W90P710_05 Datasheet, PDF (239/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Continued.
BITS
[3]
DMARd
[2]
DMAWr
[1]
SWRST
[0]
SDIOEN
DESCRIPTIONS
DMA Read Enable
Set this bit high enables the DMA to transfer data from external
SDRAM to internal buffer. This bit will be cleared automatically after
DMA operation finished. Write 0 to this bit has no effect.
1’b0: No DMA operation (Default)
1’b1: Enable DMA read operation
DMA Write Enable
Set this bit high enables the DMA to transfer data from internal buffer
into external SDRAM. This bit will be cleared automatically after DMA
operation finished. Write 0 to this bit has no effect.
1’b0: No DMA operation (Default)
1’b1: Enable DMA write operation
Software Reset
Set this bit high will reset only the logic circuit of SDIO host controller
and has no effect on all control registers.
1’b0: No operation (Default)
1’b1: Enable software reset
SDIO Function Enable
Set this bit high enables the SDIO host controller operation. If this bit is
cleared, all operations are disabled and SDIO host controller only
responses to control register access.
1’b0: Disable SDIO host controller (Default)
1’b1: Enable SDIO host controller
SD DMA Transfer Starting Address Register (SDDSA)
REGISTER ADDRESS
SDDSA 0xFFF0_7004
R/W
DESCRIPTION
R/W SD DMA Transfer Starting Address Register
RESET VALUE
0x0000_0000
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Publication Release Date: January 17, 2005
Revision A.2