ML2502 Ver la hoja de datos (PDF) - Oki Electric Industry

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ML2502

RECORD/PLAYBACK LSI with 128Kbit Analog Cell Storage Flash Memory

Oki Electric Industry 

OKI

1.2 Phrase 1 Playback Operation

ML2502

(1) Input a “H” pulse to the PLAY1 pin to power up and start playback from the top address of the

memory.

(2) The LSI automatically ends playback when the last address of the recorded phrase has been

reached.

(3) The LSI automatically shifts to low-power consumption mode after playback ends.

(4) To stop playback of phrase 1 before reaching the last address, input a “H” pulse again to

the PLAY1 or PLAY2 pin. This will cause the LSI to stop playback and then automatically

shift to low-power consumption mode.

(5) During playback operation signal input to the PLAY1 or PLAY2 pin only is valid, any other

signal input is disregarded

PLAY1

Start Pulse

Stop Pulse

PLAY2

MON

Status Power Down Powering Up

Playing Back

Powering Down Power Down

Figure 1.2 Timing Chart for Phrase 1 Playback Operation

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.

ERASE

Start Pulse

REC1

MON

Status Power Down Powering Up

Erasing

Powering Down Power Down

Figure 1.3 Timing Chart for Phrase 1 Erasing Operation

ML2502 Data Sheet (Revision 8.0)

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