Figure 214. Sdio Adapter Command Path - ST STM32F101 series Reference Manual

RM0008
•
Command path state machine (CPSM)
–

Figure 214. SDIO adapter command path

To control unit
Adapter registers
CMD
Argument
To AHB interface
Response
registers
When the command register is written to and the enable bit is set, command
transfer starts. When the command has been sent, the command path state
machine (CPSM) sets the status flags and enters the Idle state if a response is not
required. If a response is required, it waits for the response (see
page 563). When the response is received, the received CRC code and the
internally generated code are compared, and the appropriate status flags are set.
DocID13902 Rev 15
Secure digital input/output interface (SDIO)
Status Control Command
flag logic
Shift
register
CMD
timer
SDIO_CMDin
SDIO_CMDout
CRC
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