status read
1.To control the SD memory card by a SoC, we design a SD Host Controller IP to realize the function of status control, interrupt control, read/write control, remove control. It can make design team integrate this IP into SoC. Moreover, this IP should have more advanced function, such as APB communication and DMA access.
4.After PM4354 accomplishes the bitsynchronization, QEl will read the status registers of the PM4354 to get the status of each El circuit and choose recovered clock of the specified the El circuit as the external timing source of the whole HTC-5200AN equipment. Thereby, the choice of external timing source brought by the changing from the El to QEl has been resolved.
