參數(shù)資料
型號(hào): MC56603AGC60
廠(chǎng)商: FREESCALE SEMICONDUCTOR INC
元件分類(lèi): 數(shù)字信號(hào)處理
英文描述: 24-BIT, 60 MHz, OTHER DSP, PBGA144
封裝: PLASTIC, BGA-144
文件頁(yè)數(shù): 86/97頁(yè)
文件大?。?/td> 1080K
代理商: MC56603AGC60
DSP56603A
Electrical Design Considerations
MOTOROLA
DSP56603A Technical Data Sheet
4-3
ELECTRICAL DESIGN CONSIDERATIONS
Use the following list of considerations to assure correct DSP operation:
Each VCC pin on the DSP56603A should be provided with a low-impedance
path to the boards supply. Each GND pin should likewise be provided with a
low-impedance path to ground.
The power supply pins drive distinct groups of logic on-chip as shown in
best results, separate VCC and GND for each supply is recommended; each
with a capacitor to bypass VCC to GND as close as possible to the package.
Otherwise, a multi-layer board is recommended, employing two inner layers
as VCC and GND planes.
Two 0.1
mF ceramic capacitors as close as possible to each side of the package
(eight capacitors altogether) should be used to bypass the VCC power supply
layer to the ground layer. In such cases, there is no separation between the
various power and ground supplies, since each one is directly tied to the
appropriate plane. Therefore, the capacitors are common to all the VCC/GND
pairs.
The VCC/GND supplies of the PLL should be well-regulated (non-switching
regulators), and the pins should be provided with an extremely low
impedance path to VCC/GND.
VCCP should be connected to the main power supply with a special power
branch. If required, filtering circuitry should be provided. If VCCP and GNDP
are kept separate from the other supplies, an additional larger capacitor (e.g.,
47
mF) should be used between these pins.
An additional large capacitor should be placed next to the power supply
itself.
CAUTION
This device contains protective circuitry to
guard against damage due to high static
voltage or electrical fields. However, normal
precautions are advised to avoid application
of any voltages higher than maximum rated
voltages
to
this
high-impedance
circuit.
Reliability of operation is enhanced if unused
inputs are tied to an appropriate logic voltage
level (e.g., either GND or VCC).
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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