Owner's manual

DS3131
99 of 174
Figure 9-10. Transmit DMA Operation
00h
08h
Done-Queue Descriptors
(circular queue)
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 Buffe
r
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
Data Buffer Address
CH #1
EOF
2nd Transmitted
Data Buffe
r
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
Data Buffer Address
CH #1
EOF
1st Transmitted
Data Buffe
r
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
Data Buffer Address
CH #5
EOF
1st Queued
Data Buffe
r
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
Data Buffer Address
CH #5
EOF
2nd Queued
Data Buffe
r
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
Data Buffer Address
CH #5
EOF
Last Queued
Data Buffe
r
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
Data Buffer Address
CH #1
EOF
Queued
Data Buffe
r
for Channel 1
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
Open Descriptor Space
A
vailable for Use by the Hos
t
Data Buffer Address
CH #5
EOF
Transmitted
Data Buffe
r
for Channel 5
# Bytes Next Desc. Ptr.
Next Pend. Desc.P
V
CV
unused
unused
08h
0Ch
Free Desc. Ptr.CH#PRI
Free Desc. Ptr.CH#PRI
Open Descriptor Space
A
vailable for Use by the Hos
t
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