參數(shù)資料
型號: MC56F8023VLC
廠商: Freescale Semiconductor
文件頁數(shù): 85/157頁
文件大?。?/td> 0K
描述: IC DSP 16BIT DUAL HARV 32-LQFP
標準包裝: 1,250
系列: 56F8xxx
核心處理器: 56800E
芯體尺寸: 16-位
速度: 32MHz
連通性: I²C,LIN,SCI,SPI
外圍設備: POR,PWM,WDT
輸入/輸出數(shù): 26
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: 閃存
RAM 容量: 2K x 16
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數(shù)據(jù)轉換器: A/D 6x12b; D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 105°C
封裝/外殼: 32-LQFP
包裝: 托盤
Ceramic Resonator
56F8033/56F8023 Data Sheet, Rev. 6
Freescale Semiconductor
33
Figure 3-1 External Crystal Oscillator Circuit
3.6 Ceramic Resonator
The internal crystal oscillator circuit is also designed to interface with a ceramic resonator in the frequency
range of 4-8MHz. Figure 3-2 shows the typical 2- and 3-terminal ceramic resonators and their circuits.
Follow the resonator supplier’s recommendations when selecting a resonator, since their parameters
determine the component values required to provide maximum stability and reliable start up. The load
capacitance values used in the resonator circuit design should include all stray layout capacitances. The
resonator and associated components should be mounted as near as possible to the EXTAL and XTAL pins
to minimize output distortion and start-up stabilization time.
Figure 3-2 External Ceramic Resonator Circuit
3.7 External Clock Input - Crystal Oscillator Option
The recommended method of connecting an external clock is illustrated in Figure 3-3. The external clock
source is connected to XTAL and the EXTAL pin is grounded. The external clock input must be generated
using a relatively low impedance driver.
Sample External Crystal Parameters:
Rz = 750 KΩ
Note: If the operating temperature range is limited to
below 85oC (105oC junction), then Rz = 10 Meg Ω
EXTAL XTAL
Rz
CL1
CL2
Crystal Frequency = 4 - 8MHz (optimized for 8MHz)
EXTAL XTAL
Rz
EXTAL XTAL
Rz
Sample External Ceramic Resonator Parameters:
Rz = 750 KΩ
EXTAL XTAL
Rz
C1
CL1
CL2
C2
Resonator Frequency = 4 - 8MHz (optimized for 8MHz)
3 Terminal
2 Terminal
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