TMS320DM644x DMSoC Multimedia Card (MMC)/Secure Digital (SD) Card Controller User's Guide

www.ti.com
4.11 MMC Data Receive Register (MMCDRR)
4.12 MMC Data Transmit Register (MMCDXR)
Registers
The MMC data receive register (MMCDRR) is used for storing the received data from the MMC controller.
The CPU or the DMA controller can read data from this register. MMCDRR expects the data in
little-endian format.
The MMC data receive register (MMCDRR) is shown in Figure 28 and described in Table 16 .
Figure 28. MMC Data Receive Register (MMCDRR)
31 0
DRR
R/W-0
LEGEND: R/W = Read/Write; - n = value after reset
Table 16. MMC Data Receive Register (MMCDRR) Field Descriptions
Bit Field Value Description
31-0 DRR 0-FFFF FFFFh Data receive.
The MMC data transmit register (MMCDXR) is used for storing the data to be transmitted from the MMC
controller to the memory card. The CPU or the DMA controller can write data to this register to be
transmitted. MMCDXR expects the data in little-endian format.
The MMC data transmit register (MMCDXR) is shown in Figure 29 and described in Table 17 .
Figure 29. MMC Data Transmit Register (MMCDXR)
31 0
DXR
R/W-0
LEGEND: R/W = Read/Write; - n = value after reset
Table 17. MMC Data Transmit Register (MMCDXR) Field Descriptions
Bit Field Value Description
31-0 DXR 0-FFFF FFFFh Data transmit.
SPRUE30B – September 2006 Multimedia Card (MMC)/Secure Digital (SD) Card Controller 51
Submit Documentation Feedback