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PDF ML9044 Data sheet ( Hoja de datos )
| Número de pieza | ML9044 | |
| Descripción | DOT MATRIX LCD CONTROLLER DRIVER | |
| Fabricantes | OKI electronic componets | |
| Logotipo |  |
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E2B0055-19-61
¡¡SemicondSucetormiconductor
ML9044
DOT MATRIX LCD CONTROLLER DRIVER
This version: JunM. 1L9990944
GENERAL DESCRIPTION
The ML9044 used in combination with an 8–bit or 4–bit microcontroller controls the operation
of a character type dot matrix LCD.
FEATURES
• Easy interfacing with 8–bit or 4–bit microcontroller
• Switchable between serial and parallel interfaces
• Dot–matrix LCD controller/driver for a small (5 ¥ 7 dots) or large (5 ¥ 10 dots) font
• Built–in circuit allowing automatic resetting at power–on
• Built–in 17 common signal drivers and 120 segment signal drivers
• Built–in character generation ROM capable of generating 160 small characters (5 ¥ 7 dots) or
32 large characters (5 ¥ 10 dots)
• Creation of character patterns by programming: up to 8 small character patterns (5 ¥ 8 dots) or
up to 4 large character patterns (5 ¥ 11 dots)
• Built–in RC oscillation circuit using external or internal resistors
• Program–selectable duties: 1/9 duty (1 line: 5 ¥ 7 dots + cursor + arbitrator), 1/12 duty (1 line:
5 ¥ 10 dots + cursor + arbitrator), or 1/17 duty (2 lines: 5 ¥ 7 dots + cursor + arbitrator)
• Built–in bias dividing resistors to drive the LCD
• Bi–directional transfer of segment outputs
• Bi–directional transfer of common outputs
• Equipped with a 120–dot arbitrator
• Display shifting on each line
• Built–in contrast control circuit
• Built–in voltage multiplier circuit
• Chip (Gold Bump) Product name : ML9044CVWA
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¡ Semiconductor
ML9044
Symbol
CSR
SSR
V1, V2, V3A, V3B, V4
BEB
Description
The input pin to select the transfer direction of the common signal output data.
Refer to the Expansion Instruction Codes section about the AS bit.
CSR duty
L 1/9
L 1/9
L 1/12
L 1/12
L 1/17
L 1/17
H 1/9
H 1/9
H 1/12
H 1/12
H 1/17
H 1/17
AS bit
L
H
L
H
L
H
L
H
L
H
L
H
shift direction
COM1 Æ COM9
COM2 Æ COM9, COM1
COM1 Æ COM12
COM2 Æ COM12, COM1
COM1 Æ COM17
COM2 Æ COM17, COM1
COM9 Æ COM1
COM8 Æ COM1, COM9
COM12 Æ COM1
COM11 Æ COM1, COM12
COM17 Æ COM1
COM16 Æ COM1, COM17
arbitrator's common pin
COM9
COM1
COM12
COM1
COM17
COM1
COM1
COM9
COM1
COM12
COM1
COM17
The input pin to select the transfer direction of the segment signal output data.
“L”: Data transfer from SEG1 to SEG120
“H”: Data transfer from SEG120 to SEG1
The pins to output bias voltages to the LCD.
For 1/4 bias : The V2 and V3B pins are shorted.
For 1/5 bias : The V3A and V3B pins are shorted.
The input pin to enable or disable the voltage multiplier circuit.
“L” disables the voltage multiplier circuit. “H” enables the voltage multiplier circuit.
The voltage multiplier circuit doubles the input voltage VIN and outputs it to the V5IN pin.
The voltage multiplier circuit can be used only when generating a level lower than GND.
VIN
V5, V5IN
VC
VCC
The pin to input voltage to the voltage multiplier.
The pins to supply the LCD drive voltage.
The LCD drive voltage is supplied to the V5 pin when the voltage multiplier is not used
(BEB = 0) and the internal contrast adjusting circuit is also not used. At this time, the
V5IN pin should be open.
The LCD drive voltage is supplied to the V5IN pin when the voltage multiplier is not used
(BEB = 0) but the internal contrast adjusting circuit is used. At this time, the V5 pin
should be open.
When the voltage multiplier is used (BEB = 1), the V5IN and V5 pins should be open (the
multiplied voltage is output to the V5IN pin). In this case, the internal contrast adjusting
circuit is used automatically.
The pin to connect the positive pin of the capacitor for the voltage multiplier.
The pin to connect the negative pin of the capacitor used for the voltage multiplier.
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¡ Semiconductor
Note 6:
0.7VDD
0.3VDD
0.7VDD
0.3VDD
trf tff
Applied to the pulses entering from the OSC1 pin
Note 7: For 1/4 bias, V2 and V3B pins are short–circuited. V3A pin is open.
For 1/5 bias, V3A and V3B pins are short–circuited. V2 pin is open.
ML9044
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ML9044.PDF ] | |
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