參數(shù)資料
型號(hào): DSP56F807VF80E
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: 16-bit Digital Signal Controllers
中文描述: 16位數(shù)字信號(hào)控制器
文件頁數(shù): 31/60頁
文件大小: 522K
代理商: DSP56F807VF80E
External Clock Operation
56F807 Technical Data Technical Data, Rev. 15
Freescale Semiconductor
31
3.4.3
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.
External Clock Source
Figure 3-9 Connecting an External Clock Signal
Figure 3-10 External Clock Timing
Table 3-8 External Clock Operation Timing Requirements
5
Operating Conditions:
V
SS
= V
SSA
= 0 V, V
DD
= V
DDA
= 3.0–3.6 V, T
A
= –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.
f
osc
0
80
MHz
Clock Pulse Width
2
,
3
2.
The high or low pulse width must be no smaller than 6.25ns or the chip will not function.
3. Parameters listed are guaranteed by design.
t
PW
6.25
ns
56F807
XTAL
EXTAL
External
Clock
V
SS
External
Clock
V
IH
V
IL
Note: The midpoint is V
IL
+ (V
IH
– V
IL
)/2.
90%
50%
10%
90%
50%
10%
t
PW
t
PW
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