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參數(shù)資料
| 型號： | DSPB56371AF150 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 62/68頁 |
| 文件大小： | 0K |
| 描述： | IC DSP 24BIT 150MHZ 80-LQFP |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 系列： | DSP56K/Symphony |
| 類型： | 音頻處理器 |
| 接口： | 主機(jī)接口，I²C，SAI，SPI |
| 時鐘速率： | 150MHz |
| 非易失內(nèi)存： | ROM（384 kB） |
| 芯片上RAM： | 264kB |
| 電壓 - 輸入/輸出： | 3.30V |
| 電壓 - 核心： | 1.25V |
| 工作溫度： | -40°C ~ 115°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 80-LQFP |
| 供應(yīng)商設(shè)備封裝： | 80-LQFP（14x14） |
| 包裝： | 托盤 |
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Electrical Design Considerations
DSP56371 Data Sheet, Rev. 4.1
Freescale Semiconductor
65
At power-up, ensure that the voltage difference between the 3.3 V tolerant pins and the chip VCC
never exceeds a 3.00 V.
21.1 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:
Eqn. 6
where
C=node/pin capacitance
V=voltage swing
f=frequency of node/pin toggle
The maximum internal current (ICCImax) 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 (ICCItyp) value reflects the average switching of the internal buses on typical operating conditions.
For applications that require very low current consumption, do the following:
Minimize the number of pins that are switching.
Minimize the capacitive load on the pins.
One way to evaluate power consumption is to use a current per MIPS measurement methodology to
minimize specific board effects (for example, to compensate for measured board current not caused by the
DSP). Use the test algorithm, specific test current measurements, and the following equation to derive the
current per MIPS value.
I/MIPS = I/MHz = (ItypF2 - ItypF1)/(F2 - F1)
Eqn. 8
where :
ItypF2=current at F2
ItypF1=current at F1
F2=high frequency (any specified operating frequency)
F1=low frequency (any specified operating frequency lower than F2)
NOTE
F1 should be significantly less than F2. For example, F2 could be 66 MHz and F1 could be
33 MHz. The degree of difference between F1 and F2 determines the amount of precision
with which the current rating can be determined for an application.
Power Consumption Example
For a GPIO address pin loaded with 50 pF capacitance, operating at 3.3 V, and with a 150 MHz clock, toggling at
its maximum possible rate (75 MHz), the current consumption is
Eqn. 7
IC
V
×
f
×
=
I
50x10 12
–
x
3.3x75x106
12.375mA
==
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| DSPB56371AF180 | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC BLANK ROM VERSION 56371 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
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| DSPB56374AEB | 制造商:Freescale Semiconductor 功能描述:52 LQFP PB-FREE W/ BI - Bulk |
| DSPB56374AEC | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 52 LQFP AUTOMOTIVE RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
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