參數(shù)資料
型號(hào)： AT90USB646
廠商： Atmel Corp.
英文描述： Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
中文描述： 微控制器與64/128K的ISP字節(jié)閃存和USB控制器
文件頁數(shù)： 60/132頁
文件大?。?/td> 10886K
代理商： AT90USB646
265
8151H–AVR–02/11
ATmega128A
24.13.6
Scanning the ADC
Figure 24-13 shows a block diagram of the ADC with all relevant control and observe signals.
The Boundary-scan cell from Figure 24-8 is attached to each of these signals. The ADC need
not be used for pure connectivity testing, since all analog inputs are shared with a digital port pin
as well.
Figure 24-13. Analog to Digital Converter
The signals are described briefly in Table 24-5.
ACO
Output
Analog Comparator
Output
Will become input
to C code being
executed
0
ACME
Input
Uses output signal
from ADC mux
when true
0
Depends upon C code
being executed
ACBG
Input
Bandgap Reference
enable
0
Depends upon C code
being executed
Table 24-4.
Boundary-scan Signals for the Analog Comparator
Signal
Name
Direction as
Seen from the
Comparator
Description
Recommended
Input when not
in Use
Output values when
Recommended Inputs
are Used
10-bit DAC
+
-
AREF
PRECH
DACOUT
COMP
MUXEN_7
ADC_7
MUXEN_6
ADC_6
MUXEN_5
ADC_5
MUXEN_4
ADC_4
MUXEN_3
ADC_3
MUXEN_2
ADC_2
MUXEN_1
ADC_1
MUXEN_0
ADC_0
NEGSEL_2
ADC_2
NEGSEL_1
ADC_1
NEGSEL_0
ADC_0
EXTCH
+
-
+
-
10x
20x
G10
G20
ST
ACLK
AMPEN
2.56V
ref
IREFEN
AREF
VCCREN
DAC_9..0
ADCEN
HOLD
PRECH
GNDEN
PASSEN
ACTEN
COMP
SCTEST
ADCBGEN
To Comparator
1.22V
ref
AREF
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT90USB646_0607 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
AT90USB646_08 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
AT90USB646_09 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
AT90USB646-16MU 功能描述:8位微控制器 -MCU AVR USB 64K FLASH5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90USB646-AU 功能描述:8位微控制器 -MCU USB 64K FLASH 16 MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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