Korg EX-8000 - Page 35

CPU 63B03X
PIN CONFIGURATION
BLOCK DIAGRAM
MP.E
p»Gi
63B03X
iDwR
13 o,
EQd«
jEDd7
Oa,
3 a,
SI a!
As
E3a.
33 A,,
El a,,
5) Panel switch scanning
In similar fashion to keyboard scanning, 2-bit addresses
in the range A0~A1 are decoded by the address decoder
LS1139 (IC18) and supplied to the switch matrix. The
output goes to octal buffer HC240 (IC16) (the same as
used by the keyboard) and is passed to the data bus.
6) LED Display
The LED display is software controlled. Latch HC374
(IC22, IC24) takes LCD display data from the D0-D7
8-bit data bus to operate LED drivers 54513 and 54562.
7) Digital delay
The KLM-775 board has its own dedicated delay gate
array, /xPD65010CW-113. The delay circuit comprises this
gate array, 64KB dynamic BAM x 2, ADC, DAC, and
analog compander. The delay time can be specified.
CPU
Port
P20
P21
P22
P27
RX
TX
P25
P26
P52
P53
P57
P60
P61
P62
P63
P64
P65
P66
P67
63B03X STATE OF PORT
Pin
9
10
11
16
12
13
14
15
19
20
24
25
26
27
28
29
30
31
32
function
Velocity Sens. Control 3 Bit
Velocity Sens. Control 2 Bit
Velocity Sens. Control 1 Bit
Velocity Sens. Control 0 Bit
MIDI RX
MIDI TX
TAPE OUT
TAPE OUT
A/D Compare
+5
TAPE IN
DWGSFREQ.DATA D15
DWGS FREQ. DATA D14
DWGS FREQ. DATA D13
DWGS FREQ. DATA D12
DWGS FREQ. DATA D11
DWGS FREQ. DATA D10
DWGS FREQ. DATA D 9
DWGS FREQ. DATA D 8
Scan by Manual Manor
http://www.markglinsky.com/ManualManor.html