参数资料
型号: MPC8379VRANG
厂商: Freescale Semiconductor
文件页数: 62/117页
文件大小: 0K
描述: MPU POWERQUICC II PRO 689-PBGA
标准包装: 27
系列: MPC83xx
处理器类型: 32-位 MPC83xx PowerQUICC II Pro
速度: 800MHz
电压: 1.05V
安装类型: 表面贴装
封装/外壳: 689-BBGA 裸露焊盘
供应商设备封装: 689-TEPBGA II(31x31)
包装: 托盘
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
Freescale Semiconductor
49
This figure provides the eSDHC clock input timing diagram.
Figure 29. eSDHC Clock Input Timing Diagram
11.3.1
High-Speed Output Path (Write)
This figure 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
Eqn. 10
With clock delay:
tSHSKHOV + tDATA_DELAY + tISU < tSHSCKL + tCLK_DELAY
Eqn. 11
tDATA_DELAY tCLK_DELAY < tSHSCKL tISU tSHSKHOV
Eqn. 12
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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