PCF2114 查看數據表（PDF） - NXP Semiconductors.

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PCF2114

LCD controller/drivers

NXP Semiconductors. 

Table 8 Example of I2C operation; 1-line display (using internal reset, assuming SA0 = VSS; note 1)

STEP

I2C BYTE

DISPLAY

OPERATION

1 I2C START

Initialized. No display appears.

2 slave address for write

SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/W Ack

011101001

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

PCF2116.

3 send a control byte for function set

Co RS R/W

Ack

0 0 0XXXXX1

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

4 function set

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

001X00001

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

acknowledge cycle starts execution of instruction.

5 display on/off control

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

0 0 0 0 1 1 1 0 1_

Turns on display and cursor. Entire display shows character

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

6 entry mode set

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

000001101

_

7 I2C START

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.

For writing data to DDRAM, RS must be set to 1. Therefore a

_

control byte is needed.

8 slave address for write

SA6 SA5 SA4 SA3 SA2 SA1 SA0 R/W Ack

0 1 1 1 0 1 0 0 1_

9 send a control byte for write data

Co RS R/W

Ack

0 1 0 X X X X X 1_

10 write data to DDRAM

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Ack

0 1 0 1 0 0 0 0 1 P_

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

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

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