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MC141531 bảng dữ liệu(PDF) 10 Page - Motorola, Inc

tên linh kiện MC141531
Giải thích chi tiết về linh kiện  LCD Segment / Common Driver CMOS
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nhà sản xuất  MOTOROLA [Motorola, Inc]
Trang chủ  http://www.freescale.com
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MC141531 bảng dữ liệu(HTML) 10 Page - Motorola, Inc

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MOTOROLA
3–148
MC141531
D/C (Data / Command)
This input pin tell the LCD driver the input at D0-D7 is data or com-
mand. Input High for data while input Low for command.
CS (CLK) (Input Clock)
This pin is normal Low clock input. Data on D0-D7 are latched at
the falling edge of CS.
RES (Reset)
An active Low pulse to this pin reset the internal status of the
driver (same as power on reset). The minimum pulse width is 10
µs.
D0-D7 (Data)
This bi-directional bus is used for data / command transferring.
R/W (Read / Write)
This is an input pin. To read the display data RAM or the internal
status (Busy / Idle), pull this pin High. The R/W input Low indicates a
write operation to the display data RAM or to the internal setup regis-
ters.
OSC1 (Oscillator Input)
For internal oscillator mode, this is an input for the internal low
power RC oscillator circuit. In this mode, an external resistor of cer-
tain value should be connected between the OSC1 and OSC2 pins
for a range of internal operating frequencies (refer to Figure 1). For
external oscillator mode, OSC1 should be left open.
OSC2 (Oscillator Output / External Oscillator Input)
For internal oscillator mode, this is an output for the internal low
power RC oscillator circuit. For external oscillator mode, OSC2 will
be an input pin for external clock and no external resistor is needed.
VLL6 - VLL2
Group of voltage level pins for driving the LCD panel. They can
either be connected to external driving circuit for external bias supply
or connected internally to built-in divider circuit if internal divider is
enable. For Internal DC/DC Converter enabled, a 0.1
µF capacitor to
AVSS is required on each pin.
C1N and C1P
If Internal DC/DC Converter is enabled, a 0.1
µF capacitor is
required to connect these two pins.
C2N and C2P
If Internal DC/DC Converter and Tripler are enabled, a 0.1
µF
capacitor is required between these two pins. Otherwise, leave these
pins open.
C+ and C-
If internal divider circuit is enabled, a 0.1
µF capacitor is required
to connect between these two pins.
VR and VF
This is a feedback path for the gain control (external contrast con-
trol) of VLL1 to VLL6. For adjusting the LCD driving voltage, it
requires a feedback resistor placed between VR and VF, a gain con-
trol resistor placed between VF and AVSS, a 10
µF capacitor placed
between VR and AVSS. (Refer to the Application Circuit)
COM0-COM16 (Row Drivers)
These pins provide the row driving signal to LCD panel. Output
is 0V during display off. COM16 also serves as the common driving
signal in the icon mode.
SEG0-SEG119 (Column Drivers)
These 120 pins provide LCD column driving signal to LCD panel.
They output 0V during display off.
BP (Annunciator Backplane)
This pin combines with Annun0-Annun2 pins to form annunciator
driving part. When the annunciator circuit is enabled, it will output
square wave of 30 Hz. It outputs low when oscillator is disabled.
Annun0 - Annun2 (Annunciator Frontplanes)
These pins are three independent annunciator driving outputs.
The enabled annunciator outputs from its corresponding pin a 30Hz
square wave which is 180 degrees out of phase with BP. Disabled
annunciator output from its corresponding pin an square wave in-
phase with BP. When all annunciators are disabled, all these pins
output 0V.
AVDD and AVSS
AVDD is the positive supply to the LCD bias Internal DC/DC Con-
verter. AVSS is ground.
VCC
For using the Internal DC/DC Converter, a 0.1
µF capacitor from
this pin to AVSS is required. It can also be an external bias input pin
if Internal DC/DC Converter is not used. Power is supplied to the
LCD Driving Level Selector and HV Buffer Cell with this pin. Nor-
mally, this pin is not intended to be a power supply to other compo-
nent.
DVDD and DVSS
Power is supplied to the digital control circuit of the driver using
these two pins. DVDD is power and DVSS is ground.
PIN DESCRIPTIONS


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