PCF2113X datasheet(27/72 Pages) PHILIPS

27 / 72 page

2001 Dec 19

Philips Semiconductors

Product speciﬁcation

LCD controllers/drivers

PCF2113x

8.3

Entry mode set

8.3.1

BIT I/D

When I/D = 1 (0) the DDRAM or CGRAM address

increments (decrements) by 1 when data is written into or

read from the DDRAM or CGRAM. The cursor or blink

position moves to the right when incremented and to the

left when decremented. The cursor underline and cursor

character blink are inhibited when the CGRAM is

accessed.

8.3.2

BIT S

When S = 1, the entire display shifts either to the right

(I/D = 0) or to the left (I/D = 1) during a DDRAM write. 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.

When S = 0, the display does not shift.

8.4

Display control (and partial Power-down mode)

8.4.1

BIT D

The display is on when D = 1 and off when D = 0. Display

data in the DDRAM is not affected and can be displayed

immediately by setting D = 1.

When the display is off (D = 0) the chip is in partial

Power-down mode:

• The LCD outputs are connected to VSS

• The LCD generator and bias generator are turned off.

Three oscillator cycles are required after sending the

‘display off’ instruction to ensure all outputs are at VSS,

afterwards the oscillator can be stopped. If the oscillator is

running during partial Power-down mode (‘display off’) the

chip can still execute instructions. Even lower current

consumption is obtained by inhibiting the oscillator

(OSC = VSS).

To ensure IDD <1 µA, the parallel bus pins DB7 to DB0

should be connected to VDD; pins RS and R/W to VDD or

left open-circuit and pin PD to VDD. Recovery from

Power-down mode: PD back to VSS, if necessary pin OSC

back to VDD and send a ‘display control’ instruction with

D=1.

8.4.2

BIT C

The cursor is displayed when C = 1 and inhibited when

C = 0. Even if the cursor disappears, the display functions

I/D, etcetera, remain in operation during display data write.

The cursor is displayed using 5 dots in the 8th line (see

Fig.6).

8.4.3

BIT B

The character indicated by the cursor blinks when B = 1.

The cursor character blink is displayed by switching

between display characters and all dots on with a period of

approximately 1 second, with

The cursor underline and the cursor character blink can be

set to display simultaneously.

8.5

Cursor or display shift

‘Cursor/display shift’ moves the cursor position or the

display to the right or left without writing or reading display

data. This function is used to correct a character or move

the cursor through the display. In 2-line displays, the

cursor moves to the next line when it passes the last

position (40) of the line. When the displayed data is shifted

repeatedly all lines shift at the same time; displayed

characters do not shift into the next line.

The Address Counter (AC) content does not change if the

only action performed is shift display, but increments or

decrements with the ‘cursor display shift’.

8.6

Function set

8.6.1

BIT DL (PARALLEL MODE ONLY)

Sets interface data width. Data is sent or received in bytes

(DB7 to DB0) when DL = 1 or in two nibbles (DB7 to DB4)

when DL = 0. When 4-bit width is selected, data is

transmitted in two cycles using the parallel bus. In a 4-bit

application DB3 to DB0 should be left open-circuit (internal

pull-ups). Hence in the first ‘function set’ instruction after

power-on M, SL and H are set to logic 1. A second

‘function set’ must then be sent (2 nibbles) to set M,

SL and H to their required values.

‘Function set’ from the I2C-bus interface sets the DL bit to

logic 1.

8.6.2

BIT M

Selects either 1-line by 24 display (M = 0) or 2-line by

12 display (M = 1).

8.6.3

BIT SL

Selects MUX 1 : 9, 1-line by 12 display (independent of

M and L). Only rows 1 to 8 and 17 are to be used. All other

rows must be left open-circuit. The DDRAM map is the

same as in the 2-line by 12 display mode, however, the

second line cannot be displayed.

blink

OSC

52 224

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