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ST7066U Schematic ( PDF Datasheet ) - Sitronix

Teilenummer ST7066U
Beschreibung Dot Matrix LCD Controller/Driver
Hersteller Sitronix
Logo Sitronix Logo 




Gesamt 42 Seiten
ST7066U Datasheet, Funktion
www.DataSheet4U.com
ST
Sitronix
ST7066U
Dot Matrix LCD Controller/Driver
!"Features
#" 5 x 8 and 5 x 11 dot matrix possible
#" Low power operation support:
#" -- 2.7 to 5.5V
#" Wide range of LCD driver power
-- 3.0 to 10V
#" Correspond to high speed MPU bus
interface
-- 2 MHz (when VCC = 5V)
#" 4-bit or 8-bit MPU interface enabled
#" 80 x 8-bit display RAM (80 characters max.)
#" 13,200-bit character generator ROM for a
total of 240 character fonts(5 x 8 dot or 5 x 11
dot)
#" 64 x 8-bit character generator RAM
-- 8 character fonts (5 x 8 dot)
-- 4 character fonts (5 x 11 dot)
#" 16-common x 40-segment liquid crystal
display driver
!"Description
The ST7066U dot-matrix liquid crystal display
controller and driver LSI displays alphanumeric,
Japanese kana characters, and symbols. It can be
configured to drive a dot-matrix liquid crystal display
under the control of a 4- or 8-bit microprocessor.
Since all the functions such as display RAM,
character generator, and liquid crystal driver, required
for driving a dot-matrix liquid crystal display are
internally provided on one chip, a minimal system can
be interfaced with this controller/driver.
The ST7066U has pin function compatibility with the
HD44780, KS0066 and SED1278 that allows the user
to easily replace it with an ST7066U. The ST7066U
character generator ROM is extended to generate
#" Programmable duty cycles
-- 1/8 for one line of 5 x 8 dots with cursor
-- 1/11 for one line of 5 x 11 dots & cursor
-- 1/16 for two lines of 5 x 8 dots & cursor
#" Wide range of instruction functions:
Display clear, cursor home, display on/off,
cursor on/off, display character blink, cursor
shift, display shift
#" Pin function compatibility with HD44780,
KS0066 and SED1278
#" Automatic reset circuit that initializes the
controller/driver after power on
#" Internal oscillator with external resistors
#" Low power consumption
#" QFP80 and Bare Chip available
240 5x8(5x11) dot character fonts for a total of 240
different character fonts. The low power supply (2.7V
to 5.5V) of the ST7066U is suitable for any portable
battery-driven product requiring low power
dissipation.
The ST7066U LCD driver consists of 16 common
signal drivers and 40 segment signal drivers which
can extend display size by cascading segment driver
ST7065 or ST7063. The maximum display size can
be either 80 characters in 1-line display or 40
characters in 2-line display. A single ST7066U can
display up to one 8-character line or two 8-character
lines.
Product Name
ST7066U-0A
ST7066U-0B
ST7066U-0E
Support Character
English / Japan
English / European
English / European
V2.0
1/42
2001/03/01






ST7066U Datasheet, Funktion
www.DataSheet4U.com
ST7066U
!"Pad Configuration(80 QFP)
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
S11
S10
S09
S08
S07
S06
S05
S04
S03
S02
S01
GND
OSC1
SSSSSSSSSSSSSSSS
2222222333333333
3456789012345678
8777777777766666
0987654321098765
1 64
2 63
3 62
4 61
5 60
6 59
7 58
8 57
9 56
10 55
11 54
12 53
13 52
14 51
15 50
16 49
17 48
18 47
19 46
20 45
21 44
22 43
23 42
24 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 41
5678901234567890
O V V V V V C C V MD R R E D D
S1 2 34 5LLC
SW
BB
C 12C 01
2
S39
S40
C16
C15
C14
C13
C12
C11
C10
C09
C08
C07
C06
C05
C04
C03
C02
C01
DB7
DB6
DB5
DB4
DB3
DB2
V2.0
6/42
2001/03/01

6 Page









ST7066U pdf, datenblatt
www.DataSheet4U.com
ST7066U
#" Character Generator ROM (CGROM)
The character generator ROM generates 5 x 8 dot or 5 x 11 dot character patterns from 8-bit character codes. It
can generate 240 5 x 8 dot character patterns. User-defined character patterns are also available by
mask-programmed ROM.
#" Character Generator RAM (CGRAM)
In the character generator RAM, the user can rewrite character patterns by program. For 5 x 8 dots, eight
character patterns can be written, and for 5 x 11 dots, four character patterns can be written.
Write into DDRAM the character codes at the addresses shown as the left column of Table 4 to show the
character patterns stored in CGRAM.
See Table 5 for the relationship between CGRAM addresses and data and display patterns. Areas that are not
used for display can be used as general data RAM.
#" Timing Generation Circuit
The timing generation circuit generates timing signals for the operation of internal circuits such as
DDRAM, CGROM and CGRAM. RAM read timing for display and internal operation timing by MPU
access are generated separately to avoid interfering with each other. Therefore, when writing data to
DDRAM, for example, there will be no undesirable interference, such as flickering, in areas other than
the display area.
#" LCD Driver Circuit
LCD Driver circuit has 16 common and 40 segment signals for LCD driving. Data from CGRAM/CGROM is
transferred to 40 bit segment latch serially, and then it is stored to 40 bit shift latch. When each common is
selected by 16 bit common register, segment data also output through segment driver from 40 bit segment latch.
In case of 1-line display mode, COM1 ~ COM8 have 1/8 duty or COM1 ~ COM11 have 1/11duty , and in 2-line
mode, COM1 ~ COM16 have 1/16 duty ratio.
#" Cursor/Blink Control Circuit
It can generate the cursor or blink in the cursor/blink control circuit. The cursor or the blink appears in the digit at
the display data RAM address set in the address counter.
V2.0
12/42
2001/03/01

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