UM10744 - NXP Semiconductors
Contents
1. board is OM13035 which contains the LPC 1115 MCU Switches Three switches are present on the board SW1 SW2 and SWS At the time of writing this user manual functionality was not implemented in software yet Jumpers The board contains a number of jumpers Below they are listed along with their functionality e VBAT This jumper connects the two AA batteries to the subsequent boost converter Remove if the board will be stocked with the batteries inserted e J1 This jumper connects the Vicp pin of the LCD drivers to the voltage VLCD_EXT which is generated on the base board if supply option 3 is used However if also the internal voltage generator is enabled this can cause damage to the LCD driver If the internal voltage generator is used jumper J1 should be removed e JP3 JP4 JP5 JP6 These jumpers need only be placed when the SPI interface is used which is only possible if PCA8537BH is mounted on the board In all other All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 6 of 14 NXP Semiconductors U M1 0744 OM13500 amp OM13500A user manual cases communication with the LCD driver is through the I C bus This are pins 40 and 41 of the LPCXpresso connector e IDD_IC3 This jumper is not soldered onto the board during manufacturing Instead a 0 O resistor R11 is mounted in parallel with this jumper Rem2. export control regulations Export may require a prior authorization from competent authorities Translations A non English translated version of a document is for reference only The English version shall prevail in case of any discrepancy between the translated and English versions 6 3 Trademarks Notice All referenced brands product names service names and trademarks are property of their respective owners NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 12 of 14 NXP Semiconductors U M1 0744 OM13500 amp OM13500A user manual 7 List of figures Fig 1 Top view of OM13500 demo board 4 Fig 3 PCB ay OUD serienn e O aR 9 Fig 2 OM13500 schematic eee 8 UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 13 of 14 NXP Semiconductors UM10744 OM13500 amp OM13500A user manual 8 Contents 1 INTRODUCTION aicniecccccctcssccendecticsatecceecedsncncecteapeessesess 2 Board description and layout cccssseseseeee 2 1 Power SUPPLY siscsscsccsccccsessscecesasiciessasasiesseaceorssazes 2 2 LP XPIESSO ee csssiics Seeders soelenceadees aaia 2 3 SI e 6 gt gt ananin anan nn anaran anaran anaran nnana 2 4 JUMPETS itirdin 2 5 Use of internal external oscillator 2 6 CONNEctOrS cccceeeesesesesesesereserereeees 3 Board schemati
3. to 18 V For the adapter a plug CON1 has been provided where the internal pin is It is also possible to connect the voltage to two pins P3 using a DC power supply A diode protects against damage in case of wrong polarity Two linear regulators IC1 and IC2 provide 5V 5V_ext and the external Vicp voltage VLCD_EXT in case the internal charge pump is not used This external voltage VLCD_EXT can be adjusted using potentiometer POT1 PCA9620 and PCA8537 include a temperature compensated internal Vicp generator The third power supply option allows switching quickly between an external supplied or internal generated Vicp This is useful for evaluating the optical performance as a function of the voltage Vicp as the external supplied voltage can be varied quickly using potentiometer POT 1 If the external V_cp supply option is used also jumper J1 must be placed Also the internal charge pump must be disabled Switch SW1 is used to select which of the three power supply options is being selected 5V_BAT 5V_USB or 5V_EXT The 5V output of the switch is used to supply the backlight of the display Furthermore the voltage labeled 3V3_LPCXPR is generated with an additional regulator IC5 The 3 3V are used to supply the microcontroller board LPCXpresso and to supply the logic Vpp of the LCD driver The LPCXpresso board contains a JTAG SWD debugger called the LPC Link and a target MCU LPC Link is equipped with a 10 pin JTAG header an
4. 3 UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 7 of 14 UM10744 OM13500 amp OM13500A user manual NXP Semiconductors Ucar R T EPIT I LLLI Eie F str eck S Dawes rs a is 3 EEN OM13500 schematic Fig 2 UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 8 of 14 NXP Semiconductors UM10744 OM13500 amp OM13500A user manual PCAS620 de 8 Segment driver C to 105 C riere temperature Vdd range from 2 5V to 5 5V 400 kHz 2C bus 1 80 or bare die PERSE s 44 8 LOD Se me 40 C to 95 C 400 kHz I2C bus ni or 5 MHz SPI Vdd irange from 1 8 VE features see reverse side with 80 bonding pads G TT package _ N Static or 2 AEC Q100 compliant Suitable to drive TN and Ve Integrated charge pump for Vied Programmable ternperature compe ot Temperature sensor with read out Programmable bias configuration Mid range from 2 5 V to 9 0 V 7 ot boo A 72 a IDD_IC3 ony WZ bem d wE Cc D o SPI 4 6 8 multip Common features of NN drivers lt lt ma dispk Programmable Frame frequency 60 Hz to EE _ b
5. UM10744 OM13500 amp OM13500A PCA9620 amp PCx8537 demo board Rev 1 23 September 2013 User manual Document information Info Content Keywords LCD Liquid Crystal Display LCD driver segment driver PCA9620 PCF8537 PCA8537 LPCXpresso Vertical Alignment VA Abstract The OM13500 is an LCD demo board which can be used to demonstrate and evaluate the PCA9620 segment driver The OM13500A is the same board but instead of PCA9620 PCA8537 is mounted The latter has a reduced number of segment outputs and therefore is not able to drive all display elements of the display on the board The only affected part is the dot matrix area on the display The board is controlled by an LPCXpresso micro controller board which contains the LPC1115 a Cortex MO controller A free IDE can be downloaded in order to modify the software Supply of the board can be via two AA batteries an AC adapter or USB NXP Semiconductors U M1 0744 OM13500 amp OM13500A user manual Revision history Rev Date Description 1 20130923 Initial version Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 2 of 14 NXP Semiconductors U M1 0744 OM13500 amp OM13500A user manu
