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| 型號： | MC7447AVU867NB |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 36/56頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU RISC 32BIT 360-BGA |
| 標準包裝： | 44 |
| 系列： | MPC74xx |
| 處理器類型： | 32-位 MPC74xx PowerPC |
| 速度： | 867MHz |
| 電壓： | 1.1V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 360-BCBGA，F(xiàn)CCBGA |
| 供應商設備封裝： | 360-FCCBGA（25x25） |
| 包裝： | 托盤 |
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MPC7447A RISC Microprocessor Hardware Specifications, Rev. 5
Freescale Semiconductor
41
System Design Information
The COP header shown in Figure 19 adds many benefits—breakpoints, watchpoints, register and memory
examination/modification, and other standard debugger features are possible through this interface—and
can be as inexpensive as an unpopulated footprint for a header to be added when needed.
The COP interface has a standard header for connection to the target system, based on the 0.025"
square-post, 0.100" centered header assembly (often called a Berg header). The connector typically has
pin 14 removed as a connector key.
There is no standardized way to number the COP header shown in Figure 19; consequently, many different
pin numbers have been observed from emulator vendors. Some are numbered top-to-bottom then
left-to-right, while others use left-to-right then top-to-bottom, while still others number the pins counter
clockwise from pin 1 (as with an IC). Regardless of the numbering, the signal placement recommended in
Figure 19 is common to all known emulators.
The QACK signal shown in Figure 19 is usually connected to the PCI bridge chip in a system and is an
input to the MPC7447A informing it that it can go into the quiescent state. Under normal operation this
occurs during a low-power mode selection. In order for COP to work, the MPC7447A must see this signal
asserted (pulled down). While shown on the COP header, not all emulator products drive this signal. If the
product does not, a pull-down resistor can be populated to assert this signal. Additionally, some emulator
products implement open-drain type outputs and can only drive QACK asserted; for these tools, a pull-up
resistor can be implemented to ensure this signal is negated when it is not being driven by the tool. Note
that the pull-up and pull-down resistors on the QACK signal are mutually exclusive and it is never
necessary to populate both in a system. To preserve correct power-down operation, QACK should be
merged through logic so that it also can be driven by the PCI bridge.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC7447RX1000LB | 制造商:Motorola Inc 功能描述: |
| MC7447RX1000NB | 制造商:Freescale Semiconductor 功能描述:IC, 32BIT MPU, 1000MHZ, BGA-360, Series:(Power) HOST MPU, Core Size:32bit, Progr |
| MC7447RX600NB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PPC7457RX1000NB |
| MC7447RX733NB | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC7447RX867NB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PPC7457RX1000NB |
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