OKI
ML2502 Demo Board
9
Figure 2.2 Timing Chart for Single-phrase Playback Operation
2-3. Erasing the Phrase 2
(1)
While inputting “H” level to the ERASE pin, input “H” pulses to the REC1 and
REC2 pins simultaneously to start erasing the phrase.
(2)
After the phrase having been erased, the LSI automatically shifts to power-down
mode for low-power consumption.
Note: Erasing operation cannot be abandoned in the middle once getting started.
Internally, the LSI performs erasing by recording “Silence” from the top
address as far as to address 250. Therefore, if you attempt to playback the
erased phrase, the playback starts at the top address of the memory and ends
at address 250.
Figure 2.3 Timing Chart for Single-phrase Erasing Operation.
Start Pulse
Stop Pulse
Invalid Input
Power Down
Powering Up
Playing Back
Power Down
Powering Down
MON
REC2
REC1
Status
PLAY2
PLAY1
Start Pulse
Power Down
Powering Up
Erasing
Power Down
Powering Down
MON
REC1
ERASE
Status
REC2
