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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 x 7 matrix input keys Auto power-off Power ON/OFF toggle input 41 tones, tone area: G2~B5 8 rhythms * * * * * * 8 timbres 16 steps of tempo speed 4 pulsatile sounds 12 demo songs Memory function with 62 notes 40 pin dual-in-line package 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 x 7 matrix control keys of the HT3421A control both basic keys and function selection inputs. 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. Pin Assignment 1 28th June '96 HT3421A Block Diagram 2 28th June '96 HT3421A Pad Assignment Chip size: 179 x 214 (mil)2 * The IC substrate should be connected to VDD in the PCB layout artwork. 3 28th June '96 HT3421A Pad Coordinates Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Unit: mil X -82.17 -82.90 -82.90 -82.90 -82.90 -82.90 -82.90 -82.90 -82.90 -82.90 -70.32 -7.67 1.93 11.54 21.14 30.75 40.35 50.00 59.56 69.17 Y 100.34 -11.99 -28.56 -36.38 -44.03 -51.64 -63.33 -81.26 -92.95 -100.60 -100.60 -100.60 -100.60 -100.60 -100.60 -100.60 -100.60 -100.60 -100.60 -100.60 Pad No. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 X 82.85 82.85 82.85 82.85 82.85 82.85 83.19 83.70 83.70 83.70 82.85 69.08 61.01 52.93 2.61 -14.22 -40.65 -56.80 -66.24 -73.97 Y -100.60 -92.95 -82.24 -72.55 -64.90 -50.11 -42.20 0.81 8.80 27.84 100.00 100.34 100.34 100.34 100.68 100.68 100.68 100.68 100.34 100.34 Pin Description Pin No. Pin Name 1 2 3 4 5 6 7 8~14 OUT ENV TEST4 TEST3 S/H B/C VIB C7~C1 I/O O O -- -- O O O O Internal Connection Transmission Tone output Gate CMOS -- -- PMOS Open Drain PMOS Open Drain CMOS NMOS Open Drain Description Envelope effect output For IC test only For IC test only Snare-Drum or Hi-Hat pulsatile sound output Bass-Drum or Cow-Bell pulsatile sound output Vibrato ON: VIB provides a 4Hz signal output. Vibrato OFF: VIB is a low-level output. Matrix control key scanning outputs 4 28th June '96 HT3421A Internal Connection CMOS Pull-High -- -- CMOS Pull-High -- CMOS Pull-High CMOS Pull-High Pin No. Pin Name 15~26 27 28 29 30 31 R1~R12 TEST5 TEST2 MEMO TEST1 RESET I/O I -- -- I -- I Description Matrix control key scanning inputs For IC test only For IC test only Connect this pin to VSS/VDD to work in either the memory or play mode. For IC test only Power on reset 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. BUSY is high while the system is operating, but low when the system is in the stand-by state. Power supply (ground) Toggle selection of play mode or memory mode The system is in the play mode at power-on. Oscillator input Oscillator output Memory mode indication output Tempo indication output Power supply (positive) 32 ON/OFF I 33 34 35 36 37 38 39 40 BUSY VSS MODE OSC1 OSC2 MLED TLED VDD O I I I O O O I CMOS -- CMOS Pull-High -- -- NMOS Open Drain NMOS Open Drain -- Absolute Maximum Ratings Supply Voltage ..............................-0.3V to 5.5V Input Voltage................. VSS-0.3V to VDD+0.3V Storage Temperature................. -50C to 120C Operating Temperature................... 0C to 70C 5 28th June '96 HT3421A Electrical Characteristics Symbol VDD ISTB IDD IOL1 IOL2 IOH1 IOH2 IOL3 IIL IOH3 IOL4 IOL5 VIL VIH FOSC (Ta=25C) Parameter Operating Voltage Stand-by Current Operating Current Tone Output Sink Current S/H (B/C) Output Source Current Vibrato Output Source Current C1~C7 Output Sink Current R1~R12 Input Low Current MLED Output Sink Current TLED Output Sink Current "L" Input Voltage "H" Input Voltage System Frequency Test Condition VDD -- 4.5V 4.5V 4.5V Condition -- -- No load VOL=0.45V VOL=0.45V VOH=4V VOH=4V VOL=0.45V VIL=0.45V VOH=4V VOL=0.45V VOL=0.45V -- -- ROSC=48K Min. 2.4 -- -- 2.6 5 -1.2 -0.6 1.8 -0.12 -1.8 1.2 1 -- 0.7VDD -- Typ. 4.5 5 0.3 4.4 8.6 -1.8 -1 3.0 -0.2 -3 2.0 1.8 -- -- 512 Max. 5 10 1 -- -- -- -- -- -- -- -- -- 0.2VDD -- -- Unit V A mA mA mA mA mA mA mA mA mA mA V V KHz Envelop Output Sink Current 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V -- -- 4.5V BUSY Output Source Current 4.5V Functional Description Matrix control key position & description C1 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 K31 K32 K33 K34 K35 K36 K37 K38 K39 K40 K41 -- C2 K19 K20 K21 K22 K23 K24 K25 K26 K27 K28 K29 K30 C3 K7 K8 K9 