FEDL2502-03
OKI Semiconductor
ML2502
Single-Phrase Recording/Playback Mode
Recording Operation
(1) In Single-Phrase Recording/Playback mode, you can control the recording operation with the REC1 pin
connected to the REC2 pin. To power up the LSI and start recording from the top address of the memory,
keep inputting “H” level to the REC1 and REC2 pins. Recording goes on while the REC1 and REC2 pins stay
“H”.
(2) The LSI automatically stops recording when the last address of the memory has been reached.
(3) When recording is complete, the LSI automatically powers down, entering a low-power-consumption state.
(4) To stop recording half way, bring the REC1 and REC2 pins to “L” level. When recording is complete, the LSI
automatically powers down, entering a low-power-consumption state.
Note 1: Recording operation lets the LSI overwrite the existing data, which means the previously recorded data is
erased whenever new recording is made.
Note 2: Inputting a “H” pulse to the PLAY1 or PLAY2 pin during record operation causes the LSI to stop
recording. To start recording again, bring the REC1 and REC2 pins to “L” level once and then input “H” level.
Stop recording
Start recording
REC1
and
REC2
MON
Power Down Powering UP
Recording
Power Down
Shifting to Power-down
Post-Recording Process
Figure 15 Timing Chart of Recording Operation in Single-Phrase Recording Mode
Restart
recording
REC1
and
REC2
Invalid at Falling Edge
Invalid during “H” Level
Stop recording
PLAY1
or
PLAY2
MON
Shifting to Power-down
Power Down
Recording
Recording
Powering Up
Post-Recording Process
Figure 16 Timing Chart of Recording Stop Operation in Single-Phrase Recording Mode
11/31
OKI [ OKI ELECTRONIC COMPONETS ]
