參數(shù)資料
型號: DSP56F805FV80E
廠商: Freescale Semiconductor
文件頁數(shù): 24/56頁
文件大?。?/td> 0K
描述: IC DSP 80MHZ 64KB FLASH 144LQFP
標(biāo)準(zhǔn)包裝: 60
系列: 56F8xx
核心處理器: 56800
芯體尺寸: 16-位
速度: 80MHz
連通性: CAN,EBI/EMI,SCI,SPI
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 71KB(35.5K x 16)
程序存儲器類型: 閃存
RAM 容量: 2.5K 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: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 144-LQFP
包裝: 托盤
56F805 Technical Data, Rev. 16
30
Freescale Semiconductor
3.5.3
External Clock Source
The recommended method of connecting an external clock is given in Figure 3-9. The external clock
source is connected to XTAL and the EXTAL pin is grounded.
Figure 3-9 Connecting an External Clock Signal
Figure 3-10 External Clock Timing
Table 3-8 External Clock Operation Timing Requirements3
Operating Conditions: V
SS = VSSA = 0 V, VDD = VDDA = 3.0–3.6V, TA = –40° to +85°C
Characteristic
Symbol
Min
Typ
Max
Unit
Frequency of operation (external clock driver)1
1.
See Figure 3-9 for details on using the recommended connection of an external clock driver.
fosc
0—
80
MHz
Clock Pulse Width2, 5
2.
The high or low pulse width must be no smaller than 6.25ns or the chip will not function. However, the high pulse width
does not have to be any particular percent of the low pulse width.
3.
Parameters listed are guaranteed by design.
tPW
6.25
ns
56F805
XTAL
EXTAL
External
VSS
Clock
External
Clock
VIH
VIL
Note: The midpoint is VIL + (VIH – VIL)/2.
90%
50%
10%
90%
50%
10%
tPW
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