전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

AT90SCR100 데이터시트(PDF) 37 Page - ATMEL Corporation

부품명 AT90SCR100
상세설명  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 데이터시트(HTML) 37 Page - ATMEL Corporation

Back Button AT90SCR100 Datasheet HTML 33Page - ATMEL Corporation AT90SCR100 Datasheet HTML 34Page - ATMEL Corporation AT90SCR100 Datasheet HTML 35Page - ATMEL Corporation AT90SCR100 Datasheet HTML 36Page - ATMEL Corporation AT90SCR100 Datasheet HTML 37Page - ATMEL Corporation AT90SCR100 Datasheet HTML 38Page - ATMEL Corporation AT90SCR100 Datasheet HTML 39Page - ATMEL Corporation AT90SCR100 Datasheet HTML 40Page - ATMEL Corporation AT90SCR100 Datasheet HTML 41Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 37 / 433 page
background image
37
TPR0327AY–SMS–30Jan09
AT90SCR100
Figure 7-4.
Programming PLL
7.2.5
Internal RC Oscillator
By default, the Internal RC Oscillator provides an approximate 8 MHz clock. Though voltage and
temperature dependent, this clock can be very accurately calibrated by the user. See Table 31-2
on page 411 and “Internal RC Oscillator Speed” on page 38 for more details.
This oscillator is used to time Eeprom and Flash write accesses. This is why its calibration is
important.
During reset, hardware loads the pre-programmed calibration value into the OSCCAL Register
and thereby automatically calibrates the RC Oscillator. The accuracy of this calibration is shown
as Factory calibration in Table 31-2 on page 411.
By changing the OSCCAL register from SW, see “OSCCAL – Oscillator Calibration Register” on
page 39, it is possible to get a higher calibration accuracy than by using the factory calibration.
The accuracy of this calibration is shown as User calibration in Table 31-2 on page 411.
Switch clk
to clk
PLLCR.PLLMUX = 1
MUX
PLL
Configure CPU Divider
CLKPR = xxxxb
Enable PLL
PLLCR.ON = 1
No
Yes
Is PLL Locked ?
PLLCR.LOCK = 1 ?
PLL Programming



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


데이터시트 다운로드

Go To PDF Page


링크 URL



ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크 투 데이터시트    |   링크교환   |   제조사별 검색
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