поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

Preview PDF HTML

ATmega325P датащи(PDF) 240 Page - ATMEL Corporation

номер детали ATmega325P
подробное описание детали  8-bit Microcontroller with 32K Bytes In-System Programmable Flash
PDF  364 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega325P датащи(HTML) 240 Page - ATMEL Corporation

Back Button ATmega325P Datasheet HTML 236Page - ATMEL Corporation ATmega325P Datasheet HTML 237Page - ATMEL Corporation ATmega325P Datasheet HTML 238Page - ATMEL Corporation ATmega325P Datasheet HTML 239Page - ATMEL Corporation ATmega325P Datasheet HTML 240Page - ATMEL Corporation ATmega325P Datasheet HTML 241Page - ATMEL Corporation ATmega325P Datasheet HTML 242Page - ATMEL Corporation ATmega325P Datasheet HTML 243Page - ATMEL Corporation ATmega325P Datasheet HTML 244Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 240 / 364 page
background image
240
8023F–AVR–07/09
ATmega325P/3250P
• The DAC values must be stable at the midpoint value 0x200 when having the HOLD signal low
(Sample mode).
As an example, consider the task of verifying a 1.5V ± 5% input signal at ADC channel 3 when
the power supply is 5.0V and AREF is externally connected to V
CC.
The recommended values from Table 23-4 are used unless other values are given in the algo-
rithm in Table 23-5. Only the DAC and port pin values of the Scan Chain are shown. The column
“Actions” describes what JTAG instruction to be used before filling the Boundary-scan Register
with the succeeding columns. The verification should be done on the data scanned out when
scanning in the data on the same row in the table.
Using this algorithm, the timing constraint on the HOLD signal constrains the TCK clock fre-
quency. As the algorithm keeps HOLD high for five steps, the TCK clock frequency has to be at
least five times the number of scan bits divided by the maximum hold time, t
hold,max
The lower limit is:
1024 1,5
V 0,95 5V
⁄
⋅⋅
291
0x123
==
The upper limit is:
1024 1,5
V 1,05 5V
⁄
⋅⋅
323
0x143
==
Table 23-5.
Algorithm for Using the ADC
Step
Actions
ADCEN
DAC
MUXEN
HOLD
PRECH
PA3.
Data
PA3.
Control
PA3.
Pull-up_
Enable
1
SAMPLE_PR
ELOAD
1
0x200
0x08
1
1
0
0
0
2
EXTEST
1
0x200
0x08
0
1
0
0
0
3
1
0x200
0x08
1
1
0
0
0
4
1
0x123
0x08
1
1
0
0
0
5
1
0x123
0x08
1
0
0
0
0
6
Verify the
COMP bit
scanned out to
be 0
1
0x200
0x08
1
1
0
0
0
7
1
0x200
0x08
0
1
0
0
0
8
1
0x200
0x08
1
1
0
0
0
9
1
0x143
0x08
1
1
0
0
0
10
1
0x143
0x08
1
0
0
0
0
11
Verify the
COMP bit
scanned out to
be 1
1
0x200
0x08
1
1
0
0
0



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


датащи скачать

Go To PDF Page


ссылки URL



Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   Ссылка на техническое описание    |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com