Rainbow Electronics ISD14B20 - Manual (Page 10)

ISD14B20
Publication Release Date: October 9, 2007
- 10 - Revision 0
5.1.2. Edge-triggered Playback ( PlayE ) Operation
• Low active input, edge-trigger, toggle on-off, debounce required.
• Playback begins from the start address to end address or EOM, whichever is occurred first.
• At the end of message,
LED pulses Low momentarily.
• Then device will automatically power down.
• During playback, a subsequent trigger terminates the playback operation. If EOM marker is not encountered,
then LED will not pulses Low momentarily.
• This pin has an internal pull-up device.
• Once
PlayE is active, input on PlayL , REC , FT , / NORM MODE , , , , , , ,
or is banned.
S0 S1 S2 S3 E0 E1 E2
E3
Fig. 4 : Playback–Edge ( PlayE ) function
PlayE
Sp+
Sp-
End of
Message
LED
<S3:S0>
<E3:E0>
Norm/Mode
T
Deb
T
ASet
Stop
Start Start
T
Settle2
T
AHold
T
Deb
T
EOM
T
AHold
T
ASet
T
Deb
5.1.3. Level- triggered Playback ( PlayL )Operation
• Low active input, Level-hold, debounce required.
• Once active, playback begins from the start address and stops whenever
PlayL returns to High. When
an EOM is encountered, LED pulses Low momentarily.
• Then device will automatically power down.
• This pin has an internal pull-up device.
• Once
PlayL is active, input on PlayE , REC , FT , / NORM MODE , , , , , , ,
or is prohibited.
S0 S1 S2 S3 E0 E1 E2
E3
Fig. 5: Playback–Level ( PlayL ) function