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參數(shù)資料
| 型號(hào)： | TSPC603RVGSB/Q14LC |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 300 MHz, RISC PROCESSOR, CBGA255 |
| 封裝： | 21 X 21 MM, 3.84 MM HEIGHT, 1.27 MM PITCH, CERAMIC, CI-CGA-255 |
| 文件頁(yè)數(shù)： | 44/132頁(yè) |
| 文件大?。?/td> | 10886K |
| 代理商： | TSPC603RVGSB/Q14LC |
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210
ATmega8535(L)
2502K–AVR–10/06
The ADC module contains a prescaler, which generates an acceptable ADC clock fre-
quency 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 con-
version starts at the following rising edge of the ADC clock cycle. See “Differential Gain
Channels” on page 212 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
conversion and 13.5 ADC clock cycles after the start of an first conversion. When a con-
version 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 two ADC clock cycles after the rising edge on the trigger
source signal. Three additional CPU clock cycles are used for synchronization logic.
In Free Running mode, a new conversion will be started immediately after the conver-
sion completes, while ADSC remains high. For a summary of conversion times, see
Figure 101. ADC Timing Diagram, First Conversion (Single Conversion Mode)
MSB of Result
LSB of Result
ADC Clock
ADSC
Sample & Hold
ADIF
ADCH
ADCL
Cycle Number
ADEN
1
212
13
14
15
16
17
18
19
20
21
22
23
24
25
1
2
First Conversion
Next
Conversion
3
MUX and REFS
Update
MUX and REFS
Update
Conversion
Complete
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSPC603RVGSU/T10LC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC |
| TSPC603RVGSU/T12LC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC |
| TSPC603RVGSU/T14LC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC |
| TSPC603RVGSU/T6LC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC |
| TSPC603RVGSU/T8LC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC |
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