參數(shù)資料
型號: ATTINY2313A-MUR
廠商: Atmel
文件頁數(shù): 97/172頁
文件大?。?/td> 0K
描述: MCU AVR 2K FLASH 20MHZ 20QFN
產(chǎn)品培訓(xùn)模塊: tinyAVR Introduction
標(biāo)準(zhǔn)包裝: 6,000
系列: AVR® ATtiny
核心處理器: AVR
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 18
程序存儲器容量: 2KB(1K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 128 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 20-WFQFN 裸露焊盤
包裝: 帶卷 (TR)
30
8246B–AVR–09/11
ATtiny2313A/4313
6.2.5
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 6-3 on page 30. 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 6-6 on page 30. For ceramic resonators, the capacitor val-
ues given by the manufacturer should be used.
Figure 6-3.
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 6-6.
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
Table 6-6.
Crystal Oscillator Operating Modes
CKSEL3..1
Frequency Range (MHz)
Recommended Range for Capacitors C1
and C2 for Use with Crystals (pF)
0.4 - 0.9
101
0.9 - 3.0
12 - 22
110
3.0 - 8.0
12 - 22
111
8.0 -
12 - 22
XTAL2
XTAL1
GND
C2
C1
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