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PDF LM20A21 Data sheet ( Hoja de datos )
| Número de pieza | LM20A21 | |
| Descripción | Dot Matrix LCD Unit | |
| Fabricantes | Sharp Electrionic Components | |
| Logotipo |  |
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PREPARED BY:
DATE
APPROVED BY:
DATE
,
SHARP
ELE~ONIC COMPONENTS CROUP
SHARP CORPORA~ON
SPECIFICATION
SPEC No.
F I L E NO.
LC63709
ISSUE
Jul. 11,1988
PAGE 14 Paqes
REPRESENTATIVE DIVISION
fJ IC D[V.
O SEMICONDUCTOR APPLICATION
= LCD DIV.
DIV.
Cl ELECTRONIC COMPONENTS DIV.
a
< DEVICE SPECIFICATION FOR
Dot Matrix LCD Unit
(20-character/2-line Display
STHC gray type)
,MODEL No.
LM20A21
*
CICUSTOMER’S APPROVAL
DATE
BY
PRESENTED
BY~
% cc- ,>,’ M&
H. NakajiinaV
Department General Manager
Engineering Department
LCD Division
ELECOM Group
SHAW COWOWTION
1 page  
LM20A21
4
4.3 Timing characteristics
Table 4
VDD=5.0Vk5%
Ta =O~50T
Parameter
Symbol
Min. Typ. Hax.
Enable cycle time
Enable pulse width
tcycE
PWEH
1000 - -
450 - -
Enadle r i s e / f a l l t i m e
tEr,tEf
-
25
RS, R/W setup time
tAS
140 - -
Address hold time
tAH
10 - -
Data setup time
Data delay time
tDSW
tD~R
195 - -
320
Data hold time (write)
tH
10 -
Data hold time(read)
tDHR
20 - -
T i m i n g c h a r t : S e e F i g . 1.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
4.4 Interface signals
Table 5
Pin No. Symbol
Description
1 Vss Ground potential
2 VD D Power supply
3 Vo Contrast adjustment
= voltage
Register select signal
Connection
GND : OV
+5V
Adjust the contrast by changing the
supply voltage from OV to 5V.
Control s i g n a l i n p u t s
Read/write select signal
(For details, see section 6 and 7.)
Operation(data read/write
enable signal)
It? DB,
Code 1/0 data LSB
C o d e 1/0 data 2nd bit
Data bus line
( . DB, may also he used to check
the
9 DB* Code 1/0 data 3rd bit
I
I 10 I DB3
busy flag.
arc no[ used when
w
5 Page 
.—
1. I n s t r u c t i o n S e t
Instruction
Display clear
Display/cursor home
Entry mode set
D i s p l a y ON}OFF
Display/cursor shift
Function set
CG RAH a d d r e s s s e t
DD RAM address set
Busy flag/address counter
read
CC RAHfDD R A M d a t a w r i t e
C C RAM/DD RAH data read
Table 7
Cod e
RS R/U DBJ DBt DEs DE. DBJ DB2 DB ] DBo
o 0 0 00 0 0 0 0 1
o 0 0 0 0 0 0 0“ 1 q
o 0 0 0 0 0 0 1 1/0 s
Function
7
C l e a r e n t i r e d i s p l a y area, r e s t o r e d i s p l a y f r o m s h i f t , and
l o a d q d d r e s s c o u n t e r w i t h DD RAM a d d r e s s OOH.
Restore display from shift and load address counter with
DD RAM q d d r e s s OOH.
Spscify c u r s o r a d v a n c e d i r e c t i o n a n d d i s p l a y s h i f t m o d e .
This operation takes place after each data transfer.
o
0
0
0
0
0
1
Dc
B s p e c i f y q c t i v a t i o n o f d i s p l a y ( D ) , cureor (C), q n d blinking
o f c h a r a c t e r at c u r s o r p o s i t i o n ( B ) .
o “ o o 0 0 1 Slc RIL q h Shift d i s p l a y o r m o v e c u r s o r .
o 0 0 0 1 DL 1 0 ‘ q Set i n t e r f a c e d a t a l e n g t h (DL).
o00 1
ACG
bad t h e a d d r e s s c o u n t e r w i t h a C C RAN addreas.
S u b s e q u e n t d a t a i s C C RAM d a t a .
o01
ADD
L o a d the a d d r e s s c o u n t e r w i t h a D D RAM a d d r e s s .
S u b s e q u e n t data is DD RAM d a t a .
o 1 BF
AC
R e a d busy f l a g ( B F ) a n d c o n t e n t s o f a d d r e s s c o u n t e r ( A C ) .
10
11
b/rita data
Read data
Urlcs data to C C R A M o r D O R A N .
R e s d d a t a f r o m CC RAJI o r D D R A N .
I / D - l : increment,
I / D - O : Decrement
SIC-I: Shift display,
SIC-O: H o v e c u r s o r
.s .1: S h i f t d i s p l a y ,
s -O: ‘Freeze display
R / L - l : Shift right,
R / L - O : S h i f t Ieft
4
D -1: D i s p l a y O N ,
D -O: Display OFF
D L -1: 8-bit,
D L - O : L-bit
“c .1: Cursor ON,
c .0: Cursor OFF
B -1: C h a r a c t e r at cursor B -O: Character at cursor
p o s i t i o n blirlks,
p o s i t i o n unbllnks
BF -1: D u r i n g i n t e r n a l
operation,
BF - O : E n d o f i n t e r n a l
operation
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet LM20A21.PDF ] | |
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