Rainbow Electronics ISD18B12 - Manual (Page 7)

ISD18B12
Publication Release Date: August 31, 2007
- 7 - Revision A1
5.3. Edge-triggered playback ( PLAYE ) Operation :
• Playback starts from beginning of the memory and LEDP is on.
• Playback stops whenever end of message or a subsequent trigger occurs and LEDP is off.
• Then device will automatically power down.
Fig. 3 : Playback–Edge ( PLAYE ) function
Start Stop Start
T
Deb
T
r
T
f
T
Deb
T
P1
T
Deb
PlayE
SP+
SP-
LEDP
LEDR
T
P1
End of Message
5.4. Level- triggered playback ( PLAYL )Operation :
• Playback starts from beginning of the memory and LEDP is on.
• Playback stops whenever an EOM marker is reached or PLAYL returns to High and LEDP is off.
• Then device will automatically power down.
Fig. 4: Playback–Level ( PLAYL ) function
T
r
T
Deb
T
f
T
Deb
T
P1
PlayL
SP+
SP-
LEDP
LEDR
T
P1
End of Message
• Holding PLAYL Low constantly will perform looping playback function.
Fig. 5: Looping playback function via PLAYL