參數(shù)資料
型號: MPC5200CVR400B
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 400 MHz, MICROPROCESSOR, PBGA272
封裝: 27 X 27 MM, 1.27 MM PITCH, ROHS COMPLIANT, PLASTIC, BGA-272
文件頁數(shù): 17/78頁
文件大?。?/td> 1100K
代理商: MPC5200CVR400B
MPC5200B Data Sheet, Rev. 1
Electrical and Thermal Characteristics
Freescale Semiconductor
24
3.3.5.4
Memory Interface Timing-DDR SDRAM Write Command
Figure 8. DDR SDRAM Memory Write Timing
3.3.6
PCI
The PCI interface on the MPC5200B is designed to PCI Version 2.2 and supports 33-MHz and 66-MHz
PCI operations. See the PCI Local Bus Specification [4]; the component section specifies the electrical and
timing parameters for PCI components with the intent that components connect directly together whether
on the planar or an expansion board, without any external buffers or other “glue logic.” Parameters apply
at the package pins, not at expansion board edge connectors.
The MPC5200B is always the source of the PCI CLK. The clock waveform must be delivered to each
33-MHz or 66-MHz PCI component in the system. Figure 9 shows the clock waveform and required
measurement points for 3.3 V signaling environments. Table 22 summarizes the clock specifications.
Table 21. DDR SDRAM Memory Write Timing
Sym
Description
Min
Max
Units
SpecID
tmem_clk
MEM_CLK period
7.5
ns
A5.20
tDQSS
Delay from write command to first
rising edge of MDQS
—tmem_clk+0.4
ns
A5.21
datavalid
MDQ valid before rising edge of
MDQS
TBD
ns
A5.22
datahold
MDQ valid after rising edge of
MDQS
TBD
ns
A5.23
MEM_CLK
Control Signals
MDQ (Data)
MEM_CLK
MDQS (Data Strobe)
NOTE: Control Signals signals are composed of RAS, CAS, MEM_WE, MEM_CS, MEM_CS1 and CLK_EN
Write
tDQSS
Write
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