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參數(shù)資料
| 型號： | IBM25NPE405H-3BA266CZ |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 266 MHz, RISC PROCESSOR, PBGA580 |
| 封裝： | 35 MM, PLASTIC, EBGA-580 |
| 文件頁數(shù)： | 69/74頁 |
| 文件大?。?/td> | 1423K |
| 代理商： | IBM25NPE405H-3BA266CZ |
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Preliminary
PowerNP NPe405H Embedded Processor Data Sheet
71
Initialization
The following describes the method by which initial chip settings are established when a system reset occurs.
Strapping
While the SysReset input pin is low (system reset), the state of certain I/O pins is read to enable default initial
conditions prior to NPe405H start-up. The actual capture instant is the nearest SysClk edge before the
deassertion of reset. These pins must be strapped using external pull-up (logical 1) or pull-down (logical 0)
resistors to select the desired default conditions. The recommended pull-up is 3 k
to +3.3V or 10k to +5V,
the recommended pull-down is 1k
to GND.These pins are used for strap functions only during reset. They
are used for other signals during normal operation. The following table lists the strapping pins along with their
functions and strapping options.
EEPROM
During reset, configuration values other than those obtained from the strapping pins can be read from a serial
EEPROM connected to the IIC port. The association of bits in the EEPROM with the configuration values and
their default values are covered in detail in the
PowerNP NPe405H Network Processor User’s Manual.
Caution: If SEPROMPresent is strapped to 1, and the EEPROM is not connected or is defective, the
NPe405H will not boot up.
Strapping Pin Assignments
Function
Option
Ball Strapping
SEPROMPresent –
Serial EEPROM connection to the IIC interface
AJ33
(UART1_Tx)
Not connected
0
Connected
1
H01
(HoldAck)
H02
(ExtAck)
When SEPROMPresent = 1, these pins set the high-
order two bits of the EEPROM base address.
High order EEPROM base address bits
x
When SEPROMPresent = 0, these pins indicated the
width of the boot ROM.
8 bits
0
16 bits
0
1
32 bits
1
0
reserved
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IBM25NPE405H-3DA200CZ | 32-BIT, 200 MHz, RISC PROCESSOR, PBGA580 |
| IBM25NPE405L-3DA200CZ | 32-BIT, 200 MHz, RISC PROCESSOR, PBGA324 |
| IBM25NPE405L-3FA200CZ | 32-BIT, 200 MHz, RISC PROCESSOR, PBGA324 |
| IBM25NPE405L-3FA266CZ | 32-BIT, 266 MHz, RISC PROCESSOR, PBGA324 |
| IBM25PPC405EP-3GB133CZ | 32-BIT, 133.33 MHz, RISC PROCESSOR, PBGA385 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IBM25NPE405L-3FA133C | 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PowerNP |
| IBM25NPE405L-3FA133CZ | 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PowerNP |
| IBM25NPE405L-3FA200C | 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PowerNP |
| IBM25NPE405L-3FA200CZ | 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PowerNP |
| IBM25NPE405L-3FA266C | 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PowerNP |
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