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DAC (UPD6376CX)
UPD6376CX is a two-channel 16-bit Digital to Analog Convertor consisting of resistor string, output
amplifier and zero offset circuit.
Key Touch LSI (HG52E35P)
By counting the time between first-key input signal FI and second-key SI from the keyboard unit, the key
touch LSI detects key velocity of 256-step. Then the LSI sends the CPU the note number and its velocity
data.
CRDB
CWRB
CKI
CCSB
RESB
CD0
CD7
CA0 ~ CA2
First contact
Second contact
KC0
KC7
FI0
FI7
SI0
SI7
Key input signal
Key scan signal
~
Data bus
Address bus
Key touch LSI
LSI106
HG52E35P
Keyboard
FI
SI
KC
RD
WR
APO
A12
A14
CLOCK
RESET
Pin No.
Terminal
In/Out
Function
1
SEL
In
Mode selection terminal. Connected to ground.
2
D.GND
In
Ground (0 V) source for internal digital circuit
3
NC
Not used
4
DVDD
In
+5 V source for internal digital circuit
5
A.GND
In
Ground (0 V) source for internal analog circuit
6
R.OUT
Out
Right channel sound waveform output
7
A.VDD
In
+5 V source for internal analog circuit
8
A.VDD
In
+5 V source for internal analog circuit
9
R.REF
In
Reference voltage terminal. Connected to a capacitor.
10
L.REF
In
Reference voltage terminal. Connected to a capacitor.
11
L.OUT
Out
Left channel sound waveform output
12
A.GND
In
Ground (0 V) source for internal analog circuit
13
LRCK
In
Word clock (L/R separation signal) input.
14
LRSEL
In
Not used. Connected to ground.
15
SI
In
Sound data input
16
CLK
In
Bit clock input
Summary of Contents for Oriental Maestro AT1
Page 1: ...ELECTRIONIC KEYBOARD AT 1 without price...
Page 17: ...15 SCHEMATIC DIAGRAMS PCB JCM719 MA1M 8 9 10 11 2 21 12 13 14 15 20 1 4 3 5 6 7 22 23...
Page 18: ...16 PCBs JCM719 CN1M CN2M MA2M 19 16 17 18...
Page 19: ...17 PCBs JCM617T KY1M KY2M...
Page 28: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926 May 1995...
