參數(shù)資料
型號(hào)： DSP56F827FG80E
廠商： Freescale Semiconductor
文件頁數(shù)： 24/60頁
文件大?。?/td> 0K
描述： IC HYBRID CTRLR 16BIT 128-LQFP
標(biāo)準(zhǔn)包裝： 72
系列： 56F8xx
核心處理器： 56800
芯體尺寸： 16-位
速度： 80MHz
連通性： EBI/EMI，SCI，SPI，SSI
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 64
程序存儲(chǔ)器容量： 136KB（68K x 16）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 5K x 16
電壓 - 電源 (Vcc/Vdd)： 2.25 V ~ 2.75 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x12b
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 128-LQFP
包裝： 托盤
56F827 Technical Data, Rev. 12
30
Freescale Semiconductor
Figure 3-8 Flash Mass Erase Cycle
3.6 External Clock Operation
The 56F827 system clock can be derived from a crystal or an external system clock signal. To generate a
reference frequency using the internal oscillator, a reference crystal must be connected between the
EXTAL and XTAL pins.
3.6.1
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 3-8. A recommended crystal oscillator circuit
is shown in Figure 3-9. Follow the crystal supplier’s recommendations when selecting a crystal, because
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 56F82x
oscillator circuitry is designed to have no external load capacitors present. As shown in Figure 3-9, no
external load capacitors should be used.
The 56F80x components internally are modeled as a parallel resonant oscillator circuit to provide a
capacitive load on each of the oscillator pins (XTAL and EXTAL) of 10pF to 13pF over temperature and
process variations. Using a typical value of internal capacitance on these pins of 12pF and a value of 3pF
XADR
YE=SE=OE=0
ERASE
NVSTR
Tnvs
Tnvh1
Trcv
Tme
MAS1
IFREN
XE
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