參數(shù)資料
型號: DSP56F807
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: 16-bit Hybrid Controller(16位混合控制器)
中文描述: 16位混合控制器(16位混合控制器)
文件頁數(shù): 26/52頁
文件大?。?/td> 1124K
代理商: DSP56F807
26
56F807 Technical Data
Figure 10. Connecting a Ceramic Resonator
Note:
Motorola recommends only two terminal ceramic resonators vs. three terminal
resonators (which contain an internal bypass capacitor to ground).
3.5.3
The recommended method of connecting an external clock is given in
Figure 11
. The external clock
source is connected to XTAL and the EXTAL pin is grounded.
External Clock Source
Figure 11. Connecting an External Clock Signal
Figure 12. External Clock Timing
Table 27. 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.
2.
3.
See
Figure 11
for details on using the recommended connection of an external clock driver.
The high or low pulse width must be no smaller than 6.25ns or the chip will not function.
Parameters listed are guaranteed by design.
f
osc
0
80
MHz
Clock Pulse Width
2
,
3
t
PW
6.25
ns
Recommended Ceramic Resonator
Parameters:
R
z
= 1 to 3 M
f
c
= 8MHz (optimized for 8MHz)
EXTAL XTAL
R
z
f
c
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
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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