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PPC440EPX-SPAFFFTS 参数 Datasheet PDF下载

PPC440EPX-SPAFFFTS图片预览
型号: PPC440EPX-SPAFFFTS
PDF下载: 下载PDF文件 查看货源
内容描述: 440EPx的PowerPC嵌入式处理器 [PowerPC 440EPx Embedded Processor]
分类和应用: PC
文件页数/大小: 94 页 / 3193 K
品牌: AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
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Revision 1.26 – October 15, 2007  
440EPx – PPC440EPx Embedded Processor  
Preliminary Data Sheet  
Table 12. Overshoot and Undershoot  
TOS  
Receiver  
3.3V LVTTL  
AC Overshoot (V)  
DC Overshoot (V)  
DC Undershoot (V)  
AC Undershoot (V)  
1
1
3.9  
3.6  
-0.16  
-0.6  
-0.6  
0.1*TCYC  
0.1*TCYC  
2.5V (3.3V tolerant)  
3.9  
3.6  
-0.16  
-0.3  
1.2*SOVDD  
1.2*OVDD  
SOVDD + 0.3  
OVDD + 0.5  
DDR  
PCI  
-0.6  
0.1/MemClkOut  
0.1/PCIClk  
-0.2*OVDD  
-0.5  
Notes:  
1. T  
is the period of the bus clock.  
CYC  
1/PerClk - EBC and NAND flash interfaces.  
1/GMCRXClk - GMII and MII modes  
1/SMIIRefClk - SMII mode  
1/GMCGRXClk - RGMII mode  
1/USB2Clk - UTMI  
1/TrcClk - instruction trace interface  
1/IIC0Clk and 1/IIC1Clk - IIC interfaces  
1/SPIClkOut - SPI  
Power Sequencing  
Startup sequencing of the power supply voltages is not required. However, a power-down cycle must complete  
(OV and V are below +0.4V) before a new power-up cycle is started.  
DD  
DD  
Analog Voltage Filter  
The analog voltages (AVdd, EAVdd, and UnAVdd) used for the on-chip PLLs can be derived from the logic voltage, but must be  
filtered before the PPC440EPx. A Separate filter, as shown below, is recommended for each voltage.  
• The filter should keep the analog voltage to analog ground compression/expansion due to noise less than +50  
mV.  
• Keep all wire lengths as short as possible.  
• Analog grounds must be brought out and connected to the digital ground plane at the filter capacitor.  
• The impedance of the ferrite bead should be much greater than that of the capacitor at frequencies where  
noise is expected.  
VDD  
AVDD, SAVDD, UnAVdd  
L
L – SMT ferrite bead chip, Murata  
BLM21PG600SN1  
C
AGND, SAGND, UnAGND  
GND  
AMCC Proprietary  
69  
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