Data Independent Transmit Frame Sync - Analog Devices ADSP-BF506F Hardware Reference Manual

RSCLK
or
TSCLK
LATE
FRAME
SYNC
EARLY
FRAME
SYNC
DATA
Figure 19-12. Normal Versus Alternate Framing

Data Independent Transmit Frame Sync

Normally the internally generated transmit frame sync signal (
put only when the
data-independent transmit frame sync select bit (
uous generation of the
of the
SPORT_TCR1
When = 0, the internally generated
DITFS
data word has been loaded into the
erated once data is loaded into
data to be transmitted only when it is available.
When = 1, the internally generated
DITFS
interval regardless of whether new data is available in the
Whatever data is present in
tion of . The
TFS
register is set when this occurs and old data is retransmitted. The
tus bit is also set if the
externally generated
is transmitted only at specified times.
If the internally generated
register is required to start the transfer.
ADSP-BF50x Blackfin Processor Hardware Reference
B3 B2
buffer has data ready to transmit. The
SPORT_TX
signal, with or without new data. The
TFS
register configures this option.
SPORT_TX
SPORT_TX
(transmit underflow status) bit in the
TUVF
buffer does not have new data when an
SPORT_TX
occurs. Note that in this mode of operation, data
TFS
is used, a single write to the
TFS
B1 B0
DITFS)
is only output when a new
TFS
buffer. The next
SPORT_TX
. This mode of operation allows
is output at its programmed
TFS
is transmitted again with each asser-
SPORT Controller
...
) is out-
TFS
allows the contin-
bit
DITFS
is gen-
TFS
buffer.
SPORT_TX
SPORT_STAT
sta-
TUVF
data
SPORT_TX
19-37