Sundance Spas ST201 User Manual
Page 30
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Sundance Technology
ST201
PRELIMINARY draft 2
TXDMANEXTPTR
Class....................DMA Data Structures, TFD
Base Address ......Start of TFD
Address Offset .....0x00
Access Mode .......Read/Write
Width ...................32 bits
BIT
BIT NAME
BIT DESCRIPTION
31..0
TxDMANextPtr
Transmit Next Pointer, the first double word in the TFD contains the
physical address of the next TFD in the TxDMAList. The value of zero
accompanies the last frame of the list and it indicates there are no
more TFD’s in the TxDMAList. All TFD’s must be aligned on 8-byte
physical address boundaries, requiring Bits [2..0] of TxDMANextPtr to
be zero.