PCF2116CUSLASH10 datasheet(47/64 Pages) NXP

47 / 64 page

Table 8

Example of I2C operation; 1-line display (using internal reset, assuming SA0 = VSS; note 1)

STEP

I2C BYTE

DISPLAY

OPERATION

1I2C START

Initialized. No display appears.

slave address for write

SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/W Ack

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

PCF2116.

011101001

send a control byte for function set

R/W

Ack

Control byte sets RS and R/W for following data bytes.

XXXX

function set

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

Ack

Selects 1-line display and VLCD =V0; SCL pulse during

acknowledge cycle starts execution of instruction.

001

0001

display on/off control

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

Ack

Turns on display and cursor. Entire display shows character

Hex 20 (blank in ASCII-like character sets).

000011101

entry mode set

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

Ack

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.

000001101

7I2C 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/W

Ack

011101001

send a control byte for write data

R/W

Ack

XXXX

write data to DDRAM

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

Ack

Writes ‘P’. The DDRAM has been selected at power-up.

The cursor is incremented by 1 and shifted to the right.

010100001

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