參數(shù)資料
型號: MPC8349ECZUAJDB
廠商: Freescale Semiconductor
文件頁數(shù): 10/87頁
文件大小: 0K
描述: IC MPU PWRQUICC II 672-TBGA
標準包裝: 24
系列: MPC83xx
處理器類型: 32-位 MPC83xx PowerQUICC II Pro
速度: 533MHz
電壓: 1.2V
安裝類型: 表面貼裝
封裝/外殼: 672-LBGA
供應(yīng)商設(shè)備封裝: 672-TBGA(35x35)
包裝: 托盤
配用: MPC8349E-MITX-GP-ND - KIT REFERENCE PLATFORM MPC8349E
MPC8349E-MITXE-ND - BOARD REFERENCE FOR MPC8349
MPC8349EA-MDS-PB-ND - KIT MODULAR DEV SYSTEM MPC8349E
MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13
18
Freescale Semiconductor
DDR and DDR2 SDRAM
Table 19 provides the input AC timing specifications for the DDR SDRAM interface.
Figure 5 illustrates the DDR input timing diagram showing the tDISKEW timing parameter.
Figure 5. 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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