Analog Devices ADSP-BF59x Blackfin Hardware Reference Manual page 521

selectively 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.

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
disable
be disabled before re-enabling. Disabling only TX or RX is not
allowed.
ADSP-BF59x Blackfin Processor Hardware Reference
register), unless it is in multichannel mode
SPORT_TCR1
= 1 in the
SPORT_TCR2
or
SPORT_TX SPORT_RX
and then disable
TXEN
SPORT Controller
pin is always driven (not
DTSEC
register), unless the SPORT is in
operation for multichannel mode.
bit (in
MCMEN
or
SPORT_TX SPORT_RX
. Note both
RXEN TXEN
and
RSPEN TSPEN
)
SPORT_MCMC2
operation.
and must
RXEN
14-15