HT3015A
15 Latin Rhythm Generator
Pin Assignment
Features
Operating Voltage: 2.4V~5.0V
Directly drive an external transistor
Low stand-by current
15 rhythms triggered by 16 keys
3Hz LED flash output
24 pin dual-in-line package
General Description
The HT3015A is a single-chip PCM rhythm gen-
erator implemented in the CMOS technology.
The IC includes 16 keys and can generate 15
kinds of rhythm. While the IC is playing, an
LED flashes at a rate of 3Hz. Various types of
timbre and rhythm can be generated by coding
the internal ROM. The IC is offered in either a
dice form or 24 pin dual-in-line package.
Applications
Toys
Sound effect generators
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25th June '96
Block Diagram
Pad Coordinates
Unit:
m
Pad
No.
X
Y
Pad
No.
X
Y
1
1528.5
1728.5
13
1545
1771.5
2
1528.5
1411.5
14
1547
1414
3
1577
1762.5
15
1547
1718.5
4
1392
1762.5
16
1355.5
1768.5
5
91
1762.5
17
1170.5
1768.5
6
94
1762.5
18
985.5
1768.5
7
279
1762.5
19
798
1768.5
8
464
1762.5
20
776
1773.5
9
805
1771.5
21
961
1773.5
10
990
1771.5
22
1146.5
1773.5
11
1175
1771.5
23
1331.5
1773.5
12
1360
1771.5
Chip size: 3450
3920 (
m)
2
* The substrate should be connected to VSS in the PCB layout artwork.
HT3015A
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25th June '96
Pin Description
Pin No.
Pin Name
I/O
Internal
Connection
Description
1~6,
15, 24
KEY1~KEY16
I
Pull-High
Trigger keys, low active, retriggerable keys
7
NC
--
--
No connection
8
VDD
I
--
Positive power supply
9
AUD
O
PMOS
Output
Voice output for driving an external transistor
10
OSCO
O
--
Oscillator output pin
11
OSCI
I
--
Oscillator input pin
12
FLAG
O
NMOS
Open Drain
3Hz flash, low active output, open drain
13
VSS
I
--
Negative power supply (GND)
14
TEST
I
Pull-High
For IC test only
Absolute Maximum Ratings
Supply Voltage .............................. 0.3V to 6.0V
Storage Temperature................. 50
C to 125
C
Input Voltage................. V
SS
0.3V to V
DD
+0.3V
Operating Temperature................... 0
C to 70
C
Electrical Characteristics
(Ta=25
C)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
DD
Condition
V
DD
Supply Voltage
--
--
2.4
--
5.0
V
I
DD
Operating Current
3V
No load
--
200
400
A
I
STB
Stand-by Current
3V
--
--
1
5
A
I
AUD
Max. AUD Output Current
3V
V
OH
=0.6V
1.5
2
--
mA
I
OL
FLAG Sink Current
3V
V
OL
=0.3V
1.5
3.0
--
mA
V
IL
"L" Input Voltage
--
--
--
--
0.2V
DD
V
V
IH
"H" Input Voltage
--
--
0.7V
DD
--
--
V
F
OSC
System Frequency
3V
R
OSC
=100K
--
180
--
KHz
HT3015A
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25th June '96
Timing Diagram
Functional Description
KEY2~KEY16
KEY2~KEY16 can individually play a section of
the 15 built-in demo-rhythms 4 times continu-
ously. Their corresponding rhythms are as fol-
lows:
KEY No.
Rhythm
KEY2
Latin fusion 1
KEY3
Latin fusion 2
KEY4
Latin ballad 1
KEY5
Latin ballad 2
KEY6
Latin ROCK 1
KEY7
Latin ROCK 2
KEY8
Latin fusion 3
KEY9
Samba 1
KEY10
Samba 2
KEY11
Son afro
KEY12
Mambo
KEY13
Latin ROCK 3
KEY14
Rhumba
KEY15
Cha Cha
KEY16
Samba 3
KEY1
KEY1 is a sequential input key. Pressing this
key once plays the first rhythm, and re-pressing
it plays the second rhythm, and so forth. Any
key of KEY2~KEY16 can be pressed to reset
KEY1 (return to the first section of the first
group).
KEY priority
KEY1 > KEY2 > KEY3 > .......... > KEY15 >
KEY16
KEY features
Pull-high resistance: 100k
Key-in debounce time: 22 ms
FLAG
3Hz flashing LED output during the playing of
the IC, active low, NMOS open drain output
HT3015A
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25th June '96
Application Circuits
Chip form
HT3015A
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25th June '96
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