參數(shù)資料
型號: DSP56855E
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: 16-bit Digital Signal Controllers
中文描述: 16位數(shù)字信號控制器
文件頁數(shù): 19/52頁
文件大?。?/td> 618K
代理商: DSP56855E
General Characteristics
56855 Technical Data, Rev. 6
Freescale Semiconductor
19
Ambient operating temperature
T
A
-40
85
°C
PLL clock frequency
1
f
pll
240
MHz
Operating Frequency
2
f
op
120
MHz
Frequency of peripheral bus
f
ipb
60
MHz
Frequency of external clock
f
clk
240
MHz
Frequency of oscillator
f
osc
2
4
MHz
Frequency of clock via XTAL
f
xtal
240
MHz
Frequency of clock via EXTAL
f
extal
2
4
MHz
1.
selected. The actual frequency depends on the source clock frequency and programming of the CGM module.
Assumes clock source is direct clock to EXTAL or crystal oscillator running 2-4MHz. PLL must be enabled, locked, and
2.
Master clock is derived from on of the following four sources:
f
clk
= f
xtal
when the source clock is the direct clock to EXTAL
f
clk
= f
pll
when PLL is selected
f
clk
= f
osc
when the source clock is the crystal oscillator and PLL is not selected
f
clk
= f
extal
when the source clock is the direct clock to EXTAL and PLL is not selected
Table 4-3 Thermal Characteristics
1
1.
See
Section 6.1
for more detail.
Characteristic
100-pin LQFP
Symbol
Value
Unit
Thermal resistance junction-to-ambient
(estimated)
θ
JA
41.2
°C/W
I/O pin power dissipation
P
I/O
User Determined
W
Power dissipation
P
D
P
D
= (I
DD
×
V
DD
) + P
I/O
W
Maximum allowed P
D
P
DMAX
(T
J
– T
A
) / R
θ
JA 2
2.
TJ = Junction Temperature
TA = Ambient Temperature
°
C
Table 4-2 Recommended Operating Conditions
Characteristic
Symbol
Min
Max
Unit
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