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| 型號(hào)： | MC8641DHX1250HE |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 27/130頁(yè) |
| 文件大小： | 0K |
| 描述： | IC DUAL CORE PROCESSOR 1023-CBGA |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | MPC86xx |
| 處理器類(lèi)型： | 32-位 MPC86xx PowerPC |
| 速度： | 1.25GHz |
| 電壓： | 1.05V |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 1023-BCBGA，F(xiàn)CCBGA |
| 供應(yīng)商設(shè)備封裝： | 1023-FCCBGA（33x33） |
| 包裝： | 托盤(pán) |
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MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
122
Freescale Semiconductor
System Design Information
The mechanical drawing for the single core device is located in Section 16.2, “Mechanical Dimensions of
For other pin pull-up or pull-down recommendations of signals, please see Section 17, “Signal Listings.”
20.7
Output Buffer DC Impedance
The MPC8641 drivers are characterized over process, voltage, and temperature. For all buses, the driver
is a push-pull single-ended driver type (open drain for I2C).
To measure Z0 for the single-ended drivers, an external resistor is connected from the chip pad to OVDD
or GND. Then, the value of each resistor is varied until the pad voltage is OVDD/2 (see Figure 66). The
output impedance is the average of two components, the resistances of the pull-up and pull-down devices.
When data is held high, SW1 is closed (SW2 is open) and RP is trimmed until the voltage at the pad equals
OVDD/2. RP then becomes the resistance of the pull-up devices. RP and RN are designed to be close to each
other in value. Then, Z0 = (RP + RN)/2.
Figure 66. Driver Impedance Measurement
Table 73 summarizes the signal impedance targets. The driver impedances are targeted at minimum VDD,
nominal OVDD, 105°C.
Table 73. Impedance Characteristics
Impedance
DUART, Control,
Configuration, Power
Management
PCI
Express
DDR DRAM
Symbol
Unit
RN
43 Target
25 Target
20 Target
Z0
W
RP
43 Target
25 Target
20 Target
Z0
W
OVDD
OGND
RP
RN
Pad
Data
SW1
SW2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC8641DHX1000GE | IC DUAL CORE PROCESSOR 1023-CBGA |
| MPC8572VTAVND | MPU POWERQUICC III 1023-PBGA |
| MPC8572VTAVNB | MPU POWERQUICC III 1023-PBGA |
| MPC8572VTAULB | MPU POWERQUICC III 1023-PBGA |
| MPC8572VTATLB | MPU POWERQUICC III 1023-PBGA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC8641DHX1250J | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MC8641DHX1250K | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MC8641DHX1250N | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MC8641DHX1333G | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MC8641DHX1333H | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
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