参数资料
型号: MPC8560PX833FB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 883 MHz, RISC PROCESSOR, PBGA783
封装: 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, FLIP CHIP, PLASTIC, BGA-783
文件页数: 23/108页
文件大小: 1379K
代理商: MPC8560PX833FB
MPC8560 Integrated Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
21
DDR SDRAM
Figure 5 shows the DDR SDRAM output timing diagram.
Figure 5. DDR SDRAM Output Timing Diagram
6.2.2.2
Load Effects on Address/Command Bus
Table 18 provides approximate delay information that can be expected for the address and command
signals of the DDR controller for various loadings. These numbers are the result of simulations for one
topology. The delay numbers will strongly depend on the topology used. These delay numbers show the
total delay for the address and command to arrive at the DRAM devices. The actual delay could be
different than the delays seen in simulation, depending on the system topology. If a heavily loaded system
is used, the DLL loop may need to be adjusted to meet setup requirements at the DRAM.
Table 18. Expected Delays for Address/Command
Load
Delay
Unit
4 devices (12 pF)
3.0
ns
9 devices (27 pF)
3.6
ns
36 devices (108 pF) + 40 pF compensation capacitor
5.0
ns
36 devices (108 pF) + 80 pF compensation capacitor
5.2
ns
ADDR/CMD
DLL Phase Alignment
tDDKHOV
tDDSHMH
tDDKLDS
tDDKHDS
MDQ[x]
MDQS[n]
MSYNC_IN
MSYNC_OUT
MCK[n]
tMCK
tDDSHME
tDDKLDX
tDDKHDX
tDDSHMP
D1
D0
tDDKHOX
Write A0
NOOP
tMCK
tMCKH
相关PDF资料
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MPC8560VTAQJC 32-BIT, 1000 MHz, RISC PROCESSOR, PBGA783
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