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參數(shù)資料
| 型號： | MPC8306VMABDCA |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 133 MHz, RISC PROCESSOR, PBGA369 |
| 封裝： | 19 X 19 MM, 1.61 MM HEIGHT, 0.80 MM PITCH, LEAD FREE, MAPBGA-369 |
| 文件頁數(shù)： | 69/76頁 |
| 文件大?。?/td> | 474K |
| 代理商： | MPC8306VMABDCA |
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MPC8306 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0
Freescale Semiconductor
71
System Design Information
24.2
PLL Power Supply Filtering
Each of the PLLs listed above is provided with power through independent power supply pins. The voltage
level at each AVDDn pin should always be equivalent to VDD, and preferably these voltages are derived
directly from VDD through a low frequency filter scheme such as the following.
There are a number of ways to reliably provide power to the PLLs, but the recommended solution is to
provide independent filter circuits as illustrated in Figure 43, one to each of the three AVDD pins. By
providing independent filters to each PLL the opportunity to cause noise injection from one PLL to the
other is reduced.
This circuit is intended to filter noise in the PLLs resonant frequency range from a 500 kHz to 10 MHz
range. It should be built with surface mount capacitors with minimum effective series inductance (ESL).
Consistent with the recommendations of Dr. Howard Johnson in High Speed Digital Design: A Handbook
of Black Magic (Prentice Hall, 1993), multiple small capacitors of equal value are recommended over a
single large value capacitor.
Each circuit should be placed as close as possible to the specific AVDD pin being supplied to minimize
noise coupled from nearby circuits. It should be possible to route directly from the capacitors to the AVDD
pin, which is on the periphery of package, without the inductance of vias.
Figure 43 shows the PLL power supply filter circuit.
Figure 43. PLL Power Supply Filter Circuit
24.3
Decoupling Recommendations
Due to large address and data buses, and high operating frequencies, the MPC8306 can generate transient
power surges and high frequency noise in its power supply, especially while driving large capacitive loads.
This noise must be prevented from reaching other components in the MPC8306 system, and MPC8306
itself requires a clean, tightly regulated source of power. Therefore, it is recommended that the system
designer place at least one decoupling capacitor at each VDD, OVDD, and GVDD pins of the MPC8306.
These decoupling capacitors should receive their power from separate VDD, OVDD, GVDD, and GND
power planes in the PCB, utilizing short traces to minimize inductance. Capacitors may be placed directly
under the device using a standard escape pattern. Others may surround the part.
These capacitors should have a value of 0.01 or 0.1 F. Only ceramic SMT (surface mount technology)
capacitors should be used to minimize lead inductance, preferably 0402 or 0603 sizes.
In addition, it is recommended that there be several bulk storage capacitors distributed around the PCB,
feeding the VDD, OVDD, and GVDD planes, to enable quick recharging of the smaller chip capacitors.
These bulk capacitors should have a low ESR (equivalent series resistance) rating to ensure the quick
response time necessary. They should also be connected to the power and ground planes through two vias
VDD
AVDD
2.2 F
GND
Low ESL Surface Mount Capacitors (<0.5 nH)
10
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPC8306VMACDC | 制造商:Freescale Semiconductor 功能描述:MPC8306VMACDC - Bulk |
| MPC8306VMACDCA | 功能描述:微處理器 - MPU E300 MP 200 RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| MPC8306VMADDC | 制造商:Freescale Semiconductor 功能描述:MPC8306VMADDC - Bulk |
| MPC8306VMADDCA | 功能描述:微處理器 - MPU E300 MP 266 RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| MPC8306VMADDCA | 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MPU 266 MHz 369-LFBGA |
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