6. V I2CWrite 11 0b10000000 control byte T2CWrite 12 xee Set MUX mode to 1 8 I2CWrite 13 b19e e eeee control byte I2Cwrite 14 xC5 Set 1 4 bias I2CWrite 15 0b10000000 control byte I2CWrite 16 xD4 Driving scheme A charge pump 1 MHz I2CWrite 17 0b10000000 control byte T2CWrite 18 0x72 Set frame frequency 240 Hz T2Cwrite 19 0b10000000 control byte I2CWrite 20 0x39 Display enable I2CWrite 21 0b100000090 control byte I2CWrite 22 0x80 Set Data pointer I2CWrite 23 0b00100000 Write to DDRAM All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 10 of 14 NXP Semiconductors U M1 0744 OM13500 amp OM13500A user manual 5 References The documents listed below provide further useful information They are available at NXP s website www nxp com 1 LPCXPresso Getting started with NXP LPCXpresso 2 PCA9620 Product data sheet 3 PCA8537 Product data sheet 4 PCF8537 Product data sheet 5 UM10204 I C bus specification and user manual 6 AN11267 EMC amp system level ESD design guidelines for LCD drivers 7 NXP LPCXpresso http Awww nxp com Ipcxpresso 8 NXP LPCZone hitp Awww nxp com Ipczone UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserv
7. able temperature compensation has been included This board was developed in order to provide a low cost tool to engineers wishing to demonstrate and evaluate these LCD drivers and to get hands on experience with writing code for these drivers Code written using this board can serve as an example for the final application This enables rapid prototyping Features e Demonstrates PCA9620 LQFP80 or PCA8537 TQFP64 LCD driver e Features a vertical alignment VA display module with integrated backlight e Plugged in OM13035 LPCXpresso board with LPC1115 microcontroller e 3 push buttons e User modifiable firmware In System In Application Programming ISP IAP via USB e Power supply can be either using 2 AA batteries via USB or via an AC adapter external power supply This can also be used for external Vi cp e Box contents o OM13500 or OM13500A board marked on the board o OM13035 LPCXpresso board The 12nc of the OM13500 board is 9353 014 42598 UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 3 of 14 NXP Semiconductors U M1 0744 OM13500 amp OM13500A user manual 2 Board description and layout Fig 1 shows the top view of the board p v I Ea SERER eR Feeeeeeeeeeeeeeeeeeeeeneeee feereeeeceeeeeeweetaneneeegere EN Fig 1 Top view of OM13500 demo board For best op
8. accepts no liability for any assistance with applications or customer product design It is customer s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer s applications and products planned as well as for the planned UM10744 All information provided in this document is subject to legal disclaimers application and use of customer s third party customer s Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products NXP Semiconductors does not accept any liability related to any default damage costs or problem which is based on any weakness or default in the customer s applications or products or the application or use by customer s third party customer s Customer is responsible for doing all necessary testing for the customer s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer s third party customer s NXP does not accept any liability in this respect Evaluation products This product is provided on an as is and with all faults basis for evaluation purposes only NXP Semiconductors its affiliates and their suppliers expressly disclaim all warranties whether express implied or statutory including but not limited to the implied warranties of non infringement m
9. al 1 Introduction This user manual describes the OM13500 and OM13500A demo boards The boards consist of a base board with a plugged in LPCXpresso board which contains the microcontroller to control the display driver OM13500 and OM13500A are essentially the same The difference lies only in the segment driver which is mounted on the board Only one driver can be mounted For OM13500 this is the PCA9620 The PCA9620 is a peripheral device which interfaces to almost any Liquid Crystal Display LCD with low multiplex rates It generates the drive signals for any static or multiplexed LCD containing up to eight backplanes 60 segments and up to 480 display elements On the OM13500A PCA8537BH is used instead This driver generates the drive signals for any static or multiplexed LCD containing up to eight backplanes 46 segments and 352 elements Both display drivers are compatible with most microprocessors or microcontrollers PCA9620 communicates via a two line bidirectional I C bus The PCA8537 can be easily connected to a microcontroller by either the two line I C bus PCA8537AH or a three line bidirectional SPl bus PCA8537BH Communication overheads are minimized using a display RAM with auto incremented addressing and display memory switching Both PCA9620 and PCA8537 feature an internal charge pump for on chip generation of the LCD driving voltages To ensure an optimal and stable contrast over the full temperature range also a programm
