PCF8553DTTSLASHAY datasheet(51/51 Pages) NXP

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NXP Semiconductors

PCF8553

40 × 4 LCD segment driver

Contents

General description ............................................ 1

Features and benefits .........................................1

Applications .........................................................1

Ordering information .......................................... 2

4.1

Ordering options ................................................ 2

Block diagram ..................................................... 2

Pinning information ............................................ 3

6.1

Pinning ...............................................................3

6.2

Pin description ................................................... 3

Functional description ........................................4

7.1

Registers of the PCF8553 ................................. 4

7.2

Command registers of the PCF8553 ................. 6

7.2.1

Command: Device_ctrl ...................................... 6

7.2.1.1

Internal oscillator and clock output .................... 6

7.2.2

Command: Display_ctrl_1 ..................................6

7.2.2.1

Enhanced power drive mode .............................7

7.2.2.2

Multiplex drive mode ......................................... 7

7.2.3

Command: Display_ctrl_2 ..................................7

7.2.3.1

Blinking .............................................................. 8

7.2.3.2

Line inversion (driving scheme A) and

frame inversion (driving scheme B) ................... 8

7.3

Starting and resetting the PCF8553 .................. 8

7.3.1

Power-down mode .............................................9

7.3.2

Power-On Reset (POR) .....................................9

7.3.3

Hardware reset: RST pin ...................................9

7.3.4

Command: Software_reset .............................. 10

7.4

Display data register mapping ......................... 10

Possible display configurations ...................... 13

8.1

LCD bias generator ......................................... 14

8.2

LCD voltage selector ....................................... 15

8.2.1

Electro-optical performance .............................16

8.2.2

LCD drive mode waveforms ............................ 17

8.2.2.1

Static drive mode .............................................17

8.2.2.2

1:2 Multiplex drive mode ................................. 18

8.2.2.3

1:3 Multiplex drive mode ................................. 20

8.2.2.4

1:4 Multiplex drive mode ................................. 21

8.3

Backplane and segment outputs ..................... 22

8.3.1

Backplane outputs ........................................... 23

8.3.2

Segment outputs ............................................. 23

Power Sequencing ............................................23

9.1

Power-on ..........................................................23

9.2

Power-off ..........................................................23

9.3

Power sequences ............................................ 23

Bus interfaces ................................................... 24

10.1

I2C-bus interface ............................................. 24

10.1.1

Bit transfer ....................................................... 25

10.1.2

START and STOP conditions .......................... 25

10.1.3

Acknowledge ....................................................25

10.1.4

I2C interface protocol ...................................... 26

10.1.4.1 Write protocol ...................................................26

10.1.4.2 Read protocol .................................................. 26

10.1.4.3 I2C-bus slave address .....................................26

10.2

SPI-bus interface ............................................. 27

10.2.1

Data transmission ............................................27

10.2.1.1 Write protocol ...................................................28

10.2.1.2 Read protocol .................................................. 28

10.3

EMC detection ................................................. 29

Internal circuitry ................................................29

Safety notes .......................................................30

Limiting values ..................................................30

Characteristics .................................................. 31

Application information ....................................38

15.1

Power-on reset ................................................ 38

15.2

I2C acknowledge after power-on .....................38

15.3

Resistors on I/O pins .......................................38

Package outline .................................................39

Handling information ........................................ 40

Packing information ..........................................40

18.1

Tape and reel information ................................40

Soldering of SMD packages .............................40

19.1

Introduction to soldering .............................

19.2

Wave and reflow soldering .........................

19.3

Wave soldering ...........................................

19.4

Reflow soldering .........................................

Footprint information ........................................43

Appendix ............................................................44

21.1

LCD segment driver selection ......................... 44

Abbreviations .................................................... 46

References .........................................................46

Revision history ................................................ 46

Legal information ..............................................48

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section 'Legal information'.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 20 April 2021

Document identifier: PCF8553

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