Casio SK 8A - Page 17

Pin No.
64
Terminal Name
ln / Out
Out
64 K012
Out
65~76
KOII-KOO
Out
77-84
KI1 ~ KI8
1 n
85
POO
Out
86-88 POI ~ P03 Out
89
Out
90 EG
Out
91 EF
Out
' 92
EE
Out
93
SH
Out
94
SG
Out
95 SF
Out
96 SE
Out
97
98 AGND
99 VDAC
100
Vin
In
Timing
Function
APO (Auto Power Off) signal output.
Terminal drops to LOW level to shut the voltages off when the unit is
not operated for approximately 00 minutes.
Key common and LED drive signals outputs.
Key input signals
Reset signal for Percussion generator.
The terminal holds LOW level at power ON for a while during which
the internal circuits of the Percussion generator are initialized.
LED common signals output.
Melody envelope signal output
Melody or obbligato envelope signal output
Melody or chord envelope signal output
Melody or bass envelope signal output
Melody pitch signal output
Melody or obbligato pitch signal
Melody or chord pitch signal
Melody or bass pitch signal
No function
+5V source for DAC (Digital to Analog Converter)
Ground (0V) source for DAC
Sampling sound input signal from MIC terminal
n n n n
h n n n
n n n n
n n n n
■ i
L_
4t
i - 1
1 1
i_i-
1 1 "
6t
i
Address
)( Address
\
7t_
t
i-r
n_r
Data (into RAM)
n
n
Write Cycle (+ pulse refresh)
Floating Cycle (+ pulse refresh)
i - 1/fPG («7,802MHz)
art of sampling CPU for ROM and RAM