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參數(shù)資料
| 型號： | PC755CMGHU300LE |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | PowerPC 755/745 RISC Microprocessor |
| 中文描述： | 32-BIT, 300 MHz, RISC PROCESSOR, CBGA360 |
| 封裝： | HITCE, CERAMIC, BGA-360 |
| 文件頁數(shù)： | 48/50頁 |
| 文件大?。?/td> | 1064K |
| 代理商： | PC755CMGHU300LE |
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48
PC755/745
2138D–HIREL–06/03
In addition, CKSTP_OUT is an open-drain style output that requires a pull-up resistor (1
k
– 5 k
) if it is used by the system.
During inactive periods on the bus, the address and transfer attributes may not be
driven by any master and may, therefore, float in the high-impedance state for relatively
long periods of time. Since the processor must continually monitor these signals for
snooping, this float condition may cause additional power draw by the input receivers on
the processor or by other receivers in the system. These signals can be pulled up
through weak (10 k
) pull-up resistors by the system or may be otherwise driven by the
system during inactive periods of the bus to avoid this additional power draw, but
address bus pull-up resistors are not neccessary for proper device operation. The
snooped address and transfer attribute inputs are:
A[0:31], AP[0:3], TT[0:4], TBST, and GBL.
The data bus input receivers are normally turned off when no read operation is in
progress and, therefore, do not require pull-up resistors on the bus. Other data bus
receivers in the system, however, may require pull-ups, or that those signals be other-
wise driven by the system during inactive periods by the system. The data bus signals
are: DH[0:31], DL[0:31], and DP[0:7].
If 32-bit data bus mode is selected, the input receivers of the unused data and parity bits
will be disabled, and their outputs will drive logic zeros when they would otherwise nor-
mally be driven. For this mode, these pins do not require pull-up resistors, and should be
left unconnected by the system to minimize possible output switching.
If address or data parity is not used by the system, and the respective parity checking is
disabled through HID0, the input receivers for those pins are disabled, and those pins
do not require pull-up resistors and should be left unconnected by the system. If all par-
ity generation is disabled through HID0, then all parity checking should also be disabled
through HID0, and all parity pins may be left unconnected by the system.
Definitions
Datasheet Status
Validity
Objective specification
This datasheet contains target and goal specification for
discussion with customer and application validation.
Before design phase.
Target specification
This datasheet contains target or goal specification for
product development.
Valid during the design phase.
Preliminary specification
∝
site
This datasheet contains preliminary data. Additional data
may be published later; could include simulation result.
Valid before characterization phase.
Preliminary specification
β
site
This datasheet contains also characterization results.
Valid before the industrialization
phase.
Product specification
This datasheet contains final product specification.
Valid for production purpose.
Limiting Values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the
limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at
any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values
for extended periods may affect device reliability.
Application Information
Where application information is given, it is advisory and does not form part of the specification.
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| PC755CMGHU400LE | PowerPC 755/745 RISC Microprocessor |
| PC755CMGSU300LE | PowerPC 755/745 RISC Microprocessor |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PC755CMGHU350LE | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:PowerPC 755/745 RISC Microprocessor |
| PC755CMGHU366LE | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:PowerPC 755/745 RISC Microprocessor |
| PC755CMGHU400LE | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:PowerPC 755/745 RISC Microprocessor |
| PC755CMGSU300LE | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:PowerPC 755/745 RISC Microprocessor |
| PC755CMGSU350LE | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:PowerPC 755/745 RISC Microprocessor |
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