10. c and layout 4 Software code example ss sssssssnssnnnnunennnnnnnnnnn 5 Referent S sic ccsccsscscte cece ccssesscectearvesstessncecteeeseccees 6 Legal information cssssessseeeessseeensseeneeneee 6 1 Definitions cccccceseseseseessseseeseessesseeeeseeeaes 6 2 DISCIAIMENS 222225225522 Sochvcetocteces er ae a a 6 3 Trademarks ccccecececececeeeeeeeeeeeeeeeeeeeeeeseneneeees 7 List Of figUreS sssssssennssennsennnnnnnnnnnnnnnnnnnnnnnnnnnna 8 COMLCIS E Please be aware that important notices concerning this document and the product s described herein have been included in the section Legal information NXP B V 2013 All rights reserved For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com Date of release 23 September 2013 Document identifier UM10744
11. customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors Right to make changes NXP Semiconductors reserves the right to make changes to information published in this document including without limitation specifications and product descriptions at any time and without notice This document supersedes and replaces all information supplied prior to the publication hereof Suitability for use NXP Semiconductors products are not designed authorized or warranted to be suitable for use in life support life critical or safety critical systems or equipment nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury death or severe property or environmental damage NXP Semiconductors accepts no liability for inclusion and or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and or use is at the customer s own risk Applications Applications that are described herein for any of these products are for illustrative purposes only NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products and NXP Semiconductors
12. d it seamlessly connects to the target via USB the USB interface and other debug features are provided by NXP s ARM9 based LPC3154 MCU When the firmware needs to be updated the LPCXpresso board will be connected using the USB to the computer on which the IDE is installed In this case a 3 3V supply is generated on the LPCXpresso board via a linear regulator which is integrated in the LPC3154 However this regulator has limited current delivery capability If the LPCXpresso board is connected via USB to a computer without any other supply to the base board the 3 3V from the LPCXpresso board is used to supply also the LCD base board In this case the backlight will have limited intensity but enough to see the result of software changes Supply is via diode D2 and resistor R9 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 5 of 14 NXP Semiconductors U M1 0744 UM10744 2 2 2 3 2 4 OM13500 amp OM13500A user manual For better contrast it is possible to supply the base board via USB connector P1 and the LPCXpresso via a second USB cable connected to the computer LPCXpresso LPCXpresso is a low cost development platform available from NXP The software consists of an enhanced Eclipse based IDE a GNU C compiler linker libraries and an enhanced GDB debugger The hardware consists of the LPCXpresso development b
13. ed User manual Rev 1 23 September 2013 11 of 14 NXP Semiconductors UM10744 6 Legal information OM13500 amp OM13500A user manual 6 1 Definitions Draft The document is a draft version only The content is still under internal review and subject to formal approval which may result in modifications or additions NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information 6 2 Disclaimers Limited warranty and liability Information in this document is believed to be accurate and reliable However NXP Semiconductors does not give any representations or warranties expressed or implied as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information In no event shall NXP Semiconductors be liable for any indirect incidental punitive special or consequential damages including without limitation lost profits lost savings business interruption costs related to the removal or replacement of any products or rework charges whether or not such damages are based on tort including negligence warranty breach of contract or any other legal theory Notwithstanding any damages that customer might incur for any reason whatsoever NXP Semiconductors aggregate and cumulative liability towards
14. erchantability and fitness for a particular purpose The entire risk as to the quality or arising out of the use or performance of this product remains with customer In no event shall NXP Semiconductors its affiliates or their suppliers be liable to customer for any special indirect consequential punitive or incidental damages including without limitation damages for loss of business business interruption loss of use loss of data or information and the like arising out the use of or inability to use the product whether or not based on tort including negligence strict liability breach of contract breach of warranty or any other theory even if advised of the possibility of such damages Notwithstanding any damages that customer might incur for any reason whatsoever including without limitation all damages referenced above and all direct or general damages the entire liability of NXP Semiconductors its affiliates and their suppliers and customer s exclusive remedy for all of the foregoing shall be limited to actual damages incurred by customer based on reasonable reliance up to the greater of the amount actually paid by customer for the product or five dollars US 5 00 The foregoing limitations exclusions and disclaimers shall apply to the maximum extent permitted by applicable law even if any remedy fails of its essential purpose Export control This document as well as the items s described herein may be subject to
