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| 型号： | R5F2L3AACDFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100 |
| 文件页数： | 23/74页 |
| 文件大小： | 959K |
| 代理商： | R5F2L3AACDFP |
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30
2588F–AVR–06/2013
ATtiny261/461/861
6.2.6
Crystal Oscillator / Ceramic Resonator
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 6-4. Either a quartz crystal or a
ceramic resonator may be used.
Figure 6-4.
Crystal Oscillator Connections
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 6-11. For ceramic resonators, the capacitor values given by
the manufacturer should be used.
Notes:
1. This option should not be used with crystals, only with ceramic resonators.
The Oscillator can operate in three different modes, each optimized for a specific frequency
range. The operating mode is selected by fuses CKSEL3:1 as shown in Table 6-11.
The CKSEL0 Fuse together with the SUT1:0 Fuses select the start-up times as shown in Table
6-12.
Table 6-11.
Crystal Oscillator Operating Modes
CKSEL3:1
Frequency Range (MHz)
Recommended C1 and C2 Value (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 6-12.
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
(VCC = 5.0V)
Recommended Usage
0
00
258 CK(1)
14CK + 4 ms
Ceramic resonator,
fast rising power
0
01
258 CK(1)
14CK + 64 ms
Ceramic resonator,
slowly rising power
0
10
1K (1024) CK(2)
14CK
Ceramic resonator,
BOD enabled
XTAL2
XTAL1
GND
C2
C1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R5F2L3AACDFP#U1 | 制造商:Renesas Electronics Corporation 功能描述: |
| R5F2L3AACDFP#V0 | 制造商:Renesas Electronics Corporation 功能描述:R8C/L3AC 96K+4K/10K 100LQFP14X14 -40-+85 - Trays |
| R5F2L3AACNFA#U0 | 制造商:Renesas Electronics Corporation 功能描述:R8CL3AC 96+4KB 1.8/5.5V -20 TO 85C 100QFP - Trays 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 96KB FLASH 100LQFP |
| R5F2L3AACNFP#30 | 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 96KB FLASH 100LQFP 制造商:Renesas Electronics Corporation 功能描述:R8C Series 16 bit 10 kB RAM 96 kB Flash Single Chip Microcontroller SMT-LQFP-100 |
| R5F2L3AACNFP#V0 | 功能描述:MCU 1KB FLASH 96K ROM 100-LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/Lx/3AC 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN，SCI，SPI 外围设备:POR，PWM，温度传感器，WDT 输入/输出数:21 程序存储器容量:40KB（20K x 16） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
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