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参数资料
型号： DSPB56362AG120
厂商： Freescale Semiconductor
文件页数： 15/152页
文件大小： 0K
描述： IC DSP 24BIT AUD 120MHZ 144-LQFP
标准包装： 60
系列： DSP56K/Symphony
类型： 音频处理器
接口： 主机接口，I²C，SAI，SPI
时钟速率： 120MHz
非易失内存： ROM（126 kB）
芯片上RAM： 42kB
电压 - 输入/输出： 3.30V
电压 - 核心： 3.30V
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 144-LQFP
供应商设备封装： 144-LQFP（20x20）
包装： 托盘
Power Consumption Considerations
DSP56362 Technical Data, Rev. 4
Freescale Semiconductor
5-3
Consider all device loads as well as parasitic capacitance due to PCB traces when calculating
capacitance. This is especially critical in systems with higher capacitive loads that could create
higher transient currents in the VCC and GND circuits.
All inputs must be terminated (i.e., not allowed to float) using CMOS levels, except for the pins
with internal pull-up resistors (TRST, TMS, DE, TCK, and TDI).
Take special care to minimize noise levels on the VCCP, GNDP, and GNDP1 pins.
If multiple DSP56362 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 should be supplied
before deassertion of RESET.
At power-up, ensure that the voltage difference between the 5 V tolerant pins and the chip VCC
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
= 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:
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.
Example 1. Current Consumption
For a Port A address pin loaded with 50 pF capacitance, operating at 3.3 V, and with a 100 MHz clock, toggling
at its maximum possible rate (50 MHz), the current consumption is
IC V
×
f
×
=
I50 10
12
–
3.3
×
50 10
6
×
8.25mA
==
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DSPB56362AG120 制造商:Freescale Semiconductor 功能描述:Digital Signal Processor IC DSP Type:Cor
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DSPB56362PV120 制造商:Rochester Electronics LLC 功能描述:DIGITAL AUDIO DSP - Bulk
DSPB56364AF100 功能描述:数字信号处理器和控制器 - DSP, DSC DSP56364 RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT
DSPB56364FU100 制造商:Rochester Electronics LLC 功能描述:24 BIT AUDIO DSP - Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述:
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