參數(shù)資料
型號(hào)： MPC5200
廠(chǎng)商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： Hardware Specifications
中文描述： 硬件規(guī)格
文件頁(yè)數(shù)： 24/80頁(yè)
文件大?。?/td> 790K
代理商： MPC5200
MPC5200 Data Sheet, Rev. 4
Electrical and Thermal Characteristics
Freescale Semiconductor
24
Figure 8. Read Data sample window depend on the number of Tap delay
The position of the t
data_valid
window is depend on the clock / data flight time on the board. The MDQS
signal indicate if the read data are valid. If the controller is not able to detect a valid MDQS signal on the
sample time (sample position A) then the controller will look for valid MDQS / data on the next edge of
the MEM_CLK signal (sample position B). Depend on the board travel time, different working tap delay
configurations are possible. For a fast connection the data will be sampled with the next edge of
MEM_CLK, this shows
Figure 8
, sample position A. With a longer connection maybe two sample
positions are possible.
Figure 8
shows a example with two working sample position (A and B). With a
bigger board delay only sample position B will be possible.
The equation below shows how to calculate the upper and lower limit. The right Tap delay number is
selected, when the possible max and min sample timing is within the memory data valid window.
t
data_sample_max
= max((1.55 + TapNum * 0.095), (1.74 + TapNum * 0.045))
t
data_sample_min
= min((1.55 + TapNum * 0.095), (1.74 + TapNum * 0.045))
delay [ns]
31
Tap delay number
0
1.55
4.59
Possible sample
time over PVT for one
selected Tap delay
Memory Data valid window
8.34
Working Tap Delay range
for sample position A
Working Tap Delay range
for sample position B
t
data_valid_min
t
data_valid_max
t
data_sample_min
t
data_sample_min
selected Tap delay
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC5200B 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:SDRAM/DDR Memory Controller
MPC5200B_08 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:SDRAM / DDR Memory Controller
MPC5200B_10 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:SDRAM/DDR Memory Controller
MPC5200BDS 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:Technical Data
MPC5200BV400 功能描述:微處理器 - MPU 400MHz 760MIPS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
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