參數(shù)資料
型號(hào): PIC12F1822-I/MF
廠商: Microchip Technology
文件頁(yè)數(shù): 59/109頁(yè)
文件大小: 0K
描述: IC MCU 8BIT FLASH 8DFN
產(chǎn)品培訓(xùn)模塊: 8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 120
系列: PIC® XLP™ 12F
核心處理器: PIC
芯體尺寸: 8-位
速度: 32MHz
連通性: I²C,LIN,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 6
程序存儲(chǔ)器容量: 3.5KB(2K x 14)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 8-VDFN 裸露焊盤
包裝: 管件
244
7674F–AVR–09/09
ATmega164P/324P/644P
Figure 21-1. Analog-to-digital Converter Block Schematic
21.3
Operation
The ADC converts an analog input voltage to a 10-bit digital value through successive approxi-
mation. The minimum value represents GND and the maximum value represents the voltage on
the AREF pin minus 1 LSB. Optionally, AVCC or an internal 2.56V reference voltage may be
connected to the AREF pin by writing to the REFSn bits in the ADMUX Register. The internal
voltage reference may thus be decoupled by an external capacitor at the AREF pin to improve
noise immunity.
The analog input channel and differential gain are selected by writing to the MUX bits in
ADMUX. Any of the ADC input pins, as well as GND and a fixed bandgap voltage reference, can
be selected as single ended inputs to the ADC. A selection of ADC input pins can be selected as
positive and negative inputs to the differential gain amplifier.
ADC CONVERSION
COMPLETE IRQ
8-BIT DATABUS
15
0
ADIE
ADATE
ADSC
ADEN
ADIF
MUX[4:0]
ADPS[2:0]
SAMPLE & HOLD
COMPARATOR
INTERNAL
REFERENCE
(1.1V/2.56V)
AVCC
REFS[1:0]
ADLAR
CHANNEL
SELECTION
ADC[9:0]
ADC
MULTIPLEXER
OUTPUT
GAIN
AMPLIFIER
AREF
BANDGAP (1.1V)
REFERENCE
GND
CONVERSION LOGIC
ADC CTRL & STATUS
REGISTER B (ADCSRB)
ADC CTRL & STATUS
REGISTER A (ADCSRA)
PRESCALER
ADC MULTIPLEXER
SELECT (ADMUX)
MUX DECODER
DIFF
/
GAIN
SELECT
ADC DATA REGISTER
(ADCH/ADCL)
ADC[2:0]
TRIGGER
SELECT
START
INTERRUPT
FLAGS
ADTS[2:0]
+
-
NEG
INPUT
MUX
POS
INPUT
MUX
ADC[7:0]
+
-
10-bit DAC
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