HT38A5
12 Melody Music Generator
Features
·
Operating voltage: 2.4V~5.0V
·
Operating frequency: 8MHz
·
Two operating mode MCU control mode key control
·
Rang detect
·
Hook
·
Mono output
·
High D/A converter resolution: 16 bits
·
Polyphonic up to 8 notes
·
16-pin DIP, 20-pin SOP package
mode
·
Low voltage detect
·
Volume control
·
Hold key
General Description
The HT38A5 is a CMOS VLSI designed for musical in-
struments, especially 12 melody songs. The HT38A5 is
built-in with a controller and an WTS (Wave Table Syn-
thesizer).
The HT38A5 has applications in areas such as phone
ringtones, high function toys, musical boxes, doorbells
etc.
Block Diagram
3 2 K
´
1 6 - b it
R O M
8 - B it
M C U
2 0 8
´
8
R A M
M u ltip lie r /P h a s e
G e n e ra l
1 6 - B it
D A C
P A 0 ~ P A 7
O S C 1
O S C 2
R E S
V D
V S
V D
V S
S
D
D A
S A
A U D
Pin Assignment
P A 4
1
2
3
4
5
6
7
8
9
1 0
P A 5
P A 4
1
2
3
4
5
6
7
8
P A 5
P A 6
P A 7
V S S
V D D
V D D A
T E S T
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
P A 3
P A 2
P A 1
P A 0
O S C 2
O S C 1
R E S
A U D
P A 6
P A 7
V S S
V S S A
V D D
N C
V D D A
T E S T
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
P A 3
P A 2
P A 1
P A 0
N C
O S C 2
O S C 1
N C
R E S
A U D
H T 3 8 A 5
1 6 D IP -A
H T 3 8 A 5
2 0 S O P -A
Rev. 1.00
1
November 2, 2006
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
