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All and
more about
Sharp
PC-1500
at
http:f/www.PC-1500.info
3-1. Outline
The
LH5810
1.115811
i,
a
,ingk chip
CMOS
Static
LSI
that
features
the
follo\\iop.
f unctions:
(I)
two
p<airs
of
8-bit
bid irectional pnn
(2)
one 1>air of
8-hit 0111pu1
pon
(3)
t\VO
in1crrup1
rcqucsc inpuls (one
c:>f
lhcn1
pore
in pu
t)
(4)
one
interrupt request output
(5)
CP
U
wait
control
(6)
serial
data
tmnsfcr
t.•orurol
3-2. Functions
66
© Pons
PAll"-7
and
1'!30-7
can be progr.1m111cd
ofthcir
data
fl'"'
direction
in
bit unil.
Abo.
it can be accc,.. ...
~1
as
one location
ol
the memory.
as
seen
from
the
CPU.
0
Latch
clock
1'4>
can
be
direct!) gi"'"
from
the
c.-icrnal source
through output
pons
PC0- 7.
Al<o.
it
ca
n
he
access..'(]'"
one
location
of
the
memory.
as
seen
from
the
C
P U.
0
As
there are
two
interrupt
request
input>
or
I
RQ
and
rn7
.
interrupt
'"
'
Ille<!
can
be
issued
10
the
C
l'
U
at
the rising edge
of the
input when
the
con'Cspo11di11g
hit
< •f the
tvf
SK
rcgi:-.1
cr is
"
I"
.
(>07
rnust
bL'
in
(he
in
pu
I
n1ndc
befor.:-
using
P
B7
for
I
he
i
ntl!rru
pt
input.
©
Since
1
hl!rc
i~
thi..•
C PU
''
ait control
ci rcuit.
l\\'O
1
nen1 ory('nablr.:
signals can
be
output
to
thi,;
mcn1or~
of
'llO\\
:tCCt.'S..<i
rin1e.
Bc~ilh
..
,.
it
h.
a ~
l\\O inputs of
\\llit
condition'.
Up
to
8
\arii:lil~
of
a(.·cc:s~
tin1 ..
~
(".<tll be
progran1nlc:d.
0)
It
ha< the
follO\\ing functions
10
handk ..crial
da1a
1r:111'fer.
A.
Serial
data transmit
Serini
da1c1
ll'a
rt ..
fc:r
t;1kc::-.
place
i1:.
a
fornlH
l
ol a
:i.Hlrt
bi
t.
8
bits
or
<lat:1 .a11d
I
\\'()
:-.lop
hi1 s. ·rransrnission
clt>ck
is
sc:lcct<:
l
blc
hy
n1l'a11s
of
internal
a
nd
cx1cruu
I
clock
selt:c1
progr«1111. :l>\\cll
asthecloek
ratd
l
I.
I
2.
1 128. I
256.
I
5 12.
1
1024.
1
2048.
and
I
41)<)6
or
the
basic
clock).
B.
Serial
data
receive
\\.hen
the
,.t;tn
hit
i~
n.-cci\l-d
i11
an idle
,.,ah:.
thr.:
~rial
data
follo,,inc
l<>
it i!-
recci\l'tl.
1
\ftcr
rccei\'
·
ing
the: data
co111pri"''tl
ofX
hit.;. it
i'
then stored
in
tlx:
internal
rcgi,.tcr
und
tile intc-rn1pt
re<JUC"St
flag
i:-.
:-.ct
acti\c.
l~t...tti\e
clock
i,.
furni,hcd
fro1n
lhc
cx1
crna1 )0\lrcc ''hich
beco1ne~
the receiving
clock
by il!->l'lf.
It
11n 1,
l
be
in
~ynchroni7::t tion
\\'ith
thl~
serial
data
input.
C.
Pulse waveform
It
is pos:iiblc It>
ha,·c
continuoul'I
outpul of'
pulse
\\'aYcf<1r1n.
r:rcqucncy
is
program
mable 10 eight
kincb
of
I
I
.
I
2.
I
1
2~.
I
256.
I
512.
I
1024.
I
204fi.nnd
I
4096
of
the
basic clock.
Do
not sale
this
PDF !!!
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