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um10267 pca9698 demonstrat ion board OM6281 rev. 01 ? 24 september 2008 user manual document information info content keywords i2c, pca9698, gpio abstract the OM6281 is an add-on to nxp?s i 2 c 2005-1 demo board. this daughter board makes it easy to te st and design with the pca9698, a fast-mode plus (fm+) 40-bit gpio dev ice. these boards, along with the i2cusb lite gui (pc based), provide an easy to use evaluation platform.
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 2 of 16 contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com nxp semiconductors um10267 pca9698 demonstration board OM6281 revision history rev date description 01 20080924 initial release
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 3 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 1. introduction the pca9698 evaluation featur es headers to access all gpio bits and leds for gpio (output) demonstration. in addition, a pca9530 led dimmer/blinker is on-board to demonstrate the capability of generating a complex dimming/blinking pattern simultaneously on 40 leds. the board can be connected is series with other i 2 c-bus demo-boards to create an evaluation system. the ic communicates to the host via the industry standard i 2 c-bus/smbus port. the evaluation software runs under ms windows pc platform. 2. features ? a complete evaluation platform for the pca9698 40-bit gpio ? easy to use gui-based software demonstr ates the capabilities of the pca9698 ? on-board leds for visual experience ? convenient test points for easy scope measurements and gpio access ? usb interface to the host pc ? no external power supply required 3. getting started 3.1 assumptions familiarity with the i 2 c-bus is helpful but not required. 3.2 static handling requirements 3.3 minimum system requirements ? pc pentium 60 processor (or equivalent), 8 mb ram, 10 mb of hard drive space ? one usb port (either 2.0 or 1.1 compatible) ? windows 98se, me, 2000, xp, or vista ? i 2 c 2005-1 demonstration board (om6275) 3.4 power requirements the nxp semiconductors i 2 c demonstration board 2005-1 and OM6281 hardware obtain power from the pc usb port. care should be taken not to exceed the usb port current capabilities. caution this device is sensitive to electrostatic di scharge (esd). therefore care should be taken during transport and handling. you must use a ground strap or touch the pc case or other grounded source before unpacking or handling the hardware.
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 4 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 4. installation 4.1 i 2 c 2005-1 board and win-12cusb lite software the OM6281 is a daughter card to the om6275 i2c2005-1 demo board. you may download the win-i2cusb lite soft ware, the om6275 user manual um10206, and find ordering information at the nxp web site www.standardics.nxp.com/support/boards/ . 4.2 OM6281 connection to i 2 c 2005-1 board the i 2 c 2005-1 board should be disconnected from your pc. the OM6281 board has a 9-pin female connector that allows the demo board to mount directly onto the i 2 c 2005-1 board at the jp1 location. connect the OM6281 board to the i 2 c 2005-1 board before connecting the usb cable. once the board is connected, connect th e usb cable and start the win-i2cusb lite software. you are now ready to evaluate the pca9698.
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 5 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 5. hardware description the OM6281 board has 8 jumper headers. ? port0: headers for port 0 i/o bits 0.0 through 0.7 ? port1: headers for port 1 i/o bits 1.0 through 1.7 ? port2: headers for port 2 i/o bits 2.0 through 2.7 ? port3: headers for port 3 i/o bits 3.0 through 3.7 ? port4: headers for port 4 i/o bits 4.0 through 4.7 ? ad0: address selector header. default is ad0 high (2-3) ? oe_select: output enable selector. default is oe low (5-6) ? 5v: v cc header ? gnd: ground header fig 1. OM6281 demo board address select port headers scl sda card extender connector int led pca9698 oe select pca9530 9-pin connector to i2c 2005-1 board
xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 6 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 6. schematics fig 2. OM6281 schematic (part 1 of 2) io0.1 io0.3 io0.5 io0.7 port 0 io0.0 io0.2 io0.4 io0.6 io1.1 io1.3 io1.5 io1.7 port 1 io1.0 io1.2 io1.4 io1.6 io2.1 io2.3 io2.5 io2.7 port 2 io2.0 io2.2 io2.4 io2.6 io3.1 io3.3 io3.5 io3.7 port 3 io3.0 io3.2 io3.4 io3.6 io4.1 io4.3 io4.5 io4.7 port 4 io4.0 io4.2 io4.4 io4.6 1 3 5 7 2 4 6 8 1 3 5 7 2 4 6 8 1 3 5 7 2 4 6 8 1 3 5 7 2 4 6 8 1 3 5 7 2 4 6 8 1 2 jp3 gnd 5 v unswitched led4 r9 led3 r8 led2 r7 led6 r12 5 v unswitched led5 r11 led1 r10 pin13 pin14 pin15 pin16 pin17 pin19 pin20 pin21 pin22 pin24 pin25 pin26 pin31 pin32 pin33 pin36 io1.0 io1.1 io1.2 io1.3 io1.4 io1.5 io1.6 io1.7 io2.0 io2.1 io2.2 io2.3 io2.4 io2.5 io2.6 io2.7 pin37 pin35 pin38 pin40 pin41 pin42 pin43 pin44 io3.0 io3.1 io3.2 io3.3 io3.4 io3.5 io3.6 io3.7 pin54 pin53 pin52 pin50 pin49 pin48 pin47 pin45 io4.7 io4.6 io4.5 io4.4 io4.3 io4.2 io4.1 io4.0 io0.4 io0.5 io0.6 io0.7 pin3 pin4 pin5 pin7 pin8 pin9 pin10 pin12 io0.0 io0.1 io0.2 io0.3 io0.4 io0.5 io0.6 io0.7 r14 r13 r15 led0 ld1 r1 pin18 vdd0 5 v unswitched pin46 vdd1 r2 gnd pwr c1 c2 gnd r3 r4 r5 r6 1 2 jp2 2 1 jp1 int sda scl pin1 pin2 sda scl reset pin56 reset oe pin30 oe int pin55 int ic1 gnd pin51 pin39 pin34 pin23 pin11 pin6 vss5 vss4 vss3 vss2 vss1 vss0 1 2 ad1 3 ad0 pin27 ad2 pin29 ad1 pin28 5 v unswitched r16 002aad33 9
