参数资料
型号: SPC5200CVR400
厂商: Freescale Semiconductor
文件页数: 18/80页
文件大小: 0K
描述: IC MPU 32BIT 400MHZ 272-PBGA
标准包装: 40
系列: MPC52xx
处理器类型: 32-位 MPC52xx PowerPC
速度: 400MHz
电压: 1.5V
安装类型: 表面贴装
封装/外壳: 272-BBGA
供应商设备封装: 272-PBGA(27x27)
包装: 托盘
Electrical and Thermal Characteristics
MPC5200 Data Sheet, Rev. 4
Freescale Semiconductor
25
3.3.5.4
Memory Interface Timing-DDR SDRAM Write Command
Figure 9. DDR SDRAM Memory Write Timing
3.3.6
PCI
The PCI interface on the MPC5200 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 MPC5200 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 10 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
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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