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NPE405H-3BA266CZ 参数 Datasheet PDF下载

NPE405H-3BA266CZ图片预览
型号: NPE405H-3BA266CZ
PDF下载: 下载PDF文件 查看货源
内容描述: 的PowerNP NPe405H嵌入式处理器 [PowerNP NPe405H Embedded Processor]
分类和应用: 微控制器和处理器外围集成电路微处理器时钟
文件页数/大小: 70 页 / 1343 K
品牌: AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
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Revision 1.01 – April 18, 2007  
NPe405H – PowerNP NPe405H Embedded Processor  
SIGNAL DESCRIPTION  
Data Sheet  
The following table provides a summary of the number of package pins (balls) associated with each functional  
interface group.  
PIN SUMMARY  
Table 5. Pin Summary  
Group  
No. of Pins  
Nonmultiplexed Signals  
Multiplexed Signals  
Total Signal Pins  
256  
85  
341  
AV  
DD  
1
OV  
DD  
49  
24  
V
DD  
Gnd  
65  
100  
0
Gnd (and thermal)  
Reserved  
Total Pins  
580  
Multiplexed Pins  
In the table “Signal Functional Description” on page 43, each external signal is listed along with a short description  
of the signal function. The signals are grouped together according to their function. Some signals are multiplexed  
on the same package pin (ball) so that the pin can be used for different functions. In most cases, the signal name is  
shown in this table unaccompanied by multiplexed signal names that may be associated with it. In cases where  
multiplexed signals are in the same functional group, the names appear as a default signal followed by secondary  
signals in square brackets (for example, EMC0TxErr[EMC0Tx1En]). Active-low signals (for example, RAS) are  
marked with an overline. Any signal that is not the primary (default) signal on a multiplexed pin is shown in square  
brackets.  
The active signal on a multiplexed pin is controlled by programming. It is expected that in any single application, a  
particular pin will always be programmed to serve the same function. The flexibility of multiplexing allows a single  
chip to offer a richer pin selection than would otherwise be possible.  
Multipurpose Pins  
In addition to multiplexing, pins may also be multipurpose. An example of multi-purpose use occurs when the EBC  
peripheral controller address pins are used as outputs by the NPe405H to broadcast an address to external slave  
devices when the NPe405H has control of the external bus. However, when an external master gains ownership of  
the external bus, these same pins are used as inputs which are driven by the external master and received by the  
EBC in the NPe405H. In this example, the pins are also bidirectional, serving as both inputs and outputs.  
Initialization Strapping  
One group of pins is used as strapped inputs during system reset. These pins function as strapped inputs only dur-  
ing reset and are used for other functions during normal operation (see “Initialization” on page 68). Note that the  
use of these pins for strapping is not considered multiplexing since the strapping function is not programmable.  
AMCC Proprietary  
DS2011  
41  
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