MC141531 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC141531

LCD Segment / Common Driver CMOS

Motorola => Freescale 

Set Internal Regulator On/Off

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

option 1 to enable Internal Regulator which consists of the internal

contrast control and temperature compensation circuits.

Set Internal Voltage Divider On/Off

If the Internal Voltage Divider is disabled, external bias can be

used for VLL6 to VLL2. If the Internal Voltage Divider is enabled, the

internal circuit will generated the 1:5 bias driving voltage.

Set Internal Contrast Control On/Off

This command is used to turn on or off the internal control of delta

voltage of the bias voltages. With bit option = 1, the software selec-

tion for delta bias voltage control is enabled. With bit option = 0, inter-

nal contrast control is disabled.

COMMAND TABLE

Increase / Decrease Contrast Level

If the internal contrast control is enabled, this command is used to

increase or decrease the contrast level within the 16 contrast levels.

The contrast level starts from lowest value after POR.

Set Contrast Level

This command is to select one of the 16 contrast levels when inter-

nal contrast control circuitry is in use. After power-on reset, the con-

trast level is the lowest.

Set Temperature Coefficient

This command can select 4 different LCD driving voltage tempera-

ture coefficients to match various liquid crystal temperature grades.

Those temperature coefficients are specified in Electrical Character-

istics Tables.

Bit Pattern

000000X1X0

0001X3X2X1X0

0010000X0

0010001X0

0010010X0

0010100X0

0010101X0

0010110X0

0010111X0

0011000X0

0011001X0

0011010X0

00110110

00110111

0011101X0

Command

Set GDDRAM Page Address

Set Contrast Level

Set Voltage Doubler / Tripler

Set Column Mapping

Set Row Mapping

Set Display On/Off

Set Internal DC/DC Converter On/Off

Set Internal Regulator On/Off

Set Internal Voltage Divider On/Off

Set Internal Contrast Control On/Off

Set Display Mode

Save/Restore GDDRAM Column

Address

Master Clear GDDRAM

Master Clear of Icons

Reserved.

Comment

Set GDDRAM Page Address using X1X0 as address bits.

X1X0=00 : page 1 (POR)

X1X0=01 : page 2

X1X0=10 : page 3

With R/W pin input low, set one of the 16 available values to the

internal contrast register, using X3X2X1X0 as data bits. The con-

trast register is reset to 0000 during POR.

X0=0 : Set Voltage Tripler (POR)

X0=1 : Set Voltage Doubler

X0=0 : Col0 to Seg0 (POR)

X0=1 : Col0 to Seg119

X0=0 : Row0 to Com0

X0=1 : Row0 to Com15

X0=0 : display off (POR)

X0=1 : display on

X0=0 : Internal DC/DC Converter off(POR)

X0=1 : Internal DC/DC Converter on

X0=0 : Internal Regulator off(POR)

X0=1 : Internal Regulator on

When application uses a supply with built-in temperature compen-

sation, the regulator should be disabled.

X0=0 : Internal Voltage Divider off (POR)

X0=1 : Internal Voltage Divider on

When an external bias network is preferred, the voltage divider

should be disabled.

X0=0 : Internal Contrast Control off (POR)

X0=1 : Internal Contrast Control on

Internal contrast circuits can be disabled if external contrast cir-

cuits is preferred.

X0=0 : normal display mode (1/16 or 1/17 mux) (POR)

X0=1 : low power icon display mode

X0=0 : restore address

X0=1 : save address

Master clear page 1 and 2 of GDDRAM

Master Clear of icon line (Com16)

X0=0: normal operation (POR)

X0=1: test mode

(Note: Make sure to set X0=0 during application)

MC141531

3–154

MOTOROLA

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