AP8821 APLUS [Aplus Intergrated Circuits], AP8821 Datasheet - Page 4

• Manufacturer Part Number: AP8821
• Description: 21 sec VOICE OTP
• Manufacturer: APLUS [Aplus Intergrated Circuits]

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.
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.
All those Options and Output selections can be set with a dedicated OTP compiler and programmer
software supplied by APLUS.
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
Group1
Group2
Group3
Group4
Group5
Group6
Group7
Group8
Output Selections
Software Support
Key trigger mode and CPU trigger mode
S4
0
0
0
0
0
0
0
0
1.
2.
3.
4.
S3
0
0
0
0
1
1
1
1
Integrated Circuits Inc.
S2
0
0
1
1
0
0
1
1
OUT1
LED2
STOP
LED1
LED1
S1
0
1
0
1
0
1
0
1
4
Group10
Group11
Group12
Group13
Group14
Group-n
Group9
X
X
OUT2
BUSY
BUSY
LED1
LED1
S4
1
1
1
1
1
1
1
1
S3
/BUSY
OUT3
0
0
0
0
1
1
BUSY
1
1
LED2
STOP
aP8821
S2
0
0
1
1
0
0
1
1
S1
0
1
0
1
0
1
0
1