參數(shù)資料
型號: MB91340PMT
元件分類: 微控制器/微處理器
英文描述: 32-BIT, MROM, 66 MHz, RISC MICROCONTROLLER, PQFP176
封裝: PLASTIC, LQFP-176
文件頁數(shù): 112/126頁
文件大?。?/td> 1501K
代理商: MB91340PMT
MB91340/MB91V340
86
15. A/D Converter (Successive Approximation Type)
The A/D converter converts analog input voltages to digital values.
A/D Converter Features
Minimum conversion time 5.4
s/ch (for machine clock = 33 MHz-CLKP)
Internal sample & hold circuit
Resolution
= 10-bit ( 8-bit accuracy)
8 program-selectable analog inputs
Single conversion mode : Convert 1 specified channel
Scan conversion mode : ontinuous conversion of multiple channels. Conversion can be specified for up to
8 channels.
Single, continuous, and stop conversion operation is supported.
Single mode: Convert specified channel then stop.
Continuous conversion mode: Perform continuous conversion for the selected channel.
Stop conversion mode: Perform conversion for one channel, then wait for the next activation
trigger (synchronizes the conversion start timing)
DMA transfer can be initiated by an interrupt.
Selectable conversion activation trigger: Software, external trigger (falling edge), or reload timer (rising edge)
Block Diagram
AVCC
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AVRH
AVSS
R
|
B
U
S
Input
switch
Sample & hold circuit
Channel decoder
Internal voltage
generator
Successive
approximation register
Data register
(ADCR : 10 bit)
A/D control register
(ADCS)
ATG (External pin trigger)
Reload timer ch2
(internal connection)
Timing generation circuit
Prescaler
Machine clock
φ (CLKP)
Data register
(ADCR0 to 7 : 8 bit)
Upper 8 bit COPY
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