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 7 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 fig 3. OM6281 schematic (part 2 of 2) pin1 pin5 reset pin6 pin7 5 v unswitched r17 gnd led10 6 4 2 sda scl reset a0 v dd gnd led1 ic2 sda scl pin2 led0 pin3 led1 led0 pin4 pin8 gnd c3 ps1 a ps2 b r18 led9 gnd c4 ic3 v cc ps5 gnd gnd ps3 ps4 y blnk_dim r19 74lvc1g38 gnd oe_select 5 3 1 oe 5 v unswitched 002aad38 3 us7 5 v unswitched 5 v switched 3.3 v unswitched 3.3 v switched scl gnd sda input output training board header us2 5 v unswitched 5 v switched 3.3 v unswitched 3.3 v switched scl gnd sda input output training board header
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 8 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 7. OM6281 demonstration board main components 8. pca9698 evaluation steps the pca9698 functions are controlled by win-i2cusb lite gui. refer to the pca9698 data sheet for additional information on the registers and functionality. 8.1 controlling leds using gpio output 1. connect the hardware as described in section 4 ? installation ? . the pca9698 address is set to 0x42. 2. start the gui software. 3. the main screen will appear. 4. from the ?device? drop-down menus select ?io expanders? and from the subsequent drop-down menu select ?pca9698 40-bit i/o expander?. 5. the device configuration scr een will be displayed as in figure 4 . 6. check the ?auto write? box on the right to send new register contents as soon as we change them. 7. select the bank0 tab. the default configuration is shown as in figure 5 . 8. to enable the outputs, click on the check box ioc0 in the ?configuration 0? register to enable the output on bit 0. an alternative is to write the hex value directly in the box. 9. the led connected to port0.0 is now on. 10. to turn it off, click on the op0 box to se t the output signal high. verify led0 is off. 11. additional leds are located at portx.0 on banks 1-4. an rgb led is located at port0.1 to port0.3. experiment by turning those leds on and off. table 1. OM6281 main components device description address location pca9698dgg 40-bit fm+ i 2 c-bus advanced i/o port with reset , oe , and int 0x42 ic1 pca9530dp 2-bit i 2 c-bus led blinker/dimmer 0xc2 ic2 74lvc1g38 2-input nand gate n/a ic3
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 9 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 fig 4. pca9698 device configuration screen fig 5. bank0 configuration
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 10 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 8.2 gpio input 8.2.1 polling mode in polling mode, the host controller must read the input port registers at predetermined intervals to check if an input has changed. depending on the application, the interrupt mode described in section 8.2.2 may be a more efficient method of verifying changes of state on the input pins. 1. select bank0 and verify that the default values are displayed. 2. since the pca9698 has a small pull-up on th e i/o, a read on the input port 0 register returns 0xff. 3. pull port0.7 to a logic low. 4. read the input port 0 register and verify that the input port 0 register reads 0x7f. 8.2.2 interrupt mode in interrupt mode the interrupt pin is toggled to signal the host controller when an input change of state has been detected. the interr upt mask register spec ifies which signal is allowed to generate an interrupt. 1. select bank1 and verify the default values are active. 2. un-check the msk7 and msk6 bits in the mask interrupt 1 register. 3. with the aid of an external pull-down, pull port1.6 and port1.7 bits to a logic low. 4. verify the int light is illuminated on the board. 5. toggle the msk6 and msk7 bits and verify the int light goes off only when both bits are masked. 6. read the input port 1 register and verify the contents is now 0x3f and the int light is off. 7. pull the io1.7 signal high and verify that the interrupt light is on. 8. toggle the msk6 bit and verify that the int light remains on. 9. read the input port 1 register and verify that the contents is 0xbf and the int light is off. 9. application specific: led blinking and dimming with the pca9530 and the pca9698 9.1 theory of operation the pca9698 has the capability to drive up to 40 leds (within certain power restrictions on the package, which can be overcome with the use of fets). to enhance the application of the pca9698, a pca9530 can be used to drive the output enable (oe ) pin to blink and dim the output of the leds. a pattern with intermediate complexity can be easily generated by combining the outputs of the pca9530. a 74lvc1g38gw nand gate is used to demonstrate the oe polarity inversion (active high instead of default ac tive low) of the pca9698.
