- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄25624 > MQ80C52EXXX-25:R (ATMEL CORP) 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44 PDF資料下載
參數(shù)資料
| 型號(hào)： | MQ80C52EXXX-25:R |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44 |
| 封裝： | CERAMIC, QFP-44 |
| 文件頁數(shù)： | 31/83頁 |
| 文件大?。?/td> | 8336K |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁當(dāng)前第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁
29
8021G–AVR–03/11
ATmega329P/3290P
8.4
Crystal Oscillator
XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier which can be con-
figured for use as an On-chip Oscillator, as shown in Figure 8-2. Either a quartz crystal or a
ceramic resonator may be used.
C1 and C2 should always be equal for both crystals and resonators. The optimal value of the
capacitors depends on the crystal or resonator in use, the amount of stray capacitance, and the
electromagnetic noise of the environment. Some initial guidelines for choosing capacitors for
use with crystals are given in Table 8-3. For ceramic resonators, the capacitor values given by
the manufacturer should be used.
Figure 8-2.
Crystal Oscillator Connections
The Oscillator can operate in three different modes, each optimized for a specific frequency
range. The operating mode is selected by the fuses CKSEL3..1 as shown in Table 8-3.
Note:
1. This option should not be used with crystals, only with ceramic resonators.
The CKSEL0 Fuse together with the SUT1...0 Fuses select the start-up times as shown in Table
8-4.
Table 8-3.
Crystal Oscillator Operating Modes
CKSEL3..1
Frequency Range
(MHz)
Recommended Range for Capacitors C1 and
C2 for Use with Crystals (pF)
100(1)
0.4 - 0.9
–
101
0.9 - 3.0
12 - 22
110
3.0 - 8.0
12 - 22
111
8.0 -
12 - 22
Table 8-4.
Start-up Times for the Crystal Oscillator Clock Selection
CKSEL0
SUT1..0
Start-up Time from
Power-down and
Power-save
Additional Delay
from Reset
(V
CC = 5.0V)
Recommended Usage
0
00
258 CK(1)
14CK + 4.1ms
Ceramic resonator, fast
rising power
0
01
258 CK(1)
14CK + 65ms
Ceramic resonator,
slowly rising power
010
1K CK(2)
14CK
Ceramic resonator,
BOD enabled
XTAL2
XTAL1
GND
C2
C1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MR80C32-12P883 | 8-BIT, 12 MHz, MICROCONTROLLER, CQCC44 |
| MC80C32-36SHXXX | 8-BIT, 36 MHz, MICROCONTROLLER, CDIP40 |
| MQ80C32-20:RD | 8-BIT, 20 MHz, MICROCONTROLLER, CQFP44 |
| MQ80C52TXXX-16SHXXX:RD | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44 |
| MC80C52TXXX-12 | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CDIP40 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MQ82370-20 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MQ8238020 | 制造商:Intel 功能描述:CONTROLLER: OTHER |
| MQ82380-20 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MQ82380-20/R | 制造商:Rochester Electronics LLC 功能描述: |
| MQ82592 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。