PCF8536AT datasheet(53/53 Pages) NXP

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NXP Semiconductors

PCA8551

Automotive 36 × 4 LCD segment driver

Contents

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

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

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

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

4.1

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

Block diagram ..................................................... 3

Pinning information ............................................ 4

6.1

Pinning ...............................................................4

6.2

Pin description ................................................... 6

Functional description ........................................7

7.1

Registers of the PCA8551 .................................7

7.2

Command registers of the PCA8551 .................8

7.2.1

Command: Device_ctrl ...................................... 8

7.2.1.1

Internal oscillator and clock output .................... 9

7.2.2

Command: Display_ctrl_1 ..................................9

7.2.2.1

Enhanced power drive mode ...........................10

7.2.2.2

Multiplex drive mode ....................................... 10

7.2.3

Command: Display_ctrl_2 ................................10

7.2.3.1

Blinking ............................................................ 10

7.2.3.2

Line inversion (driving scheme A) and

frame inversion (driving scheme B) ................. 10

7.3

Starting and resetting the PCA8551 ................ 11

7.3.1

Power-down mode ...........................................11

7.3.2

Power-On Reset (POR) ...................................11

7.3.3

Hardware reset: RST pin (only PCA8551A) .....12

7.3.4

Command: Software_reset .............................. 12

7.4

Display data register mapping ......................... 12

Possible display configurations ...................... 15

8.1

LCD bias generator ......................................... 16

8.2

LCD voltage selector ....................................... 17

8.2.1

Electro-optical performance .............................18

8.2.2

LCD drive mode waveforms ............................ 20

8.2.2.1

Static drive mode .............................................20

8.2.2.2

1:2 Multiplex drive mode ................................. 20

8.2.2.3

1:3 Multiplex drive mode ................................. 22

8.2.2.4

1:4 Multiplex drive mode ................................. 23

8.3

Backplane and segment outputs ..................... 24

8.3.1

Backplane outputs ........................................... 25

8.3.2

Segment outputs ............................................. 25

Power Sequencing ............................................25

9.1

Power-on ..........................................................25

9.2

Power-off ..........................................................25

9.3

Power sequences ............................................ 25

Bus interfaces ................................................... 26

10.1

I2C-bus interface of the PCA8551A .................26

10.1.1

Bit transfer ....................................................... 27

10.1.2

START and STOP conditions .......................... 27

10.1.3

Acknowledge ....................................................27

10.1.4

I2C interface protocol ...................................... 28

10.1.4.1 Write protocol ...................................................28

10.1.4.2 Read protocol .................................................. 28

10.1.4.3 I2C-bus slave address .....................................28

10.2

SPI-bus interface of the PCA8551B ................ 29

10.2.1

Data transmission ............................................29

10.2.1.1 Write protocol ...................................................30

10.2.1.2 Read protocol .................................................. 30

10.3

EMC detection ................................................. 31

Internal circuitry ................................................31

Safety notes .......................................................31

Limiting values ..................................................32

Characteristics .................................................. 33

Application information ....................................40

15.1

Power-on Reset ...............................................40

15.2

I2C acknowledge after power-on .....................40

15.3

Resistors on I/O pins .......................................40

Test information ................................................ 40

16.1

Quality information ...........................................40

Package outline .................................................41

Handling information ........................................ 42

Packing information ..........................................42

19.1

Tape and reel information ................................42

Soldering of SMD packages .............................42

20.1

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

20.2

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

20.3

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

20.4

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

Footprint information ........................................45

Appendix ............................................................46

22.1

LCD segment driver selection ......................... 46

Abbreviations .................................................... 48

References .........................................................48

Revision history ................................................ 49

Legal information ..............................................50

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: 3 May 2021

Document identifier: PCA8551

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