Analog Devices ADSP-BF506F Hardware Reference Manual page 874

Description of Operation
total channels. RX and TX must use the same 128-channel region to selec-
tively enable channels. The SPORT can do any of the following on each
channel:
• Transmit data
• Receive data
• Transmit and receive data
• Do nothing
Data companding and DMA transfers can also be used in multichannel
mode.
The pin is always driven (not three-stated) if the SPORT is enabled
DTPRI
( = 1 in the
TSPEN
and an inactive time slot occurs. The
three-stated) if the SPORT is enabled and the secondary transmit is
enabled (
TXSE
multichannel mode and an inactive time slot occurs.
In multichannel mode,
ated internally by the SPORT, and this signal is used for both transmit
and receive functions. Leave
only in multichannel mode. If
the signal is internally distributed to both the receiver and transmitter
circuitry.

The SPORT multichannel transmit select register and the SPORT
multichannel receive select register must be programmed before
enabling
This is especially important in "DMA data unpacked mode," since
SPORT FIFO operation begins immediately after
are set, enabling both RX and TX. The
must be enabled prior to enabling
When disabling the SPORT from multichannel operation, first
19-16
register), unless it is in multichannel mode
SPORT_TCR1
= 1 in the
SPORT_TCR2
can either be provided externally or gener-
RSCLK
TSCLK
RSCLK
or
SPORT_TX SPORT_RX
ADSP-BF50x Blackfin Processor Hardware Reference
pin is always driven (not
DTSEC
register), unless the SPORT is in
disconnected if the SPORT is used
is externally or internally provided,
operation for multichannel mode.
bit (in
MCMEN
or
SPORT_TX
and
RSPEN TSPEN
SPORT_MCMC2
operation.
SPORT_RX
)