參數(shù)資料
型號(hào): SPAK56F826BU80
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 數(shù)字信號(hào)處理
英文描述: 16-BIT, 80 MHz, OTHER DSP, PQFP100
封裝: LQFP-100
文件頁(yè)數(shù): 19/53頁(yè)
文件大小: 829K
代理商: SPAK56F826BU80
26
DSP56F826 Preliminary Technical Data
MOTOROLA
Figure 13. Connecting an External Clock Signal
Figure 14. External Clock Timing
Table 12. 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 ≤ 50 pF, fop = 80 MHz
Characteristic
Symbol
Min
Typ
Max
Unit
Frequency of operation (external clock driver)1
1.
See Figure 13 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 6 MHz.
MHz
Clock Pulse Width3, 5
3.
The high or low pulse width must be no smaller than 6.25 ns or the chip will not function.
tPW
6.25
——
ns
External clock input rise time4, 5
4.
External clock input rise time is measured from 10% to 90%.
trise
——
3ns
External clock input fall time5, 5
5.
External clock input fall time is measured from 90% to 10%.
6.
Parameters shown are guaranteed by design.
tfall
——
3ns
DSP56F826
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
tfall
trise
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