EasyManua.ls Logo

Sharp CE-150 - Page 312

Sharp CE-150
412 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
72
A
ll
and more about Sharp PC-1500
at
http://
www
.PC-1500.info
CD
DOB r
eg
ist
er
The
register used
IO
determine
the
direction
of
the port PB.
Selection
of
the
inpm
/outplll
port
is the
sa
me as in the
DDA
resister.
DDB
can
r
ead
/ write
data
when the register is selected ( I
10
1).
© OPA r
eg
ister
OPA
7 6 5 • 3
~
0
,_,__LI_! I I
The
OPA
register
is
the buffer for input
and
outpu
t
of
di
1rn
to the port
PA
.
Jn
the case
of
output.
DD
Ai
mu
st
be
set to
..
I"
(o
ut
put
mode)
and
the regist
er
must be
sele
cted
(
111
0)
,
then
th
e
data
on
th
e
bus
line is lo
aded
intoOPr'\i,
Hl
be
output
on
P/1i.
Jn
t
he
case
of
input.
DD
Ai must be set
to
"O"(input mode) which prohibits
outpu
t from
OPAi.
then the contents of
PAi
arc
loaded into
OPA
i
and
the
data
is sent
on
th
e bus
line.
<D
OPB register
Th
e
OPB
register is the buffer
fo
r input
and
o utput
of
da
ta
to the port PB.
It has the
same
fu
nction
as
the O
PA
1·egister.
OPB
can
re
ad
/ write
data
when
the
regist
er
is selected (I I I I).
© OPC register
Th
e
OP
C register
can
read/write
data
when the regis
ter
is
selected (
IOOO).
Al
so
.
the
contents
of
the
data
bus
can
be latched
to
the
OPC
regi~tcr
at
the falli
ng
edge
of
the external input clock
P4>.
@ F
reg
ister
Th
e F register
can
read/ write
data
when the regi
st
er
is selected
(OJ
I I).
F0
-2
de
t
erm
i
ne
s the clock rate
of
the
modulation clock FX
and
F3-5 the
modulation
clock
of
FY
.
x
_L
F6J
ro
J
F4
_1
F3J
F2
J n J
Fo
_I
I
Determines the modula
ti
on clock tate
of
FX,
Determines the
modu
lation cl
ock
rate
of
FY.
I
Clock ra
te
0 0 0
1'
+64
0 0
1
4>+
128
Change of
SOO
outpu
t moae
~
'
t
0
,p
+256
0
Notma
l serial data transfer
0 1 1
,p
+5
12
I
f\
1odul
ate
d serial
data
transfer
1 0 0
ol
+ 1
024
Do
not sale this
PDF!!!

Related product manuals