- 您现在的位置：买卖IC网 > PDF目录175506 > I5104XY (WINBOND ELECTRONICS CORP) 262.2 SEC, SPEECH SYNTHESIZER WITH RCDG, UUC25 PDF资料下载
参数资料
| 型号： | I5104XY |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 音频合成 |
| 英文描述： | 262.2 SEC, SPEECH SYNTHESIZER WITH RCDG, UUC25 |
| 封装： | DIE-25 |
| 文件页数： | 85/87页 |
| 文件大小： | 616K |
| 代理商： | I5104XY |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页当前第85页第86页第87页
87
8393B-MCU Wireless-02/13
ATmega256/128/64RFR2
oscillator should be selected carefully and the related board layout should be done with
caution as described in section "Application Circuits" on page 540.
The register XOSC_CTRL provides access to the control signals of the oscillator. Two
operating modes are supported. It is recommended to use the integrated oscillator
setup as described in Figure 9-26 below. Nevertheless a reference frequency can be
fed to the internal circuitry by using an external clock reference as shown in Figure 9-27
9.6.5.2 Integrated Oscillator Setup
The output frequency of the internal oscillator depends on the load capacitance
between the crystal pins XTAL1 and XTAL2. The total load capacitance CL must be
equal to the specified load capacitance of the crystal itself. It consists of the external
capacitors CX and parasitic capacitances connected to the XTAL nodes.
The following figure shows all parasitic capacitances, such as PCB stray capacitances
and the pin input capacitance summarized to CPAR.
Figure 9-26. Simplified XOSC Schematic with External Components
CX
16MHz
XTAL2
XTAL1
EVDD
CTRIM
CPAR
IC internal
PCB
XTAL_TRIM[3:0]
EVDD
VEVDD
XTAL_TRIM[3:0]
Additional internal trimming capacitors CTRIM are available. Any value in the range from
0 pF to 4.5 pF with a 0.3 pF resolution is selectable using XTAL_TRIM of register
XOSC_CTRL. To calculate the total load capacitance, the following formula can be
used
CL = 0.5 (CX + CTRIM + CPAR).
The trimming capacitors provide the possibility to reduce frequency deviations caused
by variations of the production process or by tolerances of external components. Note
that the oscillation frequency can only be reduced by increasing the trimming
capacitance. The frequency deviation caused by one step of CTRIM decreases with
increasing values of the crystal load capacitor.
An amplitude control circuit is included to ensure stable operation under different
operating conditions and for different crystal types. Enabling the crystal oscillator after
leaving SLEEP state causes a slightly higher current during the amplitude build-up
phase to guarantee a short start-up time. The current is reduced to the amount
相关PDF资料 |
PDF描述 |
|---|---|
| IA3-1206WA00D5 | 0 MHz - 18000 MHz RF/MICROWAVE FIXED ATTENUATOR |
| IA3-0706SS58D0 | 0 MHz - 18000 MHz RF/MICROWAVE FIXED ATTENUATOR |
| IA3-2010SG30D0 | 0 MHz - 18000 MHz RF/MICROWAVE FIXED ATTENUATOR |
| IAC-0706SG04D0 | 0 MHz - 18000 MHz RF/MICROWAVE FIXED ATTENUATOR |
| IAC-0706SS22D0 | 0 MHz - 18000 MHz RF/MICROWAVE FIXED ATTENUATOR |
相关代理商/技术参数 |
参数描述 |
|---|---|
| I5108E | 制造商:WINBOND 制造商全称:Winbond 功能描述:SINGLE-CHIP 1 TO 16 MINUTES DURATION VOICE RECORD/PLAYBACK DEVICES WITH DIGITAL STORAGE CAPABILITY |
| I5108EI | 制造商:WINBOND 制造商全称:Winbond 功能描述:SINGLE-CHIP 1 TO 16 MINUTES DURATION VOICE RECORD/PLAYBACK DEVICES WITH DIGITAL STORAGE CAPABILITY |
| I5108S | 制造商:WINBOND 制造商全称:Winbond 功能描述:SINGLE-CHIP 1 TO 16 MINUTES DURATION VOICE RECORD/PLAYBACK DEVICES WITH DIGITAL STORAGE CAPABILITY |
| I5108SI | 制造商:WINBOND 制造商全称:Winbond 功能描述:SINGLE-CHIP 1 TO 16 MINUTES DURATION VOICE RECORD/PLAYBACK DEVICES WITH DIGITAL STORAGE CAPABILITY |
| I5108X | 制造商:WINBOND 制造商全称:Winbond 功能描述:SINGLE-CHIP 1 TO 16 MINUTES DURATION VOICE RECORD/PLAYBACK DEVICES WITH DIGITAL STORAGE CAPABILITY |
发布紧急采购，3分钟左右您将得到回复。