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Table 7

Example of 8-bit operation; 1-line display; using internal reset (character set ‘M’)

STEP

INSTRUCTION

DISPLAY

OPERATION

1

power supply on (PCF2105 is initialized by the internal reset

function)

initialized; no display appears

2

function set

sets to 8-bit operation; selects 2

× 12 display

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

0000110000

3

display control

_

turns display and cursor on; entire display is blank after

initialization

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

0000001110

4

entry mode set

_

sets mode to increment the address by 1 and to shift the cursor

to the right at the time of the write to the DDRAM or CGRAM;

display is not shifted

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

0000000110

5

write data to CGRAM or DDRAM

P_

writes ‘P’; the DDRAM has already been selected by

initialization at power-on; the cursor is incremented by 1 and

shifted to the right

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1011010000

6

write data to CGRAM or DDRAM

PH_

writes ‘H’

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1011001000

7

|

|

|

8

write data to CGRAM or DDRAM

PHILIPS_

writes ‘S’

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1011010011

9

entry mode set

PHILIPS_

sets mode for display shift at the time of write

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

0000000111

10

write data to CGRAM or DDRAM

HILIPS_

writes space

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1000100000

11

write data to CGRAM or DDRAM

ILIPS M_

writes ‘M’

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1011001101