FEDL2302DIGEST-05
OKI Semiconductor
ML2302
READING STATUS
The ML2302 supports the following seven status flags.
Table 4.1
Pin
D7
D6
D5
D4
D3
D2
D1
D0
Status
Data Recording/Playing flag
Don’t Care
Description
High when recording or playback is in progress
Pause flag
High when playback of left voice is paused
Don’t Care
EMP Information Output flag
MID Information flag
FUL Information flag
Data Transfer Error flag
Output the same signal as the EMP pin. Note)
Output the same signal as the MID pin. Note)
Output the same signal as the FUL pin. Note)
See “Data Transfer Errors”.
Note: EM, MID, and FUL are either at the active “H” or at the active “L” by setting the signal output format by
the command. The status signals on D3 to D1 are determined depending on the status of the FIFOST pin as
shown below.
FIFOST = “0”
EMP signal for playback FIFO
MID signal for playback FIFO
FUL signal for playback FIFO
FIFOST = “1”
EMP signal for recording FIFO
MID signal for recording FIFO
FUL signal for recording FIFO
D3
D2
D1
Data Transfer Errors
The Data Transfer flag supports the following four errors.
(1) “H” when data is read while EMP for recording FIFO is “H”
(2) “H” when data is written while FUL for playback FIFO is “H”
(3) “H” when a command is written while CBUSY is “L”.
(4) “H” when recording data cannot be written in FIFO while FUL for recording FIFO is “H”.
*These four errors are released when a normal transfer described below is carried out.
(1) Reads data while EMP for recording FIFO is “L”.
(2) Writes data while FUL for playback FIFO is “L”.
(3) Writes a command while CBUSY is “H”.
(4) The error flag is released when data is written in recording FIFO within LSI after reading data from recording
FIFO and setting FUL for recording FIFO to “L”.
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