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Table 9

12

write data to CGRAM or DDRAM

PHILIPS

sets mode for display shift at the time of write

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 MICROCO_

0000000111

13

write data to CGRAM or DDRAM

HILIPS

writes ‘M’; display is shifted to the left; the first and second lines

shift together

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 ICROCOM_

1011001101

14

|

|

|

15

return home

PHILIPS

returns both display and cursor to the original position

(address 0)

RS

R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 MICROCOM

0000000010

STEP

INSTRUCTION

DISPLAY

OPERATION

initialized; no display appears

2

slave address for write

during the acknowledge cycle SDA will be pulled-down by the

PCF2105

SA6

SA5

SA4

SA3

SA2

SA1

SA0

R/W

Ack

011101001

3

send a control byte for function set

control byte sets RS and R/W for following data bytes

Co

RS

R/W

Ack

0001

4

function set

selects 1-line display; SCL pulse during acknowledge cycle

starts execution of instruction

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

Ack

001

X

0

0001

5

display control

_

turns display and cursor on; entire display shows character

hexadecimal 20 (blank in ASCII-like character sets)

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

Ack

000011101

6

entry mode set

_

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

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

display is not shifted

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

Ack

000001101

STEP

INSTRUCTION

DISPLAY

OPERATION