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Preliminary
PCM AUDIO INTERFACE
S3C2451X RISC MICROPROCESSOR
28-16
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
PCM_IRQ_STATn Bit
Description
Initial
State
TXFIFO_ERROR
_OVERFLOW
[6]
Interrupt is generated for TX FIFO overflow ERROR.
This occurs whenever the TX FIFO is written when it is already
full. This is considered as an ERROR and will have unexpected
results
1: IRQ is occurred.
0: IRQ is not occurred.
0
RXFIFO_EMPTY [5]
Interrupt is generated whenever the RX FIFO is empty
1: IRQ is occurred.
0: IRQ is not occurred.
0
RXFIFO_ALMOST
_EMPTY
[4]
Interrupt is generated whenever the RX FIFO is ALMOST
empty.
1: IRQ is occurred.
0: IRQ is not occurred.
0
RX_FIFO_FULL [3]
Interrupt is generated whenever the RX FIFO is full
1: IRQ is occurred.
0: IRQ is not occurred.
0
RX_FIFO_ALMOST
_FULL
[2]
Interrupt is generated whenever the RX FIFO is ALMOST full.
1: IRQ is occurred.
0: IRQ is not occurred.
0
RXFIFO_ERROR
_STARVE
[1]
Interrupt is generated for RX FIFO starve ERROR.
This occurs whenever the RX FIFO is read when it is still empty.
This is considered as an ERROR and will have unexpected
results
1: IRQ is occurred.
0: IRQ is not occurred.
0
RXFIFO_ERROR
_OVERFLOW
[0]
Interrupt is generated for RX FIFO overflow ERROR.
This occurs whenever the RX FIFO is written when it is already
full. This is considered as an ERROR and will have unexpected
results
1: IRQ is occurred.
0: IRQ is not occurred.
0
NOTE:
More than one interrupt sources(which was set by PCM_IRQ_CTL register) can cause interrupt, at same
time(i.e, interrupt at PCM is OR-ed interrupt.) So in Interrupt Service Routine, user should check this
register bits which you set as interrupt sources.