32.8.125 Receive DMA Data Buffer Address Mask

Table 32-140. Register Bit Attribute Legend
SymbolDescriptionSymbolDescriptionSymbolDescription
RReadable bitHCCleared by Hardware(Grey cell)Unimplemented
WWritable bitHSSet by HardwareXBit is unknown at Reset
KWrite to clearSSoftware settable bit
Name: DMAAM
Offset: 0x00D0
Reset: 0x00000000
Property: Read/Write

Bit 3130292827262524 
 MVAL[3:0]     
Access R/WR/WR/WR/W 
Reset 0000 
Bit 2322212019181716 
          
Access  
Reset  
Bit 15141312111098 
          
Access  
Reset  
Bit 76543210 
     MEN[3:0] 
Access R/WR/WR/WR/W 
Reset 0000 

Bits 31:28 – MVAL[3:0] Receive DMA Data Buffer Mask Value

Values used to force bits 31:28 of the receive data buffer AHB/AXI address to a particular value when the associated enable bits stored in this register [3:0] are set. Any changes to this register will be ignored while the DMA is currently processing a receive packet. It will only affect the next full packet to be written to external system memory.

Bits 3:0 – MEN[3:0] Receive DMA Data Buffer Mask Enable

These bits are associated directly with bits [31:28].

When bit 0 is set, the AHB/AXI address bit 28 used for accessing the receive data buffers will be forced to the value stored in bit 28 of this register.

When bit 1 is set, the AHB/AXI address bit 29 used for accessing the receive data buffers will be forced to the value stored in bit 29 of this register.

When bit 2 is set, the AHB/AXI address bit 30 used for accessing the receive data buffers will be forced to the value stored in bit 30 of this register.

When bit 3 is set, the AHB/AXI address bit 31 used for accessing the receive data buffers will be forced to the value stored in bit 31 of this register.

When these bits are clear, the associated value stored in bits 31:28 have no effect on the AHB/AXI address used for receive data buffer accesses. Any changes to this register will be ignored while the DMA is currently processing a receive packet. It will only affect the next full packet to be written to external memory.