PCF2119RU2DB2 datasheet(33/83 Pages) NXP

33 / 83 page

PCF2119X

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Product data sheet

Rev. 7 — 15 November 2010

33 of 83

NXP Semiconductors

PCF2119x

LCD controllers/drivers

10.2.2.3

Entry_mode_set

Bit I_D: When bit I_D = 1 the DDRAM or CGRAM address increments by 1 when data is

written into or read from the DDRAM or CGRAM. The cursor or blink position moves to the

right.

When bit I_D = 0 the DDRAM or CGRAM address decrements by 1 when data is written

into or read from the DDRAM or CGRAM. The cursor or blink position moves to the left.

The cursor underline and cursor character blink are inhibited when the CGRAM is

accessed.

Bit S: When bit S = 0, the display does not shift.

During DDRAM write, when bit S = 1 and bit I_D = 0, the entire display shifts to the right;

when bit S = 1 and bit I_D = 1, the entire display shifts to the left.

Thus it appears as if the cursor stands still and the display moves. The display does not

shift when reading from the DDRAM, or when writing to or reading from the CGRAM.

10.2.2.4

Display_ctl instructions

Table 18.

Entry_mode_set bit description

Bit

Symbol

Value

Description

see Table 10

R/W

-0

7 to 2

000001

fixed value

1I_D

address increment or decrement

DDRAM or CGRAM address decrements by 1,

cursor moves to the left

DDRAM or CGRAM address increments by 1,

cursor moves to the right

shift display to the left or right

display does not shift

1display shifts

Table 19.

Display_ctl bit description

Bit

Symbol

Value

Description

see Table 10

R/W

-0

7 to 3

00001

fixed value

display on or off

display is off; chip is in power-down mode

display is on

cursor on or off

cursor is off

cursor is on

character blink on or off

character blink is off

character blink is on

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