參數(shù)資料
型號(hào)： KMPC8349VVAJF
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 79/87頁(yè)
文件大小： 0K
描述： IC MPU PWRQUICC II 672-TBGA
標(biāo)準(zhǔn)包裝： 2
系列： MPC83xx
處理器類(lèi)型： 32-位 MPC83xx PowerQUICC II Pro
速度： 533MHz
電壓： 1.2V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 672-LBGA
供應(yīng)商設(shè)備封裝： 672-TBGA（35x35）
包裝： 托盤(pán)
MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13
80
Freescale Semiconductor
System Design Information
2. The e300 core PLL generates the core clock as a slave to the platform clock. The frequency ratio
between the e300 core clock and the platform clock is selected using the e300 PLL ratio
configuration bits as described in Section 19.2, “Core PLL Configuration.”
21.2
PLL Power Supply Filtering
Each PLL gets power through independent power supply pins (AVDD1, AVDD2, respectively). The AVDD
level should always equal to VDD, and preferably these voltages are derived directly from VDD through a
low frequency filter scheme.
There are a number of ways to provide power reliably to the PLLs, but the recommended solution is to
provide four independent filter circuits as illustrated in Figure 42, one to each of the four AVDD pins.
Independent filters to each PLL reduce the opportunity to cause noise injection from one PLL to the other.
The circuit filters noise in the PLL resonant frequency range from 500 kHz to 10 MHz. 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.
To minimize noise coupled from nearby circuits, each circuit should be placed as closely as possible to the
specific AVDD pin being supplied. 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 42 shows the PLL power supply filter circuit.
Figure 42. PLL Power Supply Filter Circuit
21.3
Decoupling Recommendations
Due to large address and data buses and high operating frequencies, the MPC8349EA 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 MPC8349EA
system, and the device itself requires a clean, tightly regulated source of power. Therefore, the system
designer should place at least one decoupling capacitor at each VDD, OVDD, GVDD, and LVDD pin of the
device. These capacitors should receive their power from separate VDD, OVDD, GVDD, LVDD, and GND
power planes in the PCB, with short traces to minimize inductance. Capacitors can be placed directly under
the device using a standard escape pattern. Others can 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, distribute several bulk storage capacitors around the PCB, feeding the VDD, OVDD, GVDD,
and LVDD planes, to enable quick recharging of the smaller chip capacitors. These bulk capacitors should
VDD
AVDD (or L2AVDD)
2.2 F
GND
Low ESL Surface Mount Capacitors
10
Ω
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KMPC8349VVAJFB 功能描述:微處理器 - MPU 8349 TBGA NOPB RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)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(lèi)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
KMPC8349VVALFB 功能描述:微處理器 - MPU 8349 TBGA NOPB RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)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(lèi)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
KMPC8349ZUAGDB 功能描述:微處理器 - MPU 834X TBGA PB RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)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(lèi)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
KMPC8349ZUAJDB 功能描述:微處理器 - MPU 8349 TBGA W/PB RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)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(lèi)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
KMPC8349ZUAJF 功能描述:IC MPU PWRQUICC II 672-TBGA RoHS:否 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:MPC83xx 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類(lèi)型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類(lèi)型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤(pán)
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