參數(shù)資料
型號: MPC8379ECVRANGA
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA689
封裝: 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689
文件頁數(shù): 58/114頁
文件大?。?/td> 1337K
代理商: MPC8379ECVRANGA
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2
48
Freescale Semiconductor
Enhanced Secure Digital Host Controller (eSDHC)
Figure 29 provides the eSDHC clock input timing diagram.
Figure 29. eSDHC Clock Input Timing Diagram
11.3.1
High-Speed Output Path (Write)
Figure 30 provides the data and command output timing diagram.
Figure 30. High Speed Output Path
11.3.1.1
High-Speed Write Meeting Setup (Maximum Delay)
The following equations show how to calculate the allowed skew range between the SD_CLK and
SD_DAT/CMD signals on the PCB.
Zero clock delay:
tSHSKHOV + tDATA_DELAY + tISU < tSHSCKL
With clock delay:
tSHSKHOV + tDATA_DELAY + tISU < tSHSCKL + tCLK_DELAY
tDATA_DELAY tCLK_DELAY < tSHSCKL tISU tSHSKHOV
eSDHC
tSHSCKR
External Clock
VM
tSHSCK
tSHSCKF
VM = Midpoint Voltage (OVDD/2)
operational mode
tSHSCKL
tSHSCKH
Output Valid Time: tSHSKHOV
Output Hold Time: tSHSKHOX
tIH (2 ns)
tCLK_DELAY
Input at the
SD CLK at
Driving
Edge
Sampling
Edge
the Card Pin
SD Card Pins
tISU (6 ns)
tDATA_DELAY
tSHSCKL
tSHSCK (Clock Cycle)
SD CLK at the
MPC8379E Pin
Output from the
MPC8379E Pins
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