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ML9477 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 4 Page - LAPIS Semiconductor Co., Ltd.

๋ถ€ํ’ˆ๋ช… ML9477
์ƒ์„ธ๋‚ด์šฉ  1/3 or 1/4 Duty, 32-Output LCD Driver
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์ œ์กฐ์‚ฌ  LAPIS [LAPIS Semiconductor Co., Ltd.]
ํ™ˆํŽ˜์ด์ง€  http://www.lapis-semi.com/
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ML9477 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 4 Page - LAPIS Semiconductor Co., Ltd.

 
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FEDL9477-01
ML9477
4/20
PIN DESCRIPTION
Symbol
I/O
Description
OSC
I/O
Pin for oscillation. Has a Schmitt circuit built in.
An oscillator circuit can be configured by connecting one external resistor and one
external capacitor.
Since an oscillator circuit is susceptible to external noise, make the wiring
between this pin and external components as short as possible. An external clock
input can be selected by CLKSEL.
The relationship between oscillation frequency fOSC and frame frequency fFRM is:
fFRM = fOSC/24
(*1)
DATA_IN
I
Serial data input pin. Has a Schmitt circuit built in.
The LCD display is turned on when the input data signal is at a โ€œHโ€ level and
turned off when the input data signal is at a โ€œLโ€ level.
CLOCK
I
Shift clock input pin. Has a Schmitt circuit built in.
Data to the DATA_IN pin is shifted in sync with the rising edges of the shift clock
pulses.
LOAD
I
Load pulse input pin. Has a Schmitt circuit built in.
Used to transfer serially input data to the display latch or write commands.
TEST
I
IC test pin. Has a pull-down resistor built in.
Leave this pin open or connect it to VSS when not used.
CLKSEL
I
OSC pin input switching pin.
When using the built-in oscillator circuit, set this pin to a โ€œLโ€ level; when inputting
an external clock, set this pin to a โ€œHโ€ level. While this pin is at a โ€œHโ€ level, the
oscillator circuit connected is disabled.
3/4SEL
I
1/3- or 1/4-duty switching input pin. When โ€œHโ€ level is input, 1/3 duty is selected
and when โ€œLโ€ level is input, 1/4 duty is selected.
RESET
I
Reset signal input pin for initializing the IC. Has a Schmitt circuit built in.
This pin is enabled by setting it to โ€œLโ€ level. This pin has a built-in pull-up resistor.
Normally, this pin, when connected with an external capacitor, performs power-on
reset.
(*2)
COM1
COM2
COM3
COM4
O
Output pins for LCD display. Connect to the common pins of the LCD panel.
- When 1/3 duty is selected:
Common signals are outputted through the COM1, COM2, and COM3 pins.
Leave the COM4 pin open.
- When 1/4 duty is selected:
Common signals are outputted through the COM1, COM2, COM3, and COM4
pins.
SEG1 to SEG32
O
Output pins for LCD display. Connect to the segment pins of the LCD panel.
For the relationship between each output of these pins and data, see the section
on โ€œData Structure.โ€
LVDD
๏€ญ๏€ 
Logic power supply pin.
DVDD
๏€ญ๏€ 
LCD driver power supply pin.
VSS
๏€ญ๏€ 
Ground pin.


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