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Casio CTK-750 Manual De Usuario

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Digital Signal Processor (HG51A115A01FD)
Upon receipt of note numbers and their velocities, the DSP reads sound and velocity data from the sound
source ROM in accordance with the selected tone; the DSP can read rhythm data simultaneously when a
rythm pattern is selected. Then it provides 16-bit serial signals containing data of the melody, chord, bass,
and percussion to the DAC. The DSP also adds the selected effect to the sound data using a 256k-bit
RAM.
The following table shows the pin functions of the DSP.
Pin No.
Terminal
In/Out
Function
1 ~ 8
CD0 ~ CD7
In/Out
   Data bus
9, 10
   Not used.
11
GND7
In
   Ground (0V) source
12
CK16
Out
   16.384MHz clock output  
13
VCC6
In
   +5V source  
14
CK0
In
   Clock input. Connected to terminal CK16.
15
TCKB
   Not used.
16
VCC1
In
   +5V source
17
GND1
In
   Ground (0V) source
18, 19
XT0, XT1
In/Out
   16.384MHz clock input/output. Connected to a crystal oscillator.
20
SGL
In
   System control terminal. Single chip system: Open
21
CCSB
In
   Chip select signal input
22 ~ 25
CA0 ~ CA3
In
   Addess bus
26
CE0
In
   Not used. Connected to ground.
27
CWRB
In
   Write enable signal
28
CRDB
In
   Read enable signal
29 ~ 32
   Not used.
33
RESB
In
   Reset signal input
34
TESB
In
   Not used. Connected to +5V. 
35 ~ 39
   Not used.
40 ~ 49
52 ~ 57
RD0 ~ RD15
In
   Data bus for the sound source ROM
58
RA23
Out
   Not used.
59
RA22
Out
   Chip select signal for the sound source ROM
60, 61
RA20, RA21
Out
   Not used.
62 ~ 73
75 ~ 82
RA0 ~ RA19
Out
   Data bus for the sound source ROM
74
GND5
In
   Ground (0V) source
83
WOK2
Out
   Word clock output. Not used.
84
VCC3
In
   +5V source
85
GND3
In
   Ground (0V) source
86
WOK1
Out
   Word clock for the DAC
87
SOLM
Out
   Serial data output. Not used.
88
SOLP
Out
   Serial data output for the DAC
89
BOK
Out
   Bit clock output for the DAC
90 ~ 92
   Not used.