Sdio Bus Topology; Figure 284. Sdio "No Response" And "No Data" Operations; Figure 285. Sdio (Multiple) Block Read Operation - ST STM32F207 Series Reference Manual

Advanced arm-based 32-bit mcus

Hide thumbs Also See for STM32F207 Series:

Table of Contents

Secure digital input/output interface (SDIO)

SDIO bus topology

Communication over the bus is based on command and data transfers.

The basic transaction on the MultiMediaCard/SD/SD I/O bus is the command/response

transaction. These types of bus transaction transfer their information directly within the

command or response structure. In addition, some operations have a data token.

Data transfers to/from SD/SDIO memory cards are done in data blocks. Data transfers

to/from MMC are done data blocks or streams. Data transfers to/from the CE-ATA Devices

are done in data blocks.

From host to card(s)

Operation (no response)

From host to card From card to host

Data block crc

Block read operation

Multiple block read operation

RM0033 Rev 9

From host to card

Operation (no data)

data from card to host

Data block crc

From card to host

Stop command

stops data transfer

Command Response

Data block crc

Data stop operation

Table of Contents

Do you have a question about the STM32F207 Series and is the answer not in the manual?