Sdio Data Length Register (Sdio_Dlen) - ST STM32F205 series Reference Manual

Advanced arm-based 32-bit mcus

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Secure digital input/output interface (SDIO)

SDIO data length register (SDIO_DLEN)

Address offset: 0x28

Reset value: 0x0000 0000

The SDIO_DLEN register contains the number of data bytes to be transferred. The value is

loaded into the data counter when data transfer starts.

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

Bits 31:25 Reserved, must be kept at reset value

Bits 24:0 DATALENGTH: Data length value

For a block data transfer, the value in the data length register must be a multiple of the block

size (see SDIO_DCTRL). A data transfer must be written to the data timer register and the

data length register before being written to the data control register.

For an SDIO multibyte transfer the value in the data length register must be between 1 and

rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw

Number of data bytes to be transferred.

RM0033 Rev 8

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