Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 289

2. The processor enables the link port by setting the
enables the link port DMA by setting the
register. Because this is a transmit, setting
asserts an internal DMA request.
3. After the request is granted the internal DMA transfer is performed
filling the
4. The external device begins reading data from the
through the link port.
5. The
TXLBx
empty) and asserts another DMA request continuing the process.
ADSP-214xx SHARC Processor Hardware Reference
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buffer's FIFO.
TXLBx
buffer detects that there is room in the buffer (partially
Link Ports—ADSP-2146x
bit and
LEN
bit in the LCTLx
LDEN
automatically
LDEN
buffer
TXLBx
4-25