Rainbow Electronics aP89085 - Manual (Page 6)

Integrated Circuits Inc. aP89341/170/085
Ver 2.1 5 Aug 24, 2006
Programmable Options
In Key Trigger Mode (M1=0; M0=0) and CPU Parallel Trigger Mode (M1=0; M0=1), user can select
different trigger functions and output signals to be sent out from the pins OUT1, OUT2 and OUT3.
Options that affect all Voice Group playback are called Whole Chip Options. Options that only affect
the playback of individual Voice Group are called Group Options.
Whole Chip Options
•
Long (16ms) or short (65us) debounce time at 8KHz sampling rate.
•
Ramp-up-down enable or disable:
When COUT is used for playback, Ramp-up-down should be enabled. This function eliminates
the ‘POP’ noise at the begin and end of voice playback.
When VOUT1 and VOUT2 are used to drive speaker directly, Ramp-up-down should be
disabled.
Fig. 1 Ramp-up-down Enable Fig.2 Ramp-up-down Disable
•
Output Options:
This option sets up the three output pins OUT1, OUT2 and OUT3 to send out different signals
during voice playback. Four settings are allowed:
OUT1 OUT2 OUT3
Option 1 LED1 LED2 BUSY
Option 2 STOP LED1 LED2
Option 3 LED1 BUSY STOP
Option 4 LED1 BUSY BUSYB
Note: BUSY can be set or reset associated with each Voice Block. Stop plus must be set to
enable in order to have STOP plus to come out at the end of playback.
Fig. 3 Output waveforms