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參數(shù)資料
| 型號： | DSP56366P |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | 24-Bit Audio Digital Signal Processor |
| 中文描述： | 24位音頻數(shù)字信號處理器 |
| 文件頁數(shù)： | 99/110頁 |
| 文件大?。?/td> | 1273K |
| 代理商： | DSP56366P |
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DSP56366 Technical Data, Rev. 3.1
Freescale Semiconductor
5-3
Take special care to minimize noise levels on the V
CCP
and GND
P
pins.
If multiple DSP56366 devices are on the same board, check for cross-talk or excessive spikes on
the supplies due to synchronous operation of the devices.
RESET must be asserted when the chip is powered up. A stable EXTAL signal must be supplied
while RESET is being asserted.
At power-up, ensure that the voltage difference between the 5 V tolerant pins and the chip V
CC
never exceeds 3.95 V.
5.3
Power Consumption Considerations
Power dissipation is a key issue in portable DSP applications. Some of the factors which affect current
consumption are described in this section. Most of the current consumed by CMOS devices is alternating
current (ac), which is charging and discharging the capacitances of the pins and internal nodes.
Current consumption is described by the following formula:
where:
C
V
f
= node/pin capacitance
= voltage swing
= frequency of node/pin toggle
The maximum internal current (I
CCI
max) value reflects the typical possible switching of the internal buses
on best-case operation conditions, which is not necessarily a real application case. The typical internal
current (I
CCItyp
) value reflects the average switching of the internal buses on typical operating conditions.
For applications that require very low current consumption, do the following:
Set the EBD bit when not accessing external memory.
Minimize external memory accesses and use internal memory accesses.
Minimize the number of pins that are switching.
Minimize the capacitive load on the pins.
Connect the unused inputs to pull-up or pull-down resistors.
Disable unused peripherals.
One way to evaluate power consumption is to use a current per MIPS measurement methodology to
minimize specific board effects (i.e., to compensate for measured board current not caused by the DSP).
A benchmark power consumption test algorithm is listed in
Appendix A
. Use the test algorithm, specific
test current measurements, and the following equation to derive the current per MIPS value.
Example 1. Current Consumption
For a Port A address pin loaded with 50 pF capacitance, operating at 3.3 V, and with a 120
MHz clock, toggling at its maximum possible rate (60 MHz), the current consumption is
I
C
V
×
f
×
=
I
50
10
12
–
3.3
60
10
6
9.9mA
=
×
×
×
×
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DSP56366UM | 24-Bit Audio Digital Signal Processor |
| DSP56367P | 24-Bit Audio Digital Signal Processor |
| DSP56367UM | 24-Bit Audio Digital Signal Processor |
| DSP56600 | Implementing Viterbi Decoders Using the VSL Instruction on DSP Families |
| DSP56852E | 16-bit Digital Signal Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DSP56366UM | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:24-Bit Audio Digital Signal Processor |
| DSP56367 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| DSP56367P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:24-Bit Audio Digital Signal Processor |
| DSP56367UM | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:24-Bit Audio Digital Signal Processor |
| DSP56371 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:high density CMOS device |
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