參數(shù)資料
型號： MPC8349ECZUALDB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 667 MHz, MICROPROCESSOR, PBGA672
封裝： 35 X 35 MM, 1.46 MM HEIGHT, 1 MM PITCH, TBGA-672
文件頁數(shù)： 10/87頁
文件大小： 1037K
代理商： MPC8349ECZUALDB
MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 12
18
Freescale Semiconductor
DDR and DDR2 SDRAM
Table 19 provides the input AC timing specifications for the DDR SDRAM interface.
Figure 4 illustrates the DDR input timing diagram showing the tDISKEW timing parameter.
Figure 4. DDR Input Timing Diagram
Table 19. DDR and DDR2 SDRAM Input AC Timing Specifications
At recommended operating conditions with GVDD of (1.8 or 2.5 V) ± 5%.
Parameter
Symbol
Min
Max
Unit
Notes
Controller Skew for MDQS—MDQ/MECC/MDM
tCISKEW
ps
1, 2
400 MHz
–600
600
3
333 MHz
–750
750
—
266 MHz
–750
750
—
200 MHz
–750
750
—
Notes:
1. tCISKEW represents the total amount of skew consumed by the controller between MDQS[n] and any corresponding bit that
will be captured with MDQS[n]. This should be subtracted from the total timing budget.
2. The amount of skew that can be tolerated from MDQS to a corresponding MDQ signal is called tDISKEW. This can be
determined by the equation: tDISKEW = ± (T/4 – abs (tCISKEW)); where T is the clock period and abs (tCISKEW) is the absolute
value of tCISKEW.
3. This specification applies only to the DDR interface.
MCK[n]
tMCK
MDQ[x]
MDQS[n]
tDISKEW
D1
D0
tDISKEW
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相關代理商/技術參數(shù)
參數(shù)描述
MPC8349ECZUALFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications
MPC8349E-MDS 功能描述:開發(fā)板和工具包 - 其他處理器 KIT FOR MPC8349E BDS RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
MPC8349E-MDS-PB 功能描述:開發(fā)板和工具包 - 其他處理器 PROCESSR BD MPC8349E RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
MPC8349E-MDS-PBE 功能描述:開發(fā)板和工具包 - 其他處理器 MPC8349E FAMILY ADS RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
MPC8349E-MITXE 功能描述:開發(fā)板和工具包 - 其他處理器 REFERENCE BRD FOR MPC834 RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
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