AP8821 Datasheet, PDF (4/13 Pages) Aplus Intergrated Circuits – 21 sec VOICE OTP

Integrated Circuits Inc. aP8821
„Output Selections
There are three independent output pins OUT1, OUT2 and OUT3, available for four combinations of
LED1, LED2, STOP and BUSY signals for each voice group.
OUT1
OUT2
OUT3
1.
LED2
LED1
BUSY
2.
STOP
LED1
LED2
3.
LED1
BUSY
STOP
4.
LED1
BUSY
/BUSY
LED1 and LED2 are complemented outputs flashing at a fix interval. STOP pulse gives a long
enough positive pulse at the end of the playback for each group with option to enable or disable it.
BUSY is active high depends on voice Block setting. That means BUSY signal can be set to high
when some voice Blocks are being played but set to low for the others.
„Software Support
All those Options and Output selections can be set with a dedicated OTP compiler and programmer
software supplied by APLUS.
„Key trigger mode and CPU trigger mode
In Key trigger mode, S1 to S4 will trigger four voice groups. The rest of the voice groups can only be
triggered by SBT sequential trigger pin.
In CPU trigger mode, binary data is input to S4~S1. A high pulse is input to SBT pin with pulse
width equal to or longer than the debounce time to strobe the data to initial the playblack. Data
patterns “1110” and “1111” is not allowed.
Group-n S4
S3
S2
S1 Group-n S4
S3
S2
S1
Group1 0
0
0
0 Group9 1
0
0
0
Group2 0
0
0
1 Group10 1
0
0
1
Group3 0
0
1
0 Group11 1
0
1
0
Group4 0
0
1
1 Group12 1
0
1
1
Group5 0
1
0
0 Group13 1
1
0
0
Group6 0
1
0
1 Group14 1
1
0
1
Group7 0
1
1
0
X
1
1
1
0
Group8 0
1
1
1
X
1
1
1
1
4