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PDF SPLC780A1 Data sheet ( Hoja de datos )
| Número de pieza | SPLC780A1 | |
| Descripción | 16COM/40SEG CONTROLLER/DRIVER | |
| Fabricantes | Sunplus | |
| Logotipo |  |
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SPLC780A1
16COM/40SEG CONTROLLER/DRIVER
GENERAL DESCRIPTION
The SPLC780A1, a dot-matrix LCD controller and driver from SUNPLUS, is a unique design for displaying
alpha-numeric, Japanese-Kana characters and symbols. The SPLC780A1 provides two types of interfaces to
MPU: 4-bit and 8-bit interfaces. The transferring speed of 8-bit is twice faster than 4-bit. A single SPLC780A1
is able to display up to two 8-character lines. By cascading with SPLC100 or SPLC063, the display capability
can be extended. The CMOS technology ensures the power saves in the most efficient way and the
performance keeps in the highest rank.
FEATURES
Character generator ROM: 7200 bits
Á Character font 5 x 7 dots: 160 characters
Á Character font 5 x 10 dots: 32 characters
Character generator RAM: 512 bits
Á Character font 5 x 7 dots: 8 characters
Á Character font 5 x 10 dots: 4 characters
Provide connecting to 4-bit or 8-bit MPU
Direct driver for LCD: 16 COMs x 40 SEGs
Duty factor (selected by program):
Á 1/8 duty: 1 line of 5 x 7 dots
Á 1/11 duty: 1 line of 5 x 10 dots
Á 1/16 duty: 2 lines of 5 x 7 dots / line
Built-in power on automatic reset circuit
Built-in oscillator circuit (with external resistor)
Support external clock operation
BLOCK DIAGRAM
OSC1
OSC2
VDD
VSS
DB3-0
DB7-4
RS
R/W
E
Power
Supply
for LCD
Drive :
(V5-1)
Timing Generation Circuit
Parallel to Serial Data Conversion Circuit
ÁÁ
Busy Flag Character Character Cursor
Generator Generator
Blink
ROM
RAM
Control
 Data
Â
Circuit
Â
I / O Register
Ã
Â
Buffer
 Instruction  Instruction
à Display
Data RAM
80 Bytes
Register
Decorder Ã
à Address
Counter
40-bit
Shift
Register
ÄÅ
ÄÅ
Latch
40
Circuit
Segments
x
16
16-bit ÆÇ Commons
Shift
Register
LCD
Driver
CL1,CL2
M
D
COM16-1
SEG40 - 1
Sunplus Technology Co., Ltd.
1
Rev.: 1.2 2000.05.05
Free Datasheet http://www.datasheet4u.net/
1 page  
SPLC780A1
11. Read Data from Character Generator RAM or Display Data RAM
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Code
11dddddddd
It reads data (dddddddd)2 from character generator RAM or display data RAM.
To get the correct data readout is shown belows:
(i) Set the address of the character generator RAM or display data RAM or shift the cursor instruction.
(ii) Send the “ Read ” instruction.
8-Bit operation and 8-digit 1-line display (using internal reset)
No. Instruction
Display
1 Power on . ( SPLC780A1 starts initializing )
Function set
2 RS R/WDB7DB6DB5DB4DB3DB2 DB1DB0
0 0 0 0 1 1 0 0XX
Display on / off control
3
0000001110
_
Entry mode set
4 0000000110
_
Write data to CG RAM / DD RAM
5
1001010111
Write data to CG RAM / DD RAM
6
1001000101
W_
WE_
Operation
Power on reset . No display .
Set to 8-bit operation and select 1-line
display line and character font .
Display on .
Cursor appear .
Increase address by one .
It will shift the cursor to the right when
writing to the DD RAM / CG RAM .
Now the display has no shift .
Write " W " .
The cursor is incremented by one and
shifted to the right .
Write " E " .
The cursor is incremented by one and
shifted to the right .
7
Write data to CG RAM / DD RAM
8 1001000101
Entry mode set
9
0000000111
Write data to CG RAM / DD RAM
10
1000100000
Write data to CG RAM / DD RAM
11
1001000011
WELCOME_
WELCOME_
ELCOME _
LCOME C_
Write " E " .
The cursor is incremented by one and
shifted to the right .
Set mode for display shift when writing
Write " "(space) .
The cursor is incremented by one and
shifted to the right .
Write " C " .
The cursor is incremented by one and
shifted to the right .
12
Sunplus Technology Co., Ltd.
5 Rev.: 1.2 2000.05.05
Free Datasheet http://www.datasheet4u.net/
5 Page 
SPLC780A1
DISPLAY DATA RAM (DD RAM)
The DD RAM stores display data and its RAM size is 80 bytes. The area in DD RAM that is not used for display
can be used as a general data RAM. Its address is set in the address counter. There are the relations between
the display data RAM s address and the LCD s position shown belows.
1-line display , 80 display characters
1 234 56
79 80
Display position
00 01 02 03 04 05
4E 4F
Display data RAM
address
( Example ) 1-line display , 8 display characters
1 234 5678
00 01 02 03 04 05 06 07
Display position
Display data RAM
address
When the display shift operation is performed , the display data RAM’s address moves as :
( i ) Left shift
( ii ) Right shift
01 02 03 04 05 06 06 07 08
4F 00 01 02 03 04 05 06
CHARACTER GENERATOR ROM (CG ROM)
Using 8-bit character code, the character generator ROM generates 5 x 7 dot or 5 x 10 dot character patterns.
It also can generate 160 5 x 7 dot character patterns and 32 5 x 10 dot character patterns.
CHARACTER GENERATOR RAM (CG RAM)
Using the programs, users can easily change the character patterns in the character generator RAM. It can be
written with 5 x 7 dots, 8 character patterns or written with 5 x 10 dots, 4 character patterns.
Sunplus Technology Co., Ltd.
11
Rev.: 1.2 2000.05.05
Free Datasheet http://www.datasheet4u.net/
11 Page | ||
| Páginas | Total 38 Páginas | |
| PDF Descargar | [ Datasheet SPLC780A1.PDF ] | |
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