Peripherals Routed Through the DAI
A-166 ADSP-214xx SHARC Processor Hardware Reference
26
(RO,
sticky)
DERR_B Channel B Error Status. When the SPORT is configured as a trans-
mitter, this bit provides transmit underflow status. As a transmitter
DERR_x bit indicates whether the SPORTx_FS signal (from an
internal or external source) occurred while the DXS_x buffer was
empty. The SPORTs transmit data whenever they detect a
SPORTx_FS signal.
0 = No SPORTx_FS signal occurred while TXSPxA/B buffer is
empty.
1 = SPORTx_FS signal occurred while TXSPxA/B buffer is empty.
When the SPORT is configured as a receiver, these bits provide
receive overflow status. As a receiver, DERR_x bit indicates whether
the SPORTx_FS signal (from an internal or external source) occurred
while the DXS_x buffer was full. The SPORTs receive data whenever
they detect a SPORTx_FS signal. As a receiver, it indicates when the
channel has received new data while the receive buffer is full. New
data overwrites existing data.
0 = No SPORTx_FS signal occurred while RXSPxA/B buffer is full.
1 = SPORTx_FS signal occurred while RXSPxA/B buffer is full.
28–27
(RO)
DXS_B Channel B Data Buffer Status. Indicates the status of the serial port's
receive channel B data buffer as follows:
00 = Empty
10 = Partially full
11 = Full
29
(RO,
sticky)
DERR_A Channel A Error Status. Indicates if the serial receive operation has
overflowed in the channel A data buffer.
31–30
(RO)
DXS_A Channel A Data Buffer Status. Indicates the status of the serial port’s
receive channel A data buffer as follows:
00 = Empty
10 = Partially full
11 = Full
Table A-86. SPCTLx Register Bit Descriptions (Packed and Multichannel)
(RW) (Cont’d)
Bit Name Description
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