- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄25639 > MS80C51T-16D (TEMIC SEMICONDUCTORS) 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 PDF資料下載
參數(shù)資料
| 型號： | MS80C51T-16D |
| 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, PQCC44 |
| 文件頁數(shù)： | 16/80頁 |
| 文件大小： | 5152K |
| 代理商： | MS80C51T-16D |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁
207
2466T–AVR–07/10
ATmega16(L)
Using the ADC Interrupt Flag as a trigger source makes the ADC start a new conversion as soon
as the ongoing conversion has finished. The ADC then operates in Free Running mode, con-
stantly sampling and updating the ADC Data Register. The first conversion must be started by
writing a logical one to the ADSC bit in ADCSRA. In this mode the ADC will perform successive
conversions independently of whether the ADC Interrupt Flag, ADIF is cleared or not.
If Auto Triggering is enabled, single conversions can be started by writing ADSC in ADCSRA to
one. ADSC can also be used to determine if a conversion is in progress. The ADSC bit will be
read as one during a conversion, independently of how the conversion was started.
Prescaling and
Conversion Timing
Figure 100. ADC Prescaler
By default, the successive approximation circuitry requires an input clock frequency between 50
kHz and 200 kHz to get maximum resolution. If a lower resolution than 10 bits is needed, the
input clock frequency to the ADC can be higher than 200 kHz to get a higher sample rate.
The ADC module contains a prescaler, which generates an acceptable ADC clock frequency
from any CPU frequency above 100 kHz. The prescaling is set by the ADPS bits in ADCSRA.
The prescaler starts counting from the moment the ADC is switched on by setting the ADEN bit
in ADCSRA. The prescaler keeps running for as long as the ADEN bit is set, and is continuously
reset when ADEN is low.
When initiating a single ended conversion by setting the ADSC bit in ADCSRA, the conversion
starts at the following rising edge of the ADC clock cycle. See “Differential Gain Channels” on
page 209 for details on differential conversion timing.
A normal conversion takes 13 ADC clock cycles. The first conversion after the ADC is switched
on (ADEN in ADCSRA is set) takes 25 ADC clock cycles in order to initialize the analog circuitry.
The actual sample-and-hold takes place 1.5 ADC clock cycles after the start of a normal conver-
sion and 13.5 ADC clock cycles after the start of a first conversion. When a conversion is
complete, the result is written to the ADC Data Registers, and ADIF is set. In single conversion
mode, ADSC is cleared simultaneously. The software may then set ADSC again, and a new
conversion will be initiated on the first rising ADC clock edge.
When Auto Triggering is used, the prescaler is reset when the trigger event occurs. This assures
a fixed delay from the trigger event to the start of conversion. In this mode, the sample-and-hold
takes place 2 ADC clock cycles after the rising edge on the trigger source signal. Three addi-
tional CPU clock cycles are used for synchronization logic. When using Differential mode, along
with Auto triggering from a source other than the ADC Conversion Complete, each conversion
7-BIT ADC PRESCALER
ADC CLOCK SOURCE
CK
ADPS0
ADPS1
ADPS2
CK/128
CK/2
CK/4
CK/8
CK/16
CK/32
CK/64
Reset
ADEN
START
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MF280C51C-12D | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44 |
| MF180C51-16D | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
| MC80C52XXX-20SB | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CDIP40 |
| MQ80C52CXXX-25SB | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44 |
| MQ83C154DXXX-20/883R | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CQFP44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MS8100 | 制造商:MCC 制造商全稱:Micro Commercial Components 功能描述:8 Amp Schottky Barrier Rectifier 20 to 100 Volts |
| MS8100.D | 制造商:Colibrys SA 功能描述:MEMS CAPACITIVE ACCELEROMETERS - Trays |
| MS8104160 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:(262,214-word x 8-Bits) x 2 Dual FIFO |
| MS8104160A | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Dual FIFO (262,214 Words 】 8 Bits) 】 2 |
| MS8104160A-XXTB | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Dual FIFO (262,214 Words 】 8 Bits) 】 2 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。