PCA2117DUGSSLASHDA datasheet(17/107 Pages) NXP

17 / 107 page

PCA2117

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Product data sheet

Rev. 4 — 8 April 2015

17 of 107

NXP Semiconductors

PCA2117

Automotive LCD driver for character displays

8.1.2.3

Command: Entry_mode_set

The Entry_mode_set command sets the address stepping and the shift of the display.

[1]

Default value.

Bit I_D: When bit I_D = 1 the DDRAM, CGRAM, or ICON-RAM address increments by 1

when data is written into or read from the DDRAM, CGRAM or ICON-RAM. The cursor or

blink position moves to the right.

When bit I_D = 0 the DDRAM, CGRAM, or ICON-RAM address decrements by 1 when

data is written into or read from the DDRAM, CGRAM or ICON-RAM. The cursor or blink

position moves to the left.

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 remains and the display moves. The display does not shift

when reading from the DDRAM, CGRAM or ICON-RAM or when writing to or from the

DDRAM, CGRAM or ICON-RAM.

Table 20.

Entry_mode_set - entry mode bit description

Bit

Symbol

Value

Description

-R/W

fixed value

RS[1:0]

fixed value

7 to 2

001010

fixed value

1I_D

address stepping select

DDRAM, CGRAM or ICON-RAM address

decrements by 1, cursor moves to the left

1[1]

DDRAM, CGRAM or ICON-RAM address

increments by 1, cursor moves to the right

display shift select

0[1]

display does not shift

1display shifts

Command: Entry_mode_set, S = 1, display line setting: 2 line

 20 characters.

Fig 3.

Example of the display shift

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