15. i a Sou Frame or line inversion eeceeeesess Suasseeas e PL2MLSKL2 Fig 3 PCB layout The LPCXpresso board and battery holder are on the reverse side of the base board UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 9 of 14 NXP Semiconductors UM10744 OM13500 amp OM13500A user manual 4 Software code example UM10744 Section 8 of the PCA9620 data sheet contains all the commands and their description In order to be able to write software for this driver it will be necessary to read the datasheet Below an example for the configuration of the PCA9620 for use with the LCD on this board is listed Exact details of how to write the functions are left to the programmer This example shows the data to be sent to the PCA9620 to configure it for the module on this board These settings will also work for PCA8537 I2CWrite PCA962 _ADDR T2CWrite 1 0b10000000 control byte I2CWrite 2 xCC Internal oscillator no CLKOUT T2CWrite 3 0b10000000 control byte I2CWrite 4 xC3 Charge pump enabled Vlcd 3 Vdd I2CWrite 5 0b10000000 control byte I2CWrite 6 xCB Temp compensation and meas enabled I2CWrite 7 0b10000000 control byte I2CWrite 8 0x47 set VLCD MSB 0111 I2CWrite 9 0b10000000 control byte I2CWrite 10 x5A set VLCD LSB 101 VLCD 6 66
16. oard which has an LPC Link debug interface and an NXP LPC ARM based microcontroller target LPCXpresso is an end to end solution enabling embedded engineers to develop their applications from initial evaluation to final production The LPCXpresso IDE is based on the popular Eclipse development platform and includes several LPC specific enhancements It is an industry standard GNU tool chain with an optimized C library that gives engineers all the tools necessary to develop high quality software solutions quickly and cost effectively The C programming environment includes professional level features There is syntax coloring source formatting function folding on and offline help and extensive project management automation The LPCXpresso target board jointly developed by NXP Code Red Technologies and Embedded Artists includes an integrated JTAG debugger LPC Link so there is no need for a separate JTAG debug probe The target portion of the board can connect to expansion boards to provide a greater variety of interfaces and I O devices The on board LPC Link debugger provides a high speed USB to JTAG SWD interface to the IDE and it can be connected to other debug targets such as a customer prototype Users can also use the LPCXpresso IDE with the Red Probe JTAG adapter from Code Red Technologies Refer to the Getting started with NXP LPCXpresso listed in the references for more information The board included with the base
17. oving the 0 Q resistor and mounting the jumper makes it easy to insert a current meter and measure the current consumption to the Vdd pins of PCA9620 After measurements a jumper header can be inserted e IDD_IC8 This jumper along with 0 Q resistor R17 fulfills the same function as IDD_IC3 but for the PCA8537 Note that either PCA9620 or PCA8537 is mounted never both In addition a few SMD 0 Q resistors are mounted for I C address selection The expectation is that these will seldom be removed but it allows selecting a different C slave address for PCA9620 resistors R4 R7 or PCA8537 R18 and R20 without cutting tracks on the PCB 2 5 Use of internal external oscillator Both LCD drivers offer the option of using the internal or an external oscillator This can be set using the configuration registers If the internal oscillator is used the oscillator signal is available at connector CLK If an external oscillator signal is used this can be supplied to the LCD driver using this connector CLK 2 6 Connectors Besides the previously mentioned connectors connector P2 contains the C and SPI signals along with Vss and a reset signal This connector can be used to connect the baseboard to another application microcontroller In that case the LPCXpresso board must be removed 3 Board schematic and layout On the next pages the circuit diagram and PCB layout of the board are given Refer to Fig 2 and Fig
18. tical performance remove the protective foil from the display UM10744 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 1 23 September 2013 4 of 14 NXP Semiconductors U M1 0744 UM10744 2 1 OM13500 amp OM13500A user manual On the board below the NXP logo is indicated which version of the board OM13500 with PCA9620 or OM13500A with PCA8537 it is The LCD driver positions are located on the reverse side of the PCB below the LCD This location was chosen for layout reasons as it results in shorter traces from the driver to the LCD Power Supply The schematic diagram of the board is shown in Fig 2 Besides applying power via the plugged in LPCXpresso board there are three ways to provide power to the base board 1 Via mini USB connector P1 Now the 5V come directly from the USB port 2 Using two AA batteries An on board switching regulator built around IC4 generates 5V 5V_Bat Whenever the batteries are inserted this regulator is running The current consumption at no load is very low in the order of 20 pA Nevertheless it is advisable to remove the jumper labeled VBAT when the board will not be used for a longer time while the batteries are inserted This will interrupt the connection between batteries and switching regulator 3 Via an external AC DC adapter or DC power supply The voltage may be in the range from 7 V
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