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參數(shù)資料
| 型號(hào)： | DSP56F801FA80E |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 16/48頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DSP 60MHZ 16KB FLASH 48-LQFP |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 系列： | 56F8xx |
| 核心處理器： | 56800 |
| 芯體尺寸： | 16-位 |
| 速度： | 80MHz |
| 連通性： | SCI，SPI |
| 外圍設(shè)備： | POR，PWM，WDT |
| 輸入/輸出數(shù)： | 11 |
| 程序存儲(chǔ)器容量： | 20KB（10K x 16） |
| 程序存儲(chǔ)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(zhuǎn)換器： | A/D 8x12b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 48-LQFP |
| 包裝： | 托盤 |
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External Clock Operation
56F801 Technical Data, Rev. 17
Freescale Semiconductor
23
Figure 3-6 Flash Mass Erase Cycle
3.5 External Clock Operation
The 56F801 device clock is derived from either 1) an internal crystal oscillator circuit working in
conjunction with an external crystal, 2) an external frequency source, or 3) an on-chip relaxation oscillator.
To generate a reference frequency using the internal crystal oscillator circuit, a reference crystal external
these methods of clocking. Whichever type of clock derivation is used provides a reference signal to a
phase-locked loop (PLL) within the 56F801. In turn, the PLL generates a master reference frequency that
determines the speed at which chip operations occur.
Application code can be set to change the frequency source between the relaxation oscillator and crystal
oscillator or external source, and power down the relaxation oscillator if desired. Selection of which clock
is used is determined by setting the PRECS bit in the PLLCR (phase-locked loop control register) word
(bit 2). If the bit is set to 1, the external crystal oscillator circuit is selected. If the bit is set to 0, the internal
relaxation oscillator is selected, and this is the default value of the bit when power is first applied.
3.5.1
Crystal Oscillator
The internal oscillator is also designed to interface with a parallel-resonant crystal resonator in the
frequency range specified for the external crystal in Table 3-10. Figure 3-7 shows a recommended crystal
oscillator circuit. Follow the crystal supplier’s recommendations when selecting a crystal, since crystal
parameters determine the component values required to provide maximum stability and reliable start-up.
The crystal and associated components should be mounted as close as possible to the EXTAL and XTAL
pins to minimize output distortion and start-up stabilization time. The internal 56F80x oscillator circuitry
XADR
YE=SE=OE=0
ERASE
NVSTR
Tnvs
Tnvh1
Trcv
Tme
MAS1
IFREN
XE
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DSP56F801FA80E | 制造商:Freescale Semiconductor 功能描述:IC |
| DSP56F801PB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-bit Digital Signal Processor |
| DSP56F802 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers |
| DSP56F802PB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:56F802 16-Bit Hybrid Controller Product Brief |
| DSP56F802TA60 | 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 60Mhz/30MIPS 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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