Other Interface - Sharp MZ-350C Service Manual

M Z 3500
8. OTHER INTERFACES
8-1. Clock Circuit
1) Schematic
j; 10 M2 i i | U
fi?„
h
l I
l<h
~~
Vcc
* J . 3 2 K H ,
< r
i l l
T E S T f
,
N
I I I I M.f.-*
2) Clock timing
READ HOLD . READ ,
SH1FTmode y
mode mode j mode | " //
Cn(CO~C2) 0 X
HOLD
(Tsode
WRITE HOLD
mode mode
Tens digit of seconds
SHIFT mode
Tens digit of month '
SHIFT mode
Cn(CO~C2) 0
STB
^Ones digit of seconds
DI N Don'tcare X A> X t
CLK \ i
I)OUT
J_
Tens digit of seconds
SET i HOLD
mode mode
Don't care
XZHZXZ1
Tens digit of month''
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