PCM-3718 Series User Manual
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4.13 FIFO status - BASE+19H (PCM-3718HO only)
The register at BASE+19H clears the FIFO buffer and sets its empty flag
(EF). The FIFO status register, address BASE+19H, has flags which you
can read to determine the current state of the FIFO buffer, including full
flag, half- full flag, and empty flag.
EF
FIFO empty flag
1 FIFO
is
empty
0
FIFO is not empty
HF
FIFO half-full flag
1
FIFO is half- full or more than half- full
0
FIFO is less than half- full
FF
FIFO full flag
1
FIFO is full
0
FIFO is not full
4.14 FIFO Clear - BASE+19H
Writing any value to BASE+19H clears all data in the FIFO and sets the
empty flag (EF) to 1.
Table 4.5: Register for FIFO Status
Read
FIFO status
Bit#
7
6
5
4
3
2
1
0
BASE+19H
FF
HF
EF
Table 4.6: Register for FIFO Clear
Write
FIFO clear
Bit#
7
6
5
4
3
2
1
0
BASE+19H
X
X
X
X
X
X
X
X
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