Sharp PC-1500 Technical Reference Manual page 75
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- Applications manual (222 pages) ,
- Technical reference manual (182 pages) ,
- Instruction manual (169 pages)
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3-3. Internal structure
70
3-3-1. Block diagram
T he
I/
0 pon controller
consists
of
nine
i
mcrnal
registers.
wait
com roller.
seria
l
controller.
a
nd interrupt
controller.
and each
of
int<;:rnal
registers
can
be
accessed
as
one loca1
i<.>n
of
the
111crnory
as seen
fron1
the C f)U
.
1/0
port controller system block
diagram
.,.,
C1·
"
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11
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,
3-3-2.
·
Internal registers
(j)
G
register
(
RS3-
0
=
1001)
i;1
'
(1;
'
~
(.4
G3 G2
(ll
(t)
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Clock
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t.St
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l
I
0
LSt
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I
CPU
Op(•1 1l~1nl}
.
LSt
3.51
l•flq1
~ncy
l
I
I
·111e
(i
register
can
read/
write data when l'cgis1er
is
selected
(1
001).
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