Casio CTK-530 Manual De Usuario

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CPU

LSI101

UPD912GF-3BA

Sound Source ROM

LSI102

MX23C8100PC-12CA19

CE

A0 ~ A18

D0 ~ D15

MA1 ~
MA19

MD0 ~
MD15

MSB0

FI0 ~ FI7
  SI0 ~ SI7

SO

BOK

LRCK

PG

X101

20 MHz

DAC
IC103

UPD6379GR

LOUT

ROUT

SO: Sound data
BOK: Bit clock
LRCK: Word clock

SI

CLK

LRCK

From keyboard

Reset IC

IC104

RE5VA35AA

Power Supply Circuit

VDD

Battery set

RESET

VDD

POWER

From power switch

NMI

APO

CPU

LSI101

UPD912GF-3BA

SCKO

When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The CPU
then initializes its internal circuit.
When the power switch is pressed, the CPU receives a low pulse of POWER signal.The CPU raises APO signal
to +5 V to turn power on.

The 16-bit CPU contains a 1k-byte RAM, three 8-bit I/O ports, two timers, a keycontroller and serial interfaces.
The CPU detects key velocity by counting the time between first-key input signal FI and second-key SI from
the keyboard. The CPU reads sound data and velocity data from the sound source ROM in accordance with
the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then the
CPU provides 16-bit serial sound data to the DAC.The CPU also controls MIDI input/output and LED driving.

F#3 G#3 A#3

C#4 D#4

F#4 G#4 A#4

C#5 D#5

F#5 G#5 A#5

F3

G3

A3

B3

C4

D4

E4

F4

G4

A4

B4

C5

D5

E5

F5

G5

A5

B5

C6

D#3

C2

D2

E2

F2

G2

A2

B2

C3

D3

E3

B6

A6

G6

F6

E6

D6

C7

C#3

A#2

G#2

F#2

D#2

C#2

A#6

G#6

F#6

D#6

C#6