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參數(shù)資料
| 型號(hào)： | DSP56852E |
| 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)： | 22/48頁 |
| 文件大?。?/td> | 731K |
| 代理商： | DSP56852E |
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56852 Technical Data, Rev. 8
22
Freescale Semiconductor
4.5.2
The recommended method of connecting an external clock is given in
Figure 4-7
.
The external clock
source is connected to XTAL and the EXTAL pin is held at ground (recommended), V
DDA
, or V
DDA
/2.
The TOD_SEL bit in CGM must be set to 1.
High Speed External Clock Source (> 4MHz)
Figure 4-7 Connecting a High Speed External Clock Signal using XTAL
4.5.3
The recommended method of connecting an external clock is given in
Figure 4-8
.
The external clock
source is connected to XTAL and the EXTAL pin is held at V
DDA
/2. The TOD_SEL bit in CGM may be
set to 0 or 1. 0 is recommended.
Low Speed External Clock Source (2-4MHz)
Figure 4-8 Connecting a Low Speed External Clock Signal using XTAL
Table 4-5 External Clock Operation Timing Requirements
4
Operating Conditions: V
SS
= V
SSIO
= V
SSA
= 0V, 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
Frequency of operation (external clock driver)
1
1.
See
Figure 4-7
for details on using the recommended connection of an external clock driver.
f
osc
0
—
240
MHz
Clock Pulse Width
4
t
PW
6.25
—
—
ns
External clock input rise time
2,
4
2.
External clock input rise time is measured from 10 to 90 percent.
t
rise
—
—
TBD
ns
External clock input fall time
3,
4
3.
External clock input fall time is measured from 90 to 10percent.
4.
Parameters listed are guaranteed by design.
t
fall
—
—
TBD
ns
56852
XTAL
EXTAL
External
Clock
(up to 240MHz)
GND,
V
DDA
,
or V
DDA
/2
56852
XTAL
EXTAL
External
Clock
(2-4MHz)
V
DDA
/2
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| DSP56852EVM | 制造商:Freescale Semiconductor 功能描述:IC's |
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| DSP56852PB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:56852 Digital Signal Processor Product Brief |
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| DSP56852UMAD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DSP56852UM Rev 2.0 Addendum |
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