is

periodically enabled for a short period of time, just enough to make a a measurement, and then

disabled for a longer time to reduce power consumption.

By default, the SM33 operates in sampling mode during DeepStop and Static mode and in con-

tinuous mode for other sleep modes. Sampling mode can also be forced during sleep modes

other than DeepStop and Static, and during normal operation, by writing a one to the Force

Sampling Mode bit in the SM33 register (SM33.FS).

The user can select the sampling frequency by writing to the Sampling Frequency field in SM33

(SM33.SAMPFREQ). The sampling mode uses the 32 kHz RC oscillator (RC32K) as clock

source. The 32kHz RC oscillator is automatically enabled when the SM33 operates in sampling

Interrupt and reset generation

If the SM33 is enabled (SM33.CTRL is one or two) and the regulator supply voltage drops below

the SM33 threshold, the SM33DET bit in the Power and Clocks Status Register

(PCLKSR.SM33DET) is set. This bit is cleared when the supply voltage goes above the thresh-

old. An interrupt request is generated on a zer-to-one transition of PCLKSR.SM33DET if the

Supply Monitor 3.3V Detection bit in the Interrupt Mask Register (IMR.SM33DET) is set. This bit

is set by writing a one to the corresponding bit in the Interrupt Enable Register (IER.SM33DET).

If SM33.CTRL is one, a POR will be generated when the voltage drops below the threshold. If

SM33.CTRL is two, the device will not be reset.

Factory calibration

After a reset the SM33.CALIB field is loaded with a factory defined value. This value is chosen

so that the nominal threshold value is 1.75V. The flash calibration is redone after any reset, and

the Flash Calibration Done bit in SM33 (SM33.FCD) is set before program execution starts in the

Although it is not recommended to override default factory settings, it is still possible to override

the default value by writing to SM33.CALIB

Temperature Sensor

Rev: 1.0.0.0

The Temperature Sensor is connected to an ADC channel, please refer to the ADC chapter for

details. It is enabled by writing one to the Enable bit (EN) in the Temperature Sensor Configura-

tion Register (TSENS). The Temperature Sensor can not be calibrated.

Please refer to the Electrical Characteristics chapter for more details.

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
IF280C52-L16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-12	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-20	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-25	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller

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