PCF2105MU View Datasheet(PDF) - Philips Electronics

Part Name

Description

MFG CO.

PCF2105MU

LCD controller/driver

Philips Electronics 

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STEP

INSTRUCTION

22 slave address for read

SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/W Ack

011101011

DISPLAY

PHILIPS

OPERATION

during the acknowledge cycle the content of the DR is loaded

into the internal I2C-bus interface and 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

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

PHILIPS

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

XXXXXXXX1

24 read data: 8 × SCL + master acknowledge; note 2

PHILIPS

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

010010000

25 read data: 8 × SCL + no master acknowledge; note 2

PHILIPS

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

010010011

26 I2C-bus stop

PHILIPS

8 × SCL; content loaded into interface during previous

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

during master acknowledge content of DDRAM address 01 is

loaded into the I2C-bus interface

8 × SCL; code of letter ‘H’ is read first; during master

acknowledge code of letter ‘I’ is loaded into the I2C-bus

interface

no master acknowledge; after the content of the I2C-bus

interface register is shifted out no internal action is performed;

no new data is loaded to the interface register; DR is not

updated; AC is not incremented and cursor is not shifted

Notes

1. X = don’t care.

2. SDA is left at high-impedance by the microcontroller during the READ acknowledge.

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