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DS3134
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Transmit DMA Operation Figure 8.2.1A
00h
08h
Done Queue Descriptors
(circular queue)
dmatbd
04h
Free Desc. Ptr.CH#5Status
Free Desc. Ptr.CH#1Status
Free Desc. Ptr.CH#Status
00h
Pending Queue Descriptors
(circular queue)
04h
Free Desc. Ptr.CH#5PRI
Free Desc. Ptr.CH#1PRI
Data Buffer Address
CH #1
EOF
Last Transmitted
Data Buffer
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
Data Buffer Address
CH #1
EOF
2nd Transmitted
Data Buffer
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
Data Buffer Address
CH #1
EOF
1st Transmitted
Data Buffer
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
Data Buffer Address
CH #5
EOF
1st Queued
Data Buffer
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
Data Buffer Address
CH #5
EOF
2nd Queued
Data Buffer
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
Data Buffer Address
CH #5
EOF
Last Queued
Data Buffer
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
Data Buffer Address
CH #1
EOF
Queued
Data Buffer
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
Open Descriptor Space
Available for Use by the Host
Data Buffer Address
CH #5
EOF
Transmitted
Data Buffer
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.PV
CV
unused
unused
08h
0Ch
Free Desc. Ptr.CH#PRI
Free Desc. Ptr.CH#PRI
Open Descriptor Space
Available for Use by the Host
0Ch
14h
10h
Free Desc. Ptr.CH#Status
Free Desc. Ptr.CH#Status
Free Desc. Ptr.CH#Status
EOF = 0
EOF = 0
EOF = 1
EOF = 0
EOF = 1
EOF = 0
EOF = 0
EOF = 1