MC141535 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC141535

LCD Segment / Common Driver with Controller

Motorola => Freescale 

Command Description

Set Display On/Off (Display Mode / Stand-by Mode)

This Displat On command turns the LCD Common and Segment out-

puts on and has no effect to the annunciator output. This command

starts the conversion of data in GDDRAM to necessary waveforms on

the Common and Segment driving outputs. The on-chip bias generator

is also turned on by this command. (Note : "Oscillator On" command

should be sent before "Display On" is selected)

The Display Off command turns the display off and the states of the

LCD driver are as follow during display off :

1. The Common and Segment outputs are fixed at VLL1 (VSS).

2. The bias Voltage Generator is turned off.

3. The RAM and content of all registers are retained.

4. IC will accept new commands and data.

The status of the Annunciators and Oscillator are not affected by this

command. The Oscillator is not affected by this command either.

Set Horizontal Scroll

This command is used in combination with “Set Horizontal Scroll

Value” to set the LCD driver to scroll the display horizontally. The next

input from D0 to D7 is the scroll value. Note that Row16 is not affected

by this command.

Set Horizontal Scroll Value

When display is turned on, this command maps the selected

GDDRAM column (00H-A0H) to Seg0-Seg160. With scroll value equals

to 0, Col 0 of GDDRAM is mapped to Seg0 and Col 1 through Col 160

are mapped to Seg 1 through Seg160 respectively. With Scroll value

equals to 1, Col 1 of GDDRAM is mapped to Seg 0, then Col 2 through

Col 160 will be mapped to Seg 1 through Seg 159 respectively and Col

0 will be mapped to Seg 160. This command must issue follow com-

mand "Set Horizontal Scroll".

Set GDDRAM Column Address

This command positions the address pointer on a column location.

The address can be set to location 00H-A0H (161 columns) in combina-

tion with the command “Set MSB of GDDRAM Column Address“. The

column address will be increased automatically after a read or write

operation. Refer “Address Incement Table” and command “Set

GDDRAM Page Address” for further information.

Set MSB of GDDRAM Column Address

This command set the MSB of the GDDRAM Column address

pointer. Set this MSB to 0 for accessing the 00H-7FH address; while set

this MSB to 1 for accessing 80H-A0H address

Set GDDRAM Page Address

This command positions the row address to 1 of 3 possible positions

in GDDRAM. Refer to figure 5.

Master Clear GDDRAM

This command is to clear the content of page 1 and 2 of the Display

Data RAM. Issue this command followed by a dummy write command.

Master Clear Icons

This command is used to clear the data in page 3 of GDDRAM which

storing the icon line data. Before using this command, set the page

address to page 3 by the command “Set GDDRAM Page Address”. A

dummy write data operation is also needed after this “Master Clear

Icons” command to make the clear icon action effective.

Set Display Mode

This command switch the driver to full display mode or icon display

mode. In low power icon mode, only icons (driven by COM16) and

annunciators are displayed.

Set Vertical Scroll Value

This command maps the selected GDDRAM row (00H-0FH) to

Com0. With scroll value equals to 0, Row 0 of GDDRAM is mapped to

Com0 and Row 1 through Row 15 are mapped to Com1 through

Com15 respectively. With scroll value equal to 1, Row 1 of GDDRAM is

mapped to Com0, then Row 2 through Row 15 will be mapped to Com1

through Com14 respectively and Row 0 will be mapped to Com15.

Save / Restore Column Address

With bit option = 1 in this command, the Save / Restore Column

Address command saves a copy of the Column Address of GDDRAM.

With a bit option = 0, this command restores the copy obtained from the

previous execution of saving column address. This instruction is very

useful for writing full graphics characters that are larger than 8 pixels

vertically.

Set Column Mapping

This instruction selects the mapping of GDDRAM to Segment drivers

for mechanical flexibility. There are 2 mappings to select:

1. Column 0 - Column 160 of GDDRAM mapped to Seg0-Seg160

respectively;

2. Column 0 - Column 160 of GDDRAM mapped to Seg160-Seg0

respectively.

Detail information please refer to section “Display Output Descrip-

tion”.

Set Row Mapping

This instruction selects the mapping of GDDRAM to Common Drivers

for mechanical flexibility. There are 2 selected mappings:

1. Row 0 - Row 15 of GDDRAM to Com0 - Com15 respectively;

2. Row 0 - Row 15 of GDDRAM to Com15 - Com0 respectively.

Output of Row 16 (Com16) will not be changed by this command.

See section “Display Output Description” for related information.

Set Annunciator Control Signals

This command is used to control the active states of the 4 stand

alone annunciator drivers.

Set Oscillator Enable / Disable

This command is used to either turn on or off the oscillator. For using

internal or external oscillator, this command should be executed. The

setting for this command is not affected by command “Set Display On/

Off” and “Set Annunciator Control Signals”. See command “Set Exter-

nal / Internal Oscillator” for more information

Set External / Internal Oscillator

This command is used to select either internal or external oscillator.

When Internal Oscillator is selected, feedback resistor between OSC1

and OSC2 is needed. For external oscillation circuit, feed clock input

signal to OSC2 and leave OSC1 open.

Set Internal DC/DC Converter On/Off

Use this command selects the Internal DC/DC Converter to generate

the VCC from AVDD. Turn off the Internal DC/DC Converter if external

Vcc is provided.

Set Voltage Doubler / Tripler

Use this command to select Doubler or Tripler when the Internal DC/

DC Converter is on.

Set Internal Regulator On/Off

Choose bit option 0 to disable the Internal Regulator. Choose bit

MOTOROLA

MC141535

3–87

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