Sharp MZ-3500 Personal Computer User Manual


 
M
2
3500
8.
OTHER INTERFACES
8-1.
Clock
circuit
1)
Schematic
T;
10 Ii2 u "
HDH
*
l«"-.r
1
2)
Clock
timing
READ
HOLD
.
READ
mode
mode
[
mode
Cn(CO~C2)
0 X 3 Y~l
STB
/ \ /
^Ones digit
of
seconds
Tens
digit
of
seconds
WRITE
HOLD
mode mode
Tens
digit
of
month
'
SET
i
HOLD
mode
I
mode
DIN
Don't
care
X
CLK
DOUT
Tens
digit
of
seconds
Tens
digit
of
month*
-
8)
-