Filter Block

The following table shows the pin functions of LSI16.

Pin No.	Terminal	In/Out	Function
1	REQB	Out	Not used.
2, 3, 60 ~ 63	FI8 ~ FI10,	In	Not used. Connected to +5 V.
2, 3, 60 ~ 63	SI8 ~ SI10	In	Not used. Connected to +5 V.
	SI8 ~ SI10
4	VCC	In	+5 V source
5	CRDB	In	Read enable signal input
6	CWRB	In	Write enable signal input
7	CCSB	In	Chip select signal input
8, 9, 11	T, STBY, W	In	Not used. Connected to +5 V.
10	RESB	In	Reset signal input
12	CKI	In	10 MHz clock input
13, 14	TMD, TST	In	Not used. Connected to ground.
15	CKO	Out	Not used.
16	GND	In	Ground (0 V) source
17	XIN	In	Not used. Connected to ground.
18	XOUT	Out	Not used.
19	TRES	In	Not used. Connected to ground.
20 ~ 23, 25 ~ 28	CD0 ~ CD7	In/Out	Data bus
24	GND	In	Ground (0 V) source
29 ~ 31	CA0 ~ CA2	In	Address bus
32	VCC	In	+5 V source
33 ~ 39, 41 ~ 43,	FI0 ~ FI9,	In	Key input signal input
53 ~ 55, 57 ~ 63	SI0 ~ SI9	In	Key input signal input
53 ~ 55, 57 ~ 63	SI0 ~ SI9
40	VCC	In	+5 V source
44 ~ 47, 49 ~ 52	KC0 ~ KC7	Out	Key scan signal
48, 56	GND	In	Ground (0 V) source
64	VCC	In	+5 V source

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

16 V 10 µ			-

To main volume

IC203

M5218APR

C333(H)

1 K

C471B

	AVDD	AVDD
Q210/211		10 K
2SC1740
1 K	1 K
C103(H)	1 K
AG	AG

50 V 0.47 µ

From the DAC

— 11 —

WK-1500 specifications

The Casio WK-1500 is a versatile and user-friendly keyboard designed for aspiring musicians and experienced players alike. Part of Casio’s renowned line of portable keyboards, the WK-1500 combines advanced features with a compact design, making it a suitable choice for both home practice and live performances.

At the heart of the WK-1500 is its impressive sound engine, which boasts an extensive library of sounds. With over 600 built-in tones, including a variety of acoustic and electronic instruments, players can easily find the perfect voice for any musical genre. The keyboard also features over 180 rhythms, allowing users to explore a broader musical landscape and enhance their compositions with supportive accompaniments.

One of the standout features of the WK-1500 is its 76 full-size touch-sensitive keys. This is particularly beneficial for pianists, as the touch sensitivity provides a more responsive playing experience. Players can express dynamics and nuances in their performances, enriching their musical interpretations.

The WK-1500 is also equipped with a powerful performance tool known as the "Advanced Synthesizer." This technology allows users to create and modify sounds in real-time, providing endless creative possibilities. Additionally, the keyboard includes a built-in arpeggiator that offers various patterns and styles, further expanding the creative potential.

For those who enjoy composing and recording, the WK-1500 offers built-in song storage with the ability to save and play back original compositions. Users can also connect the keyboard to a computer via USB, making it easy to transfer MIDI data or use the keyboard in conjunction with digital audio workstations.

Another notable characteristic of the WK-1500 is its durability and portability. Weighing in at just under 10 pounds, it is lightweight enough to transport easily. The keyboard also comes with a robust stand and a power adapter, ensuring that musicians can play wherever they go.

In conclusion, the Casio WK-1500 is a feature-packed keyboard that caters to the needs of a wide range of musicians. With its extensive sound library, touch-sensitive keys, advanced synthesizer capabilities, and portability, the WK-1500 stands out as an excellent choice for both learning and performing, ensuring it remains a popular option in the world of portable keyboards. This combination of features, technology, and user-friendly design makes it a valuable instrument for music enthusiasts of all levels.

Pin No.

CRDB

CWRB

CCSB

RESB

FILTER BLOCK

WK-1500 specifications