PCF2113DUSLASH2SLASHF4 datasheet(27/65 Pages) NXP

27 / 65 page

PCF2113_FAM_4

Product data sheet

Rev. 04 — 4 March 2008

27 of 65

NXP Semiconductors

PCF2113x

LCD controllers/drivers

9.1 Clear display

‘Clear display’ writes character code 20h into all DDRAM addresses (the character pattern

for character code 20h must be a blank pattern), sets the DDRAM address counter to 0

and returns the display to its original position, if it was shifted. Thus, the display

disappears and the cursor or blink position goes to the left edge of the display. Sets entry

mode I/D = 1 (increment mode). S of entry mode does not change.

The instruction ‘clear display’ requires extra execution time. This may be allowed by

checking the Busy Flag (BF) or by waiting until the 165 clock cycles have elapsed.

The latter must be applied where no read-back options are foreseen, as in some

Chip-On-Glass (COG) applications.

Table 11.

Explanation of symbols

Bit

Logic 0

Logic 1

last control byte

another control byte follows after

data/command

select instruction register

select data register

data length: 4 bits

data length: 8 bits

M (no impact if SL = 1)

1 line

× 24 character display

2 line

× 12 character display

MUX 1:18 (1 line

× 24 character

or 2 line

× 12 character display)

MUX 1:9 (1 line

× 12 character

display)

use basic instruction set

use extended instruction set

I/D

decrement

increment

display freeze

display shift

display off

display on

cursor off

cursor on

cursor character blink off;

character at cursor position does

not blink

cursor character blink on;

character at cursor position blinks

S/C

cursor move

display shift

R/L

left shift

right shift

L (no impact if M = 1 or

SL = 1)

left/right screen;

standard connection

left/right screen;

mirrored connection

1st 12 characters of 24;

columns are from 1 to 60

1st 12 characters of 24;

columns are from 60 to 1

2nd 12 characters of 24;

columns are from 1 to 60

2nd 12 characters of 24;

columns are from 60 to 1

column data; left to right; column

data is displayed from 1 to 60

column data; right to left; column

data is displayed from 60 to 1

row data; top to bottom; row data

is displayed from 1 to 16 and icon

row data is in 17 and 18

row data; top to bottom; row data

is displayed from 16 to 1 and icon

row data is in 18 and 17

Character mode; full display

Icon mode; only icons displayed

icon blink disabled

icon blink enabled

Direct mode disabled

Direct mode enabled

set VA

set VB

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