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MSM9802 Datasheet(PDF) 33 Page - OKI electronic componets |
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MSM9802 Datasheet(HTML) 33 Page - OKI electronic componets |
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33 / 52 page  33/51 MSM9802/03/05-xxx ¡ Semiconductor 4. Generating Pseudo-BUSY Signal through NAR Pin If the application in use requires a BUSY signal when this IC is used in microcontroller interface mode, a pseudo-BUSY signal can be generated through the NAR pin by controlling signal timing, as shown below. 4.1 When edit ROM is not used I5-I0 ST NAR (Pseudo-BUSY) AOUT tDAR Phrase 1 01 (Phrase 1) 02 (Phrase 2) 03 (Phrase 3) 04 (Silence phrase of 32 ms or more) 30ms or more 30ms or more 30ms or more tNAB tNAB tNAB Phrase 2 Phrase 3 tDAF tSTB Silence phrase 4.2 When edit ROM is used I5-I0 ST NAR (Pseudo-BUSY) AOUT tDAR Phrase 1 01 (Phrases 1+2+3) 02 (Silence phrase of 32 ms or more) 30ms or more tBLN tNAB Phrase 2 tDAF tSTB Silence phrase tBLN Phrase 3 |
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