Analog Devices ADSP-BF506F Hardware Reference Manual page 908

SPORT Registers

All SPORT control registers should be programmed before
set. Typical SPORT initialization code first writes all control regis-
ters, including DMA control if applicable. The last step in the code
is to write
.
TSPEN
• Internal transmit clock select. (
transmit clock (if set) or the external transmit clock on the
pin (if cleared). The
external clock is selected.
• Data formatting type select. The two
mats used for single and multichannel operation.
• Bit order select. (
the data words transmitted over the SPORT.
• Serial word length select. (
ber of bits in each word transmitted over the SPORTs) is
calculated by adding 1 to the value of the
Serial Word Length =
The
SLEN
values for this field. Three common settings for the
15, to transmit a full 16-bit word; 7, to transmit an 8-bit byte; and
23, to transmit a 24-bit word. The processor can load 16- or 32-bit
values into the transmit buffer via DMA or an MMR write
instruction; the
to shift out of the register over the serial link. The SPORT always
transfers the

The frame sync signal is controlled by the
SPORT_RFSDIV
on each byte or word transmitted, the proper frame sync divider
19-50
with all of the necessary bits, including
SPORT_TCR1
TCLKDIV
). The
TLSBIT
SLEN
SLEN
field can be set to a value of 2 to 31; 0 and 1 are illegal
field tells the SPORT how many of those bits
SLEN
+1 lower bits from the transmit buffer.
SLEN
registers, not by
ADSP-BF50x Blackfin Processor Hardware Reference
). This bit selects the internal
ITCLK
MMR value is not used when an
bits specify data for-
TDTYPE
bit selects the bit order of
TLSBIT
). The serial word length (the num-
field:
SLEN
+ 1;
SPORT_TFSDIV
. To produce a frame sync pulse
SLEN
is
TSPEN
TSCLK
field are
SLEN
and