參數(shù)資料
型號: DSP56F826BU80
廠商: Freescale Semiconductor
文件頁數(shù): 24/56頁
文件大小: 0K
描述: IC DSP 80MHZ 64KB FLASH 100LQFP
標(biāo)準(zhǔn)包裝: 90
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,WDT
輸入/輸出數(shù): 46
程序存儲器容量: 67KB(33.5K x 16)
程序存儲器類型: 閃存
RAM 容量: 4.5K x 16
電壓 - 電源 (Vcc/Vdd): 2.25 V ~ 2.75 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 100-LQFP
包裝: 托盤
56F826 Technical Data, Rev. 14
30
Freescale Semiconductor
3.6.3
External Clock Source
The recommended method of connecting an external clock is given in Figure 3-11. The external clock
source is connected to XTAL and the EXTAL pin is held VDDA/2.
Figure 3-11 Connecting an External Clock Signal
Figure 3-12 External Clock Timing
Table 3-8 External Clock Operation Timing Requirements
Operating Conditions: VSSIO=VSS = VSSA = 0V, VDDA =VDDIO=3.0–3.6V, VDD = 2.25–2.75V, TA = –40° to +85°C, CL ≤ 50pF, fop = 80MHz
Characteristic
Symbol
Min
Typ
Max
Unit
Frequency of operation (external clock driver)1
1. See Figure 3-11 for details on using the recommended connection of an external clock driver.
fosc
04
802
2. When using Time of Day (TOD), maximum external frequency is 6MHz.
MHz
Clock Pulse Width3, 4
3. The high or low pulse width must be no smaller than 6.25ns or the chip will not function.
4. Parameters listed are guaranteed by design.
tPW
6.25
ns
56F826
XTAL
EXTAL
External
VDDA/2
Clock
External
Clock
VIH
VIL
Note: The midpoint is VIL + (VIH – VIL)/2.
90%
50%
10%
90%
50%
10%
tPW
tPW
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