PCF2119VU-2 Ver la hoja de datos (PDF) - Philips Electronics

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PCF2119VU-2

LCD controllers/drivers

Philips Electronics 

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STEP

I2C BYTE

DISPLAY

12 to 15

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16 ‘write data’ to DDRAM

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack PHILIPS_

010100111

17 (optional I2C stop) I2C start + slave address for write PHILIPS_

(as step 8)

18 control byte

Co RS 0 0 0 0 0 0 Ack PHILIPS_

100000001

19 return home

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack PHILIPS

000000101

20 I2C start

PHILIPS

21 slave address for read

SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/W Ack PHILIPS

011101011

22 control byte for read

Co RS 0 0 0 0 0 0 Ack PHILIPS

011000001

23 ‘read data’: 8 × SCL + master acknowledge; note 2

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack PHILIPS

XXXXXXXX0

OPERATION

writes ‘S’

sets DDRAM address 0 in address counter (also returns shifted

display to original position; DDRAM contents unchanged); this

instruction does not update the Data Register (DR)

during the acknowledge cycle the content of the DR is loaded

into the internal I2C-bus interface to be shifted out; in the

previous instruction neither a ‘set address’ nor a ‘read data’ has

been performed; therefore the content of the DR was unknown;

the R/W has to be set to 1 while still in I2C-write mode

DDRAM content will be read from following instructions

8 × SCL; content loaded into interface during previous

acknowledge cycle is shifted out over SDA; MSB is DB7; during

master acknowledge content of DDRAM address 01 is loaded

into the I2C-bus interface

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