參數(shù)資料
型號(hào)： MC56F8256VLF
廠商： Freescale Semiconductor
文件頁數(shù)： 32/88頁
文件大?。?/td> 0K
描述： DSC 64K FLASH 60MHZ 48-LQFP
標(biāo)準(zhǔn)包裝： 250
系列： 56F8xxx
核心處理器： 56800E
芯體尺寸： 16-位
速度： 60MHz
連通性： CAN，I²C，LIN，SCI，SPI
外圍設(shè)備： LVD，POR，PWM，WDT
輸入/輸出數(shù)： 39
程序存儲(chǔ)器容量： 64KB（32K x 16）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 4K x 16
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x12b，D/A 1x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 105°C
封裝/外殼： 48-LQFP
包裝： 管件
MC56F825x/MC56F824x Digital Signal Controller, Rev. 3
General System Control Information
Freescale Semiconductor
38
when selecting a crystal, because crystal parameters determine the component values required to provide maximum stability
and reliable startup. The load capacitance values used in the oscillator circuit design should include all stray layout capacitances.
The crystal and associated components should be mounted as near as possible to the EXTAL and XTAL pins to minimize output
distortion and startup stabilization time. When using low-frequency, low-power mode, the only external component is the
crystal itself. In the other oscillator modes, load capacitors (Cx, Cy) and feedback resistor (RF) are required. In addition, a series
resistor (RS) may be used in high-gain modes. Recommended component values appear in Table 27.
Figure 9. Typical Crystal Oscillator Circuit without Frequency Compensation Capacitor
Figure 10. Typical Crystal or Ceramic Resonator Circuit
5.4.3
Alternate External Clock Input
The recommended method of connecting an external clock appears in Figure 11. The external clock source is connected to the
CLKIN pin while:
both the EXT_SEL bit and the CLK_MODE bit in the OSCTL register are set, and
corresponding bits in the GPIOB_PER register in the GPIO module and the GPS_C0 bit in the GPS0 register in the
system integration module (SIM) are set to the correct values.
The external clock input must be generated using a relatively low-impedance driver with a maximum frequency not greater than
120 MHz.
EXTAL
XTAL
MC56F825x/MC56F824x
Crystal Frequency = 4–16 MHz
OSC_DIV2 = 1 if 16 MHz is chosen
RF
EXTAL
XTAL
C1
C2
MC56F825x/MC56F824x
Crystal Frequency = 4–16 MHz
OSC_DIV2 = 1 if 16 MHz is chosen
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MC56F8257VLH 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC DSC 64 LQFP 64K FL RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
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