Rainbow Electronics aP89010 - Manual (Page 6)

Integrated Circuits Inc. aP89021/010
Ver 2.0 Dec 6, 2006 6
Programmable Options
In both Key Trigger Mode and CPU Parallel Trigger Mode, user can select different trigger functions
and output signals to be sent out from the pins OUT1, OUT2 and OUT3.
Options affect all Voice Group playback are called Whole Chip Options. Options only affect the
playback of individual Voice Group are called Group Options.
Whole Chip Options
•
Key or CPU Parallel Trigger Mode.
•
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 beginning 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 and OUT2 to send out different signals during
voice playback. Four settings are allowed:
OUT1 OUT2 OUT3
Option 1 LED2 LED1 BUSY
Option 2 STOP LED1 LED2
Option 3 LED1 BUSY STOP
Note: Stop plus must be set to enable in order to have STOP plus to come
out. The BUSY output is always HIGH during voice playback.
Fig. 3 Output waveforms