参数资料
型号: ATTINY13V-10SUR
厂商: Atmel
文件页数: 165/176页
文件大小: 0K
描述: MCU AVR 1KB FLASH 10MHZ 8SOIC
产品培训模块: tinyAVR Introduction
标准包装: 2,000
系列: AVR® ATtiny
核心处理器: AVR
芯体尺寸: 8-位
速度: 10MHz
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 6
程序存储器容量: 1KB(512 x 16)
程序存储器类型: 闪存
EEPROM 大小: 64 x 8
RAM 容量: 64 x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 4x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 8-SOIC(0.209",5.30mm 宽)
包装: 带卷 (TR)
其它名称: ATTINY13V-10SUR-ND
ATTINY13V-10SURTR
2010-2011 Microchip Technology Inc.
Preliminary
DS41430C-page 89
PIC16(L)F720/721
11.0 TEMPERATURE INDICATOR
MODULE
This family of devices is equipped with a temperature
circuit designed to measure the operating temperature
of the silicon die. The circuit’s range of operating
temperature falls between -40°C and +85°C. The
output is a voltage that is proportional to the device
temperature. The output of the temperature indicator is
internally connected to the device ADC.
The circuit may be used as a temperature threshold
detector or a more accurate temperature indicator,
depending on the level of calibration performed. A one-
point calibration allows the circuit to indicate a
temperature closely surrounding that point. A two-point
calibration allows the circuit to sense the entire range
of temperature more accurately. Reference Application
Note AN1333, “Use and Calibration of the Internal
Temperature Indicator” (DS01333) for more details
regarding the calibration process.
11.1
Circuit Operation
Figure 11-1 shows a simplified block diagram of the
temperature circuit. The proportional voltage output is
achieved by measuring the forward voltage drop across
multiple silicon junctions.
Equation 11-1 describes the output characteristics of
the temperature indicator.
EQUATION 11-1:
VOUT RANGES
The temperature sense circuit is integrated with the
Fixed
Voltage
Reference
(FVR)
module.
See
information.
The circuit is enabled by setting the TSEN bit of the
FVRCON register. When disabled, the circuit draws no
current.
The circuit operates in either high or low range. The high
range, selected by setting the TSRNG bit of the
FVRCON register, provides a wider output voltage. This
provides more resolution over the temperature range,
but may be less consistent from part to part. This range
requires a higher bias voltage to operate and thus, a
higher VDD is needed.
The low range is selected by clearing the TSRNG bit of
the FVRCON register. The low range generates a lower
voltage drop and thus, a lower bias voltage is needed to
operate the circuit. The low range is provided for low
voltage operation.
FIGURE 11-1:
TEMPERATURE CIRCUIT
DIAGRAM
11.2
Minimum Operating VDD vs.
Minimum Sensing Temperature
When the temperature circuit is operated in low range,
the device may be operated at any operating voltage
that is within specifications.
When the temperature circuit is operated in high range,
the device operating voltage, VDD, must be high
enough to ensure that the temperature circuit is
correctly biased.
Table 11-1 shows the recommended minimum VDD vs.
range setting.
TABLE 11-1:
RECOMMENDED VDD VS.
RANGE
11.3
Temperature Output
The output of the circuit is measured using the internal
Analog-to-Digital converter. Channel 14 is reserved for
the temperature circuit output. Refer to Section 9.0
detailed information.
High Range: VOUT = VDD - 4VT
Low Range: VOUT = VDD - 2VT
Min. VDD, TSRNG = 1
Min. VDD, TSRNG = 0
3.6V
1.8V
Note:
Every time the ADC MUX is changed to
the temperature indicator output selection
(CHS bit in the ADCCON0 register), wait
500 usec for the sampling capacitor to
fully charge before sampling the tempera-
ture indicator output.
TSEN
TSRNG
VDD
To ADC
VOUT
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