CTK-220L
100 TONES
25 RHYTHMS
20 SONG BANK
POWER/MODE
VOLUME SYNCHRO/ START/
TEMPO
¢
SONG
BANK
¢
0
5
1
6
2
7
3
8
4
9
TONE
FILL-IN
STOP
STEP
1
STEP
2
STEP
3
DEMO
MULTI FUNCTION DISPLAY
20 SONG BANK KEYBOARD
FINGERED
CASIO CHORD
NORMAL
ON
OFF
¢
¢
RHYTHM PART
SELECT
TONE RHYTHM SONG BANK
TRANSPOSE/TUNE
CTK-220L
ELECTRONIC KEYBOARD
SPECIFICATIONS
GENERAL
Number of keys:
Polyphonic:
49
12-note
100
Preset tones:
Transpose:
F# ~ C ~ F: half-note
Auto-rhythms:
Accompaniment:
Song bank:
25, Tempo: Adjustable, 216 steps (40 ~ 255), initial value: 120
CASIO Chord, Fingered, Fill-in pattern, Synchro start
20-tune
Digital volume control:
Tuning control:
Built-in speakers:
Terminals:
10 steps (0 ~ 9), initial value: 7
440 Hz ± 50 cents
10 cm dia. × 1 (Output: 2 W)
Headphone Jack, Stereo mini Jack [Output impedance: 70 ⏲, Output voltage:
3.6 V (rms) MAX]
Auto power off:
Power source:
Approximately 6 minutes after the last operation
2-way AC or DC source
AC: Required optional AD-5 AC adaptor
DC: 6 AA size batteries
Power consumption:
Dimensions (HWD):
Weight:
7.7 W
85 × 771 × 324 mm (3-3/8 × 30-3/8 × 12-3/4 inches)
3.4 kg (7.5 lbs) excluding batteries
ELECTRICAL
Current drain with 9 V DC:
No sound output
160 mA ± 20 %
840 mA ± 20 %
Maximum volume
with white keys C1 to G2 pressed in Synth-Lead 1
Volume: Maximum
Phone output level (Vrms with 8 ohm load):
with key C2 pressed in Synth-Lead 1
98 mV ± 20 %
Speaker output level (Vrms with 4 ohm load):
with key F4 pressed in Synth-Lead 1
2000 mV ± 20 %
Minimum operating voltage:
6.3 V
— 1 —
BLOCK DIAGRAM
7 seg. LED
LED Latch
IC2, IC3
MD0 ~ MD7
Phone/Output
KO8 ~ KO11
Buttons
Amp.
IC301
LA4598
Filter
Q305
CPU
KI0 ~ KI7
LSI1
KO0 ~ KO7
MSM 6755B-13
Illuminant
Keyboard
LX0 ~
LED Driver
Power Supply Circuit
Q301 ~ Q304
APO
LX7
DC+9 V IN
Q5 ~ Q8
D334, D336
LY1 ~
LY7
LED Driver
Q1 ~ Q4
Reset IC
IC1
PG
X1, Q11
CIRCUIT DESCRIPTION
KEY MATRIX
KI0
KI1
C2
KI2
G#2
A2
KI3
E3
KI4
C4
KI5
G#4
A4
KI6
E5
KI7
KO0
KO1
KO2
KO3
KO4
KO5
KO6
KO7
C6
C#2
D2
F3
C#4
D4
F5
A#2
B2
F#3
G3
A#4
B4
F#5
G5
D#2
E2
D#4
E4
C3
G#3
A3
C5
G#5
A5
F2
C#3
D3
F4
C#5
D5
F#2
G2
A#3
B3
F#4
G4
A#5
B5
D#3
D#5
Start/
Stop
Volume
Down
KO8
KO9
K10
K11
0
5
1
2
7
3
8
4
9
Up
Volume
Down
Synchro/
Fill-In
6
Down
Song
Bank
Part
Select
Tone
Step-1
Rhythm
Step-2
One Key One Key
Demo
Off
Casio
Fingered
Step-3
Normal
Chord
LED MATRIX
LX0
LX1
D3
E3
F3
LX2
C3
B2
A2
G2
D5
E5
F5
LX3
C2
D2
E2
F2
LX4
G#2
A#2
D#4
C#5
D#5
C6
LX5
F#2
C#3
C#4
A#4
F#5
LX6
D#2
D#3
A#3
G#4
G#5
LX7
C#2
F#3
G#3
F#4
A#5
LY1
LY2
LY3
LY4
LY5
LY6
LY7
D4
C4
B3
A3
E4
F4
G4
G3
C5
B4
A4
B5
A5
G5
NOMENCLATURE OF KEYS
C#2 D#2
F#2 G#2 A#2
C#3 D#3
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
C2 D2 E2
F2
G2 A2 B2
C3 D3 E3 F3
G3
A3 B3 C4
D4 E4 F4 G4
A4
B4 C5 D5
E5 F5 G5 A5
B5
C6
— 3 —
CPU (LSI1: MSM6755B-13)
The CPU contains a sound data ROM and a DAC (Digital to Analog Convertor), and it provides a sound
waveform in accordance with the pressed key and the selected tone. The CPU also controls key input, button
input and LED driving. The following table shows the pin functions of LSI1.
Pin No.
1
Terminal
MA14
In/Out
—
Function
Not used.
2
MWEB
Out
—
Clock for LED latches
3 ~ 5
6
—
Not used.
MA0
Out
—
7-seg. LED drive signal
Not used.
7 ~ 19
20 ~ 27
28, 29
30
MA1 ~ MA11
MD0 ~ MD7
NC1, NC2
DGND
Out
—
7-seg. LED drive signal
Not used.
In
Ground (0 V) source
31
DVCC
In
+5 V source
32, 33
34
XTLO, XTLI
NC3
In/Out
—
20 MHz clock input/output
Not used.
35
RSTB
In
Reset signal input
36
P24/RXD
P25/TXD
NMI
—
Not used. Connected to +5 V.
Not used.
37
—
38
In
Power ON signal input. Connected to +5 V.
APO (Auto Power Off) signal output
Not used.
39
APO
Out
—
40
NC4
41
REFH
Out
—
Terminal for the internal DAC
Not used.
42, 43
44
NC5, NC6
DAOR
Out
—
Right channel sound waveform output
Not used.
45
NC7
46
AVdac
In
+5 V source for the internal DAC and ADC
Left channel sound waveform output
Terminal for the internal DAC and ADC
Ground source for the internal DAC
Ground source for the internal ADC
Not used. Connected to ground.
+5 V source for the internal ADC
Not used.
47
DAOL
Out
Out
In
48
REFL
49
AGdac
50
AGadc
In
51
ANI
—
52
AVadc
In
53
NC8
—
54
MOD0
In
Mode selection terminal. Connected to +5 V.
Mode selection terminal. Connected to ground.
APO cancellation signal
Terminals for key/button input signal
Terminals for key scan signal
Terminals for button input signal
Not used.
55, 56
57
MOD1, MOD2
P40
In
In
58 ~ 65
66 ~ 73
74 ~ 77
78
KI0/P30 ~ KI7/P37
KO0/P50 ~ KO7/P57
KO8/P20 ~ KO11/P23
NC9
In
Out
Out
—
79
LVCC
In
+5 V source
80 ~ 95
96
LX0 ~ LX7, LY0 ~ LY7
LGND
Out
In
LED drive signal
Ground source
97 ~ 100
MA18 ~ MA15
—
Not used.
— 4 —
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