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PDF HT3421A Data sheet ( Hoja de datos )
| Número de pieza | HT3421A | |
| Descripción | 41 Matrix Key Multi-Function Piano | |
| Fabricantes | Holtek | |
| Logotipo |  |
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HT3421A
41 Matrix Key Multi-Function Piano with a Memory
Features
• Operating voltage: 2.4V~5V
• System operating frequency: 512KHz
• 12 × 7 matrix input keys
• Auto power-off
• Power ON/OFF toggle input
• 41 tones, tone area: G2~B5
• 8 rhythms
General Description
The HT3421A is a 41-key musical instrument
LSI implemented in the CMOS technology. The
chip provides 8 rhythms, 8 timbres, 4 pulsatile
sounds, 12 demo songs, and a 62-note memory
storage function. The 12 × 7 matrix control keys
of the HT3421A control both basic keys and
function selection inputs.
Pin Assignment
• 8 timbres
• 16 steps of tempo speed
• 4 pulsatile sounds
• 12 demo songs
• Memory function with 62 notes
• 40 pin dual-in-line package
In the Memory mode, the chip can store a tone
of 62 notes. Pressing of the Replay key plays the
stored songs, or pressing of OKP1 or OKP2
plays the stored songs tone by tone.
In the Demo mode, one of the 12 demo songs can
be played. The timbre of the demo song can also
be altered according to the instrument chosen.
1 28th June ’96
Free Datasheet http://www.datasheet4u.com/
1 page  
HT3421A
Pin No. Pin Name I/O
15~26
27
28
29
30
31
R1~R12
TEST5
TEST2
MEMO
TEST1
RESET
I
—
—
I
—
I
32 ON/OFF I
33
BUSY
O
34 VSS
I
35
MODE
I
36 OSC1 I
37
OSC2
O
38
MLED
O
39
TLED
O
40 VDD
I
Internal
Connection
Description
CMOS
Pull-High
Matrix control key scanning inputs
— For IC test only
— For IC test only
CMOS Connect this pin to VSS/VDD to work in either the
Pull-High memory or play mode.
— For IC test only
CMOS
Pull-High
Power on reset
CMOS
Pull-High
At power on, the system is in the OFF state. Press
the ON/OFF key to alternate the system from OFF
to ON or vice versa. When power is auto off, there
will be no tone output for 5 minutes.
CMOS
BUSY is high while the system is operating, but low
when the system is in the stand-by state.
— Power supply (ground)
CMOS Toggle selection of play mode or memory mode
Pull-High The system is in the play mode at power-on.
— Oscillator input
— Oscillator output
NMOS
Open Drain
Memory mode indication output
NMOS
Open Drain
Tempo indication output
— Power supply (positive)
Absolute Maximum Ratings
Supply Voltage ..............................–0.3V to 5.5V
Input Voltage................. VSS–0.3V to VDD+0.3V
Storage Temperature................. –50°C to 120°C
Operating Temperature................... 0°C to 70°C
5 28th June ’96
Free Datasheet http://www.datasheet4u.com/
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HT3421A.PDF ] | |
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