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Zynq-7000 AP SoC Technical Reference Manual www.xilinx.com 1543
UG585 (v1.11) September 27, 2016
Appendix B: Register Details
Register (sdio) Argument
Host_SDMA_Buffer_Si
ze
14:12 rw 0x0 To perform long DMA transfer, the System
Address register shall be updated at every system
boundary during a DMA transfer. These bits
specify the size of contiguous buffer in the system
memory. The DMA transfer shall wait at every
boundary specified by these fields and the HC
generates the DMA Interrupt to request the HD to
update the System Address register.
These bits shall support when the DMA Support
in the Capabilities register is set to 1 and this
function is active when the DMA Enable in the
Transfer Mode register is set to 1.
000b - 4KB(Detects A11 Carry out)
001b - 8KB(Detects A12 Carry out)
010b - 16KB(Detects A13 Carry out)
011b - 32KB(Detects A14 Carry out)
100b - 64KB(Detects A15 Carry out)
101b -128KB(Detects A16 Carry out)
110b - 256KB(Detects A17 Carry out)
111b - 512KB(Detects A18 Carry out)
Transfer_Block_Size 11:0 rw 0x0 This register specifies the block size for block data
transfers for CMD17, CMD18, CMD24, CMD25,
and CMD53. It can be accessed only if no
transaction is executing (i.e. after a transaction has
stopped). Read operations during transfer return
an invalid value and write operations shall be
ignored.
0000h - No Data Transfer
0001h - 1 Byte
0002h - 2 Bytes
0003h - 3 Bytes
0004h - 4 Bytes
--- ---
01FFh - 511 Bytes
0200h - 512 Bytes
--- ---
0800h - 2048 Bytes
Name Argument
Relative Address 0x00000008
Absolute Address sd0: 0xE0100008
sd1: 0xE0101008
Field Name Bits Type Reset Value Description