PCF2119FUSLASH2SLASHF2 datasheet(62/79 Pages) NXP

62 / 79 page

PCF2119X_5

Product data sheet

Rev. 05 — 13 August 2009

62 of 79

NXP Semiconductors

PCF2119x

LCD controllers/drivers

16.12 I2C-bus operation, 1-line display

A control byte is required with most commands (see Table 42).

Return_home

returns both display and cursor to the

original position (address 0)

0000000010

PHILIPS

MICROCOM

Table 41.

8-bit operation, 2-line display example; using external reset (character set ‘A’) …continued

Instruction

Step

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

Operation

Table 42.

Example of I2C-bus operation; 1-line display (using external reset, assuming pin SA0 = VSS)[1]

Step

I2C-bus byte

Display

Operation

1I2C-bus start

initialized; no display appears

slave address for write

during the acknowledge cycle SDA will be

pulled-down by the PCF2119x

SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/WAck

011101001

send a control byte for Function_set

control byte sets RS for following data bytes

Ack

000000001

Function_set

selects 1-line display and VLCD =V0; SCL

pulse during acknowledge cycle starts

execution of instruction

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

001X

00001

Display_ctl

turns on display and cursor; entire display

shows character code 20h (blank in

ASCII-like character sets)

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

000011101

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

7I2C-bus start

for writing data to DDRAM, RS must be set

to 1; therefore a control byte is needed

slave address for write

SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/WAck

011101001

send a control byte for Write_data

Ack

010000001

Write_data to DDRAM

writes ‘P’; the DDRAM has been selected at

power-on; the cursor is incremented by 1

and shifted to the right

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

010100001

Write_data to DDRAM

writes ‘H’

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

010010001

12 to 15

PHILIP

writes ‘ILIP’

PCF2119FU/2/F2 Datasheet(PDF) 62 Page - NXP Semiconductors

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