OKI
ML2502 Demo Board
5
1-3. Phrase 1 Erasing Operation
(1)
While inputting “H” level to the ERASE pin, input a “H” pulse to the REC1 pin to
start erasing Phrase 1.
(2)
After Phrase 1 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 Phrase 1 by recording “Silence” from the
top address 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 1.3 Timing Chart for Phrase 1 Erasing Operation
1-4. Phrase 2 Recording Operation
(1)
Keep on inputting “H” level to the REC2 pin to power up and start recording from
the top address of the memory. Recording goes on while the REC2 pin being
held “H” level.
(2)
The LSI automatically ends recording when the last address of the memory has
been reached.
(3)
The LSI automatically shifts to low-power consumption mode after recording
ends.
(4)
To stop recording for Phrase 2 before reaching the last address, bring the REC2
pin down to “L” level. The LSI automatically shifts to low-power consumption
mode after recording stops.
(5)
During recording operation any signal input to other pins than the REC2 is
disregarded.
Note: Re-recording always causes to overwrite the existing recording data for a given
phrase.
Start Pulse
Power Down
Powering Up
Erasing
Power Down
Powering Down
MON
REC1
ERASE
Status
