Casio SK-1 - 3 CH Multi Memory and Chord System

ROM St RAM
Accesses
RAM
(1)
and RAM (2) are
dynamic 64Kbit RAM. Since
they are dynamic type, data should
be
refreshed every 2msec. at
least. The
memory
is
used as
the demonstration, memory play, and
sampling data area.
The chip select condition
and memory assignments are
as
shown below.
Chip^\
I
1
A15
'
1
CE
1
OE
1
Memory Assignment
RAM
(1)
1 1
1
H
,
1
1
1
(LSB)
L
22.528 bit (MSB)
L
1
u
1
Demonstration/Memory play
1
Sampling
1
RAM {2)
1
1
1
1
1
1 1
{LSB) 65,536 bit (MSB)
Sampling
RAM
(1)
cannot record
demonstration data and memory play data at the same time.