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CRT/LCD
MODEl
MOOED
-';~L
,,' , ;
,."t,-.
L(LCD)
1-_.::L'--_t-_.:,H:.-_f,c:):·",i,,;:::;,L,,"-:'::.'
"1"'-"
'll ,.-U
1-
~~H~~~~L~-4~~M_~D]~,~7~
.. _
"
2Hv:.
;~:,
H
'\1'::;
H
L
*2
IfJ:-m~)
OBJ:
l11~d~,~ ~h,~-,~.m ~9,t-pf:Jh,~,Ptt~~~C!e~Jqntj§;g~nerated
by decoding the CC5-CC7 and RDO. The decoding circuit is
shown in Figure 7-3.
iO'ViDES
I
:_,n~
,-
I',
i
,.i
i',
RD7
RDO-7
nG~.i_-rJ
-,
Q , ; ' _ ' )
,]
:::1 ,-
Figure 7-3. The decoding circu,itin
the
MN
1
t292 - "
.
~j
.-
_"J,J 1:".1]
' J
t,-~'
' :
,~a' ~:T~~ .~,~tJJ~!i~t,,!;r~'\di:~~J_c\lY~~-,Wh~i(r~t~t'~-~qd1e's{
i;
-hJ~\ bQ~:,
in
,,- 'I:L1i1
""'CRT--'
d' "~arid-hex-07H-irl·the teD' iTiode~~'"
'_''',1, I"
'J,
h.;;,!iJle:)\: "1
~3mo ,~,-
,./,,'.'i
'J:;J
,'Ij'"');:J
':~'J~~':"
,,",3'1):.:,;
~:
\ ..
,1
,~,i;
.:}].
,'-',~t
;)'-..
~~:-_:
"Jill
r'I~,:r~j
_:i'~h
~,,::'i
,\.J-\;-!'J
:I!j
"
;7",4.,Vidt;!QJ'I~MJac,I;~$$;QUh~t~CP!J ');~:
.d.J
,)"i)
-,;',-:1;';,;
-)i~T~!9) ~,:NlNJ ?~g; F.a(':G.e§s~s,j th~
\; yipJ!Jili.
R,AM'
_0
I..!$.ing ',t!;V;L gy,c;;I.e
:),~teal
"
1J~.ch,niqu~; }h/Jle!J:Jt1~ Cp,_lLaG~_f!E!§g~ !.tJJ?;vl~teg 8A~,,:l'Jq· tlik~r~.3"IilJ
:'
,app,e,~f'J.n .t.t:l~
.qi$pl13.Y
im.?ges,Qf.~i~~t;!:rth~.cR]':,
o.r
t~91 LQO:!\10,d.~~;,
:;
J'
Th~lyi(;te..o:
-' 1 :AM
'I?-_cpe~s tim.lng~,~~r§"st:u:)wni-i,1J ),F,ig~re 7;~9.'"'i7-1;~.;
:) j,1
';-1
7-3.
Reset Sequeric'i!","l ';
.')i,C',,',
'h',;
,', "
The MN1292 starts to
qgerate
when{tt''e,resetl.
i§'f~actiVei. :;~"i
,
'~,;,'~hEP_Mt-J}29~;synclltontZ~s: witff t~irMN12881 (LCD{CRT-1Gontr9Ifer)
'j:ana
titsthe,video-RAM accesstimirig,Jmemory address outpultiiTifng,
:~)_ ,a~(j!.?~~~ i.~P~,!; ~irry.i~g
.. -: ·
J
~
>f,
','1,:<'
',~j',;r;I,~;-l~
.) .'.:" :: ':;
~:~~
:,
l'J;~';.' ~,'
--"
j", ,:)~:, ~.
