Casio SK 8A User Manual

A15
CPU
MSM6283-05GS
WE VCC
cs 3
AO | S
* £ S
A14 5
1/01 £
> > a.
Address bus AO ~ A14
VCC
OE
o
_
<
CE
LU
CD
AO
2
*3-
CN
Z
O
O
A14
cc
OO
CM
OO
O
D_
z
3.
07
- g c\ i\
RESET £ O
u) * 3 -
CE1
D0-D7 POO
Data bus IOO ~ 107
Data bus DO ~ D7
pPD43256C-12L is a 256Kbit RAM for storing sampling sounds and ROM pack data. The data in
RAM are kept even power switch OFF as long as DC7.5V is provided.
pPD23C256EAC is a 256Kbit ROM and contains preset tone, percussion data, and system execution
program.
MSM6294-02 is a percussion generator and issues percussion sounds in accordance with the data from
CPU.
The chip select condition is as follows.
H: High level
L: Low level
X: Irrelevant
Ship selection
A15
CE
CE1
RAM
L L
X
ROM H
L
X
Percussion generator
X X L

Casio SK 8A Specifications

General

Brand	Casio
Model	SK 8A
Category	Electronic Keyboard
Language	English