Analog Devices ADSP-BF535 Blackfin, Hardware Reference Manual

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Setting SPORT Modes
11-8 ADSP-BF535 Blackfin Processor Hardware Reference
Setting SPORT Modes
SPORT configuration is accomplished by setting bit and field values in
configuration registers. Each SPORT must be configured prior to being
enabled. Once the SPORT is enabled, further writes to the SPORT con-
figuration registers are disabled (except for the
SPORTx_TSCLKDIV
and
SPORTx_RSCLKDIV
registers, which can be modified while the SPORT is
enabled). To change values in all other SPORT configuration registers,
disable the SPORT by clearing
TSPEN
in
SPORTx_TX_CONFIG
and/or
RSPEN
in
SPORTx_RX_CONFIG
.
Each SPORT has its own set of control registers and data buffers. These
registers are described in detail in the following sections.
The SPORT control registers are programmed by writing to the appropri-
ate address in memory. All control and status bits in the SPORT registers
are active high unless otherwise noted.

Most configuration registers can only be changed while the
SPORT is disabled (
TSPEN/RSPEN=0
). Changes take effect after the
SPORT is re-enabled. The only exceptions to this rule are the
TSCLKDIV/RSCLKDIV
registers and multichannel configuration
registers.
SPORT Registers
The following sections describe the SPORT registers.