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I1806P Fiches technique(PDF) 11 Page - Winbond |
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I1806P Fiches technique(HTML) 11 Page - Winbond |
11 / 26 page I1800 SERIES 8. RECLED operation The RECLED output pin provides an active-LOW signal, which can be used to drive an LED as a “record-in-progress” indicator. It returns to a HIGH state when the REC pin is released LOW or when the recording is completed due to the memory being filled. This pin also pulses LOW to indicate the end of a message has been reached. 9. ROSC operation The duration of the device can be varied by changing the value of R2 (ROSC). This means the I1800 device can actually be between 6 to 16 seconds duration. See the curve below, which charts typical durations when the ROSC is varied from 80 KΩ to 160 KΩ. This feature allows frequency shifting where a recorded voice or sound can be played back faster or slower than normal for special effects. For example, use a 100 KΩ resistor to make the recording and then playback with either an 80 KΩ resistor for faster “chipmunk” talk or with a 120 KΩ resistor for a slower, lower voice. Another feature is a “Pause” or interrupt function that can be done by taking the ROSC resistor to VCC to stop playback momentarily, resuming when the resistor is connected back to ground. Chart 1: ISD Duration Versus ROSC at TA = 25°C and VCC = 3.0V 80 100 120 140 160 Typical R OSC (K ) I18 10 I18 06 Ω Publication Release Date: May 2003 - 11 - Revision 0.0 |
Numéro de pièce similaire - I1806P |
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Description similaire - I1806P |
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