Sport Operation Modes - Analog Devices ADSP-21261 SHARC Hardware Reference Manual

SPORT Operation Modes

Serial ports operate in four modes:
• Standard DSP Serial mode, described in
Mode" on page 9-11
• Left-justified Sample Pair mode, described in
ple Pair Mode" on page 9-14
2
• I S mode, described in
• Multichannel mode, described in
page 9-24

Bit names and their functionality change based on the SPORT
operating mode. See the mode specific section for the bit names
and their functions.
The SPORT operating mode can be selected via the
Table 9-1 for a summary of the control bits as they relate to the four oper-
ating modes.
The operating mode bit (
mode, Left-justified Sample Pair mode, and non-I
Port/Multichannel mode). In non-I
the register enables the A channels and the
SPMCTLxy
register enables the B channels. In addition to these bits, the
SPMCTLxy
Data Direction bit (
receiver in non-multichannel mode.
If the bit is set (= 1), the SPORT becomes a transmitter and all the
SPTRAN
other control bits are defined accordingly. Similarly, when
SPORT becomes a receiver.

Companding is not supported in I
modes.
ADSP-2126x SHARC Processor Hardware Reference
"I2S Mode" on page 9-18
) of
OPMODE SPCTLx
2
S Multichannel mode, the
) selects whether the port is a transmitter or
SPTRAN
"Standard DSP Serial
"Left-Justified Sam-
"Multichannel Operation" on
SPCTLx
register selects between I
2
S mode (DSP Serial
bit in the
MCEB
SPTRAN
2
S and Left-justified Sample Pair
Serial Ports
register. See
2
S
bit in
MCEA
= 0, the
9-9