參數(shù)資料
型號: ST72331
廠商: 意法半導(dǎo)體
英文描述: 8-Bit MCU with 8 to 16K ROM/OTP/EPROM, 256 EEPROM, 384 to 512 Bytes RAM, ADC, WDG, SCI, SPI and 2 Timers(8位微控制器(8M))
中文描述: 8位微控制器與8至16K的光碟/雙層/存儲器,256的EEPROM,384字節(jié)RAM為512,藝發(fā)局,水分散粒劑,脊髓損傷,SPI和2計時器(8位微控制器(8米))
文件頁數(shù): 74/98頁
文件大?。?/td> 1123K
代理商: ST72331
74/98
ST72331
4.7 8-BIT A/D CONVERTER (ADC)
4.7.1 Introduction
The on-chip Analog to Digital Converter (ADC) pe-
ripheral is a 8-bit, successive approximation con-
verter with internal sample and hold circuitry. This
peripheral has up to 8 multiplexed analog input
channels (refer to device pin out description) that
allow the peripheral to convert the analog voltage
levels from up to 8 different sources.
The result of the conversion is stored in a 8-bit
Data Register. The A/D converter is controlled
through a Control/Status Register.
4.7.2 Main Features
I
8-bit conversion
I
Up to 8 channels with multiplexed input
I
Linear successive approximation
I
Data register (DR) which contains the results
I
Conversion complete status flag
I
On/off bit (to reduce consumption)
The block diagram is shown in
Figure 44
.
Figure 45. ADC block diagram
SAMPLE
&
HOLD
ANALOG
MUX
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
0
COCO
CH0
CH1
CH2
-
-
ADON
(Control Status Register) CSR
AD7
AD0
AD1
AD2
AD3
AD6
AD5
(Data Register) DR
f
CPU
ANALOG TO
DIGITAL
CONVERTER
AD4
136
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