Analog Devices ADSP-BF506F Hardware Reference Manual page 892

Functional Description
generated frame syncs. Setting
drive data and internally generated frame syncs and selects the falling edge
of to sample externally generated frame syncs.
TSCLK
For the SPORT receiver, setting
selects the falling edge of
and selects the rising edge of
ated frame syncs. Setting
internally generated frame syncs and selects the falling edge of
sample data and externally generated frame syncs.

Note externally generated data and frame sync signals should
change state on the opposite edge than that selected for sampling.
For example, for an externally generated frame sync to be sampled
on the rising edge of the clock (
ter), the frame sync must be driven on the falling edge of the clock.
The transmit and receive functions of two SPORTs connected together
should always select the same value for
in the receiver, so that the transmitter drives the data on one edge and the
receiver samples the data on the opposite edge.
In Figure 19-10,
nected together to share the same clock and frame syncs.
Figure 19-10. Example of
nected
19-34
TCKFE
RCKFE
to drive internally generated frame syncs
RSCLK
RSCLK
= 0 selects the rising edge of
RCKFE
= = 0 and transmit and receive are con-
TCKFE RCKFE
DRIVE
EDGE
TSCLK = RSCLK
INTERNAL OR EXTERNAL
TFS = RFS
INTERNAL OR EXTERNAL
DT
DR
=
TCKFE
ADSP-BF50x Blackfin Processor Hardware Reference
= 0 selects the rising edge of
= 1 in the
SPORT_RCR1
to sample data and externally gener-
= 1 in the
TCKFE
in the transmitter and
TCKFE
SAMPLE
EDGE
B0 B1 B2 B3
B0 B1 B2 B3
= 0, Transmit and Receive Con-
RCKFE
to
TSCLK
register
to drive
RSCLK
to
RSCLK
regis-
SPORT_TCR1
RCKFE