":I1N~en
the operatton
,st~rts,
the ,t.(IN12920utplrt§EGDGlK,fo,:the
. ,. MN1288
andi~eGHAC[K
(which is a'diVidedoy
8'siQi1atoflCDC~K)
--. . 'is --then:f~d: bac~ :td·tt1~ M~-1.292:
'l'he,'vloe'o-RAM
,_aCeS_55 l sigH~rs
"are
,)"generated. fro'm·Me firsffaUing ~edge'''of·G.fiAGLI<_;--:(Timing dfawa~s
. are s,hown in
Figure}:.1:~.:":?':'14JJ--):~'
';.,J
~ ,~,:?
'\ -1:'i "
~,-;~-',);
,1,_:;
,; Wh,iri:the,displaymode'(CR'l"
cir
lCDrisi:hi"iged:\yhil,et~e'Ml'Jl~92
is operating, the MN1292 will reset itself _and synchroniie{witlHhe
M"J1.~8'8-:(jsl~g'the
Cf-!ACIlK.
:-),:,')
;;~:-:)
:'_',hii:J'
'j,;'
,!,
,'~
~)i
J::J, ;
ri, : "
',~' 1;:
,', "_~\)i:-:'~
,:'I.;I~J
i'l 'iU ,.;. ,-;
l_:
:-;-:;)
"
',.,'kJi!
1,,-1,
'.1_1.;
7-4.
Display Size
aiiifo~1!7atirigFreqlie~c:ybfthe
B
. MN1288
.
'::;~'2j:'_L:; _,_-.~ _..:_.::~J
.cD8
::F;D'!:')::)~). ,J·2:~
:jjJ).,J .
j ..
.c
7·4·1. CRT Mode
.2"Ffie'-720x·8ScI "dOis-mbriocfiromelCHf\barrbEfeoiin~cte&l~1 tnefCRT
\1mbde,2L-:l
~;:JT":I~)
')1:,
!
:>~-~-':;::;:"J:; ::;~.) ':-'2~;JUD~i
U"J ,,,2';),:1
(;-,:-h\'
The operating frequency of the MN1288 is calculated
below.-l'3·-hI~
,?:h;ijll
if)
;-;-;f)i'i
,Ji·):jr;'l:l
n)':i')
-)'1
,~!fi
r
"d_~;C~)l
'linn
1;!
;·,'i
;11]-'-:; ,. c;:
,,,.<l"
The MNt292 outputs 9 bits data to the VIDEO pirt.9u'ingHhe;1
character clock period.
The values to set to,th_e_MN128Rregisle[s_are_shownJrr Figure
7·4.
!
~:'_':~2;~::'~
: ::;':':'::
!
Register No.
RO
RI
R2
.HSYN
PositI9n
_.JLj
R3
HSy!,!g/V~YN.Q_Wl!!th
R4
Vertical Total
19
R6
Vertical Displayed
19
Rl2
Start Address
<
H >
00
R14
Cursor Address<H>
00
R16
light
Pen<H>
R17
Ligh~ P~I]~~>
,,),),11);
-"-'1"
Figure
7-~f
ilie
-~~Tu~~~~~et ~'!h~- M~_1_~8~:~_~
_ .
;.!'J ",
~j
'-
.
-J'II\'
The display size ca;ICLilareCf
BY
thevalae~_9J1Fiaw'~
7-:4
i~ ~hown
in
Figure 7-5.
i----~ 'I:'~--'~
':;:;,
L-'~~':'~-~;:;'i
-
---j
98 Charac ters (882 Do ts)
80 Characters (720Dots)
kj
."
I
'c,'
:I·jf.~ -~I~4;-Ras.te_~_sn;;
---
9 Dots
.,
Figure 7-5. Displi}Y size i'1 CR:r
ll1ode,~
18:43KHz '
Vertica!iFtequency
=
49.8Hz
'Jh':l
j;,-,;
370 ______
J
J"""'"
." .. '---.
. . . . .
,j
.
The underlihi;(is'displayed when the _raster _address is hex OCH.
The underline
is
overlapped by cursor iNtre" the Values
J
in Figure
7-4.
are set to the MN1288 registers.
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