参数资料
型号: PIC16LF72T-I/ML
厂商: Microchip Technology
文件页数: 128/136页
文件大小: 0K
描述: IC MCU FLASH 2KX14 LV AD 28-QFN
产品培训模块: Asynchronous Stimulus
标准包装: 1,600
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 22
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 5x8b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 28-VQFN 裸露焊盘
包装: 带卷 (TR)
91
2535J–AVR–08/10
ATtiny13
Quantization Error: Due to the quantization of the input voltage into a finite number of codes,
a range of input voltages (1 LSB wide) will code to the same value. Always ± 0.5 LSB.
Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition compared to
an ideal transition for any code. This is the compound effect of offset, gain error, differential
error, non-linearity, and quantization error. Ideal value: ± 0.5 LSB.
14.11 ADC Conversion Result
After the conversion is complete (ADIF is high), the conversion result can be found in the ADC
Result Registers (ADCL, ADCH).
For single ended conversion, the result is
where VIN is the voltage on the selected input pin and VREF the selected voltage reference (see
Table 14-2 on page 91 and Table 14-3 on page 92). 0x000 represents analog ground, and
0x3FF represents the selected reference voltage minus one LSB.
14.12 Register Description
14.12.1
ADMUX – ADC Multiplexer Selection Register
Bit 7 – Res: Reserved Bit
This bit is reserved bit in the ATtiny13 and will always read as zero.
Bit 6 – REFS0: Reference Selection Bit
This bit selects the voltage reference for the ADC, as shown in Table 14-2. If this bit is changed
during a conversion, the change will not go in effect until this conversion is complete (ADIF in
ADCSRA is set).
Bit 5 – ADLAR: ADC Left Adjust Result
The ADLAR bit affects the presentation of the ADC conversion result in the ADC Data Register.
Write one to ADLAR to left adjust the result. Otherwise, the result is right adjusted. Changing the
ADLAR bit will affect the ADC Data Register immediately, regardless of any ongoing conver-
sions. For a complete description of this bit, see “ADCL and ADCH – The ADC Data Register” on
ADC
VIN 1024
VREF
--------------------------
=
Bit
7
65432
10
REFS0
ADLAR
MUX1
MUX0
ADMUX
Read/Write
R
R/W
R
R/W
Initial Value
0
00000
00
Table 14-2.
Voltage Reference Selections for ADC
REFS0
Voltage Reference Selection
0VCC used as analog reference.
1
Internal Voltage Reference.
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