PCF2113X datasheet(24/72 Pages) PHILIPS

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Table 5

Instruction set with parallel bus commands

INSTRUCTION

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

DESCRIPTION

REQUIRE

CLOCK

CYCLES

H=0or1

NOP

0000000000

no operation

Function set

00001

sets interface Data Length (DL), number of display

lines (M), single line/MUX 1 : 9 (SL) and extended

instruction set control (H)

Read busy ﬂag

and address

counter

reads the Busy Flag (BF) indicating internal

operating is being performed and reads Address

counter (AC) contents

Read data

read data

reads data from CGRAM or DDRAM

Write data

write data

writes data from CGRAM or DDRAM

H=0

Clear display

0000000001

clears entire display and sets DDRAM address 0 in

address counter

165

Return home

0000000010

sets DDRAM address 0 in address counter; also

returns shifted display to original position; DDRAM

contents remain unchanged

Entry mode set

00000001

I/D

sets cursor move direction (I/D) and speciﬁes shift

of display (S); these operations are performed

during data write and read

Display control

0000001

sets entire display on/off (D), cursor on/off (C) and

blink of cursor position character (B); D = 0 (display

off) puts chip into the Power-down mode

Cursor/display

shift

000001

S/C

R/L

moves cursor or shifts display (S/C) to right or left

(R/L) without changing DDRAM contents

Set CGRAM

address

0001

ACG

sets CGRAM address; bit DB6 is to be set by the

command ‘set DDRAM address’; look at the

description of the commands

Set DDRAM

address

001

ADD

sets DDRAM address

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