K10 K11 K12 K13 K14 K15 K16 K17 K18 C4 Bass Bell Snare Hat -- -- K1 K2 K3 K4 K5 K6 C5 Tmp up Tmp down Rhm ON Rhm Rhm OFF Demo Vib Sust Memo clear Replay OKP1 OKP2 C6 Tim1 Tim2 Tim3 Tim4 Tim5 Tim6 Tim7 Tim8 -- -- -- -- C7 Rhm1 Rhm2 Rhm3 Rhm4 Rhm5 Rhm6 Rhm7 Rhm8 -- -- -- -- 6 28th June '96 HT3421A Key Name Description Scale from G2 to B5 There is a half-pitch variation among K1~K41. If a key is pressed and held and the other key is pressed as well, the later tone will replace the former tone. Refer to item 2 for the contrast keyboard position. Bass drum sound select input Pressing this key adds a single note bass drum sound. Cow bell sound select input Pressing this key adds a single note bell sound. Snare drum sound select input Pressing this key adds a single note snare drum sound. Hi-Hat sound select input Pressing this key adds a single note hi-hat sound. 16-level tempo speed selection Set to level 8 at power-on Tempo will speed up while pressing this key until the maximal speed is reached. Pressing this key lowers the tempo speed until the minimum speed is reached. Rhythm enabled Set to OFF at power-on Rhythm enable/disable toggle selection Rhythm disabled Selection of demo song playing One of the provided 12 demo songs can be chosen by pressing the corresponding key (see section 3 for details). If no key is pressed the first song will be chosen instead. Vibrato effect ON/OFF toggle selection Set to OFF at power-on Sustain effect ON/OFF toggle selection Set to ON at power-on Clear the contents of the memory Used only in the Memory mode Press this key to re-play the song (in memory). This key functions as a Replay function, but it plays only one tone. Timbre selection It is set to Tim1 at power-on (refer to 4 for the instrument names). Rhythm selection It is set to Rhm1 at power-on (refer to 5 for the rhythm names). K1~K41 Bass Bell Snare Hat Tmp up Tmp down Rhm ON Rhm Rhm OFF Demo Vib Sust Memo clear Replay OKP1, OKP2 Tim1~Tim8 Rhm1~Rhm8 7 28th June '96 HT3421A K1~K41 and their corresponding keyboard tone outputs are as shown: Demo songs and corresponding keys First, press the Demo key to enter the Demo mode, and then press a key to select a song. No. 1 2 3 4 5 6 7 8 9 10 11 12 Select Key K18 K20 K22 K23 K25 K27 K29 K30 K32 K34 K35 K37 Demo Song Name American Patrol It Is a Small World Old Macdonald Had a Farm Yankee Doodle This Old Man Wooden Heart Happy Birthday to You Silent Night Home Sweet Home Symphony No. 9 Mary Had a Little Lamb Twinkle Twinkle Little Star While the demo song is playing, other "Select keys" can be pressed to alter the song. The timbre of the demo song can be changed by pressing Tim1~Tim8. Pulsatile sounds can be added by pressing the Bass, Bell, Snare, or Hat input. During the playing of a song, pressing the demo song key will terminate the output. The following is a list of the 8-instrument timbre: Key Tim1 Tim2 Tim3 Tim4 Tim5 Tim6 Tim7 Tim8 Instrument Piano Oboe Ukulele Flute Trumpet Saxophone Music Box Church Bell 8 28th June '96 HT3421A The 8-rhythm list is as shown: MEMO Action Key Rhm1 Rhm2 Rhm3 Rhm4 Rhm5 Rhm6 Rhm7 Rhm8 Memory mode Rhythm Chacha March Rock Swing 8 Beat Beguine Ballad Waltz Initially in the play mode but VDD or Open MODE switch can toggle between play/memory VSS In the memory mode only, and MODE switch has no effect In the memory mode, each sequential pressing of K1~K41 (G2~B5) will be stored, except the rhythm and pulsatile sounds. Pressing of the Memo clear key will erase the contents of the memory. In either the play or memory mode, the stored song can be played by pressing the Replay key or the stored song is played tone by tone by pressing OKP1 or OKP2. While in the memory mode, the demo song can be played by pressing the Demo key. Once the demo mode is quit, the system will return to the memory mode. The system enters the memory mode by using either the MEMO or MODE switch. The indicator LED will also indicate the system is in the memory mode. This toggle action MODE switch is effective only if the MEMO switch is connected to VDD or left open. The MEMO switch has an overiding effect and functions irrespective of the condition of the MODE switch. 9 28th June '96 HT3421A Application Circuit 10 28th June '96 |
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