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參數(shù)資料
| 型號： | μPD30181 |
| 廠商： | NEC Corp. |
| 英文描述： | 64-Bit RISC Microprosessor(64位RISC微處理器) |
| 中文描述： | 64位RISC Microprosessor（64位的RISC微處理器） |
| 文件頁數(shù)： | 33/68頁 |
| 文件大?。?/td> | 270K |
| 代理商： | ΜPD30181 |
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33
μ
PD30700,30700L,30710
4.2 Secondary Cache Interface
The V
R
10000 has a secondary cache control circuit, so that an external secondary cache memory can be connected.
The V
R
10000 can also selects the operating frequency of the secondary cache interface.
SCClk, at which the secondary cache is to operate, is generated based on the operating clock (PClk) of the
V
R
10000. The factor by which SysClk is multiplied to generate PClk is set by using the BTMC interface at reset. For
details, refer to
SysAD (9:12) in
Table 4-1 Mode Setting in Boot Time Mode
.
4.3 Clock Interface
4.3.1 System interface clock and processor clock
The V
R
10000 generates a processor clock (PClk), which is the internal operating clock, from the clock (SysClk and
SysClk) input to the V
R
10000, by using the PLL. It always samples the SysClk and SysClk signals during operation,
in order to check to see if the following expression is satisfied.
PClk = SysClk
×
(SysClkDiv + 1)/2
Example
Where SysClk = 50 MHz and SysClkDiv = 7
PClk = 50
×
8/2 = 200 MHz
4.3.2 Secondary cache clock
The V
R
10000 supplies clocks for secondary cache (SCClk (5:0) and SCClk (5:0)) to the external secondary cache.
SCClk (5:0) are generated from SysClk.
The relation between SCClk (5:0) and SysClk can be expressed by the following expression.
SCClk = SysClk
×
(SysClkDiv + 1)/(SCClkDiv + 1)
Example
Where SysClk = 50 MHz, SysClkDiv = 7, and SCClkDiv = 2
SCClk = 50
×
8/3 = 133 MHz
4.4 System Configuration Example
Because the V
R
10000 employs a cluster bus, it can also support a multi-processor system. Examples of configuration
of a uni-processor system and a multi-processor system are shown below.
4.4.1 Uni-processor system
This system uses only one V
R
10000, as shown in Figure 4-1.
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相關代理商/技術參數(shù) |
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| PD302 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PHOTOTRANSISTOR | DARLINGTON | 800NM PEAK WAVELENGTH | 30M | DOME-5.0 |
| PD3032 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Li-ion Rechargeable Battery |
| PD306 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PHOTOTRANSISTOR | DARLINGTON | 800NM PEAK WAVELENGTH | 30M | DOME-3.0 |
| PD307 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PHOTOTRANSISTOR | DARLINGTON | 800NM PEAK WAVELENGTH | 30M | LED-2A |
| PD308 | 制造商:NIEC 制造商全稱:Nihon Inter Electronics Corporation 功能描述:DIODE MODULE 30A/800V |
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