參數(shù)資料
型號： DSP56858FVE
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)字信號控制器
文件頁數(shù)： 24/64頁
文件大小： 956K
代理商： DSP56858FVE
56858 Technical Data, Rev. 6
24
Freescale Semiconductor
4.2 DC Electrical Characteristics
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
Symbol
Value
Unit
144-pin LQFP
144 MAPBGA
Thermal resistance junction-to-ambient
(estimated)
θ
JA
42.9
36.1
°C/W
I/O pin power dissipation
P
I/O
User Determined
W
Power dissipation
P
D
P
D
= (I
DD
x 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
W
Table 4-4 DC Electrical Characteristics
Operating Conditions: V
SS
= V
SSIO
= V
SSA
= 0 V, V
DD
= 1.62-1.98V, V
DDIO
= V
DDA
=
3.0–3.6V, T
A
= –40
°
to +120
°
C, C
L
≤
50pF, f
op
= 120MHz
Characteristic
Symbol
Min
Typ
Max
Unit
Input high voltage (XTAL/EXTAL)
V
IHC
V
DDA
– 0.8
V
DDA
V
DDA
+ 0.3
V
Input low voltage (XTAL/EXTAL)
V
ILC
-0.3
—
0.5
V
Input high voltage
V
IH
2.0
—
5.5
V
Input low voltage
V
IL
-0.3
—
0.8
V
Table 4-2 Recommended Operating Conditions (Continued)
Characteristic
Symbol
Min
Max
Unit
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