Rainbow Electronics aP8910A - Manual (Page 10)

Integrated Circuits Inc. aP8921A/10A
Ver 2.0 Dec 6, 2006 10
TRIGGER MODES
Two trigger modes, the KEY and CPU modes, are available for aP8921A/10A series which are
determined by setting the EPORM programmable options during voice data compilation.
For both trigger modes, up to 12 Voice Groups are being played back according to the following
setting of trigger pins S1 to S4.
Voice Group S1 S2 S3 S4
1 HIGH NC NC NC
2 NC HIGH NC NC
3 NC NC HIGH NC
4 NC NC NC HIGH
5 HIGH HIGH NC NC
6 NC HIGH HIGH NC
7 NC NC HIGH HIGH
8 HIGH NC NC HIGH
9 HIGH HIGH HIGH NC
10 NC HIGH HIGH HIGH
11 HIGH NC HIGH HIGH
12 HIGH HIGH NC HIGH
Note: Where NC (open or no connection) should be replaced by a logic input LOW in CPU
Parallel Trigger Mode.
Key Trigger Mode
With this trigger mode, up to 12 Voice Groups are triggered by setting S1 to S4 to HIHG or NC in
different combinations. Each Voice Group can have its only independent trigger options (See Fig.
4, 5, 7 and 8 for trigger options definition).
Voice Groups can also be triggered sequentially by setting SBT pin to HIGH.