Pin No.

Terminal

In/Out

Function

50

VSS3

In

Ground (0 V) source

58

EA13

Out

Not used

60

EWEB

Out

Write enable signal output for the effect RAM

 

 

 

 

61

EA14

Out

Not used

 

 

 

 

62, 66, 70, 74, 78

VSS2

In

Ground source

 

 

 

 

63, 67, 71, 75, 79

VDD2

In

+5 V source

 

 

 

 

64, 65, 68, 69,

PA0 ~ PA7

Out

LED segment signal output

72, 73, 76, 77

 

 

 

 

 

 

 

DAC (IC102: UPD6379GR)

The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the melody, chord, bass, and percussion for the right and left channels. The DAC converts the data into analog waveforms and output them to each channel separately.

LOUT

R OUT

DAC

IC102

UPD6379GR

Data

SISO Word clock

LRCK WCKO Bit clock

CLK

DSP

LSI101

HG51B227FB

Synch signal

SINC SCK1

Data

SISO Word clock

WCKI

LRCK

Bit clock

 

 

 

 

BCKI

 

BCK

 

 

 

CPU

LSI105

UPD912GF-3BA

FILTER BLOCK

Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms.

To main volume

10V22

AVDD

2SC1740SQ

1K

470

C332(H)

C333(H)

 

 

AG

 

AG

AVDD

2SC1740SQ

1K 1K

1K

AG

22K

47K

AG

From the DAC

50V0.22

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Image 8
Casio CTK-630 specifications DAC IC102 UPD6379GR, Filter Block

CTK-630 specifications

The Casio CTK-630 is a portable keyboard designed for musicians of all skill levels, combining functionality, versatility, and user-friendly features. This model is recognized for its 61 piano-style keys, providing an authentic touch for players while ensuring portability. The keyboard is lightweight and easy to transport, making it an excellent choice for home practice or performances on the go.

One of the standout features of the CTK-630 is its extensive range of sounds and rhythms. With over 600 built-in tones, including instruments from around the world, players can explore a variety of musical styles, from classical piano to modern synth sounds. Additionally, the keyboard includes 180 accompaniment rhythms, allowing users to create rich musical backgrounds for their melodies, making practice and improvisation more dynamic.

The CTK-630 is also equipped with advanced technologies that enhance the playing experience. One such feature is the Digital Signal Processing (DSP), which adds effects like reverb and chorus to sounds, enriching the audio output. The keyboard's auto-accompaniment feature automatically provides harmonizing and chordal support based on the notes played, facilitating creative composition.

For musicians interested in learning, the CTK-630 offers built-in lessons that are ideal for beginners. These lessons help users develop their skills progressively, making it easier to learn new songs and techniques. Additionally, the keyboard is compatible with the Casio Chordana Play app, which provides interactive learning tools and song libraries for enhanced educational engagement.

The CTK-630 also includes a pitch bend wheel, allowing players to add expressive pitch variations to their performances. This feature is particularly useful for genres that emphasize playability and dynamics, such as jazz and pop. Furthermore, the keyboard's MIDI compatibility enables users to connect it to computers and use it with various music software, expanding its versatility for compositions and recordings.

In conclusion, the Casio CTK-630 is a versatile and feature-rich portable keyboard that caters to both novice and experienced musicians. Its combination of built-in tones and rhythms, user-friendly learning tools, and connectivity options make it an excellent choice for those looking to explore their musical creativity while enjoying the convenience of portability. Whether practicing at home or playing gigs, the CTK-630 stands out as an accessible and powerful instrument for all.