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 11 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 to drive leds, the gpios on the pca9698 ar e configured to output mode. the leds are turned on and off by driving the outputs low and high. to blink and dim the leds, the oe pin is tied to the outputs of the pca9530 through a nand gate. when the oe is driven high, the outputs on the pca9 698 will be enabled. this will tu rn on the leds that are connected to outputs driven low. the truth table in ta b l e 2 illustrates the sequence. combining the blink and dimming, along with the individual on/off control of each led allows the user to create eye-catching display patterns. the example outlined in section 9.2 will demonstrate how to obtain the waveform shown in figure 6 . table 2. led control truth table led0 led1 oe gpio output led 0 0 1 low on 0 1 1 low on 1 0 1 low on 110lowoff fig 6. blinking and dimming pattern
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 12 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 9.2 blinking/dimming with the pca9530 demonstration steps the following exercise demonstrates how this is achieved. 1. move the oe_select jumper to the 3-4 position. the pca9530 will now control the oe pin. 2. set-up the hardware and software as described in section 4 ? installation ? . 3. open the pca9698 gui. 4. in the ?device configur ation? tab, select oe enable high. 5. select the bank0 tab. 6. enable the output for bits 1-3. these bits control the rgb led on the board. 7. the rgb led should be off. 8. go to the ?device? selection tab and select the ?led blinkers and dimmers? to select the pca9530. the configur ation screen will appear. see figure 7 . 9. select the ?auto-write? option. 10. slide the selection tab on led0 to the on position. 11. verify the rbg led is on, displaying white. 12. move the led0 slider to pwm0. 13. move the led0 period slider to 0.033 seconds and the led0 duty cycle to 14.45 %. 14. observe the pattern displayed on by the rgb led. 15. move the led1 period slider to 0.296 seconds and the led1 duty cycle to 12.11 %. 16. move the led1 slider to pwm1. 17. observe the pattern being output on the rgb led. 18. observe led 8 and led 9, which individual blink/dim patterns generated by the led0 and led1 outputs on the pca9530. 19. to change the color displayed by the rgb led, go back to the pca9698 bank0. 20. turn off the green led by selecting bit 2 high. 21. verify that the blink color is now mauve. 22. turn off the red led by selecting bit 1 high. 23. verify the blink color is now blue. 24. slide the period and duty cycle bars for the led1 and led0 and observe how the blink and dim patterns vary.
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 13 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 10. abbreviations fig 7. pca9530 configuration screen table 3. abbreviations acronym description fet field-effect transistor fm+ fast-mode plus gpio general purpose input/output gui graphical user interface i/o input/output i 2 c-bus inter integrated circuit bus ic integrated circuit led light-emitting diode pc personal computer ram random access memory rgb red/green/blue smbus system management bus usb universal serial bus
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 14 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 11. references [1] pca9698 data sheet ? nxp semiconductors [2] pca9530 data sheet ? nxp semiconductors [3] 74lvc1g38 data sheet ? nxp semiconductors [4] i 2 c 2005-1 user manual ? nxp semiconductors
um10267_1 ? nxp b.v. 2008. all rights reserved. user manual rev. 01 ? 24 september 2008 15 of 16 nxp semiconductors um10267 pca9698 demonstration board OM6281 12. legal information 12.1 definitions draft ? the document is a draft versi on 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 hav e no liability for the consequences of use of such information. 12.2 disclaimers general ? information in this document is believed to be accurate and reliable. however, nxp semiconductors d oes 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. 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 medical, military, aircraft, space or life support 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 purpos es only. nxp semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. 12.3 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. i 2 c-bus ? logo is a trademark of nxp b.v.
nxp semiconductors um10267 pca9698 demonstration board OM6281 ? nxp b.v. 2008. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please se nd an email to: salesaddresses@nxp.com date of release: 24 september 2008 document identifier: um10267_1 please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 13. contents 1 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 getting started . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1 assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.2 static handling requirements . . . . . . . . . . . . . . 3 3.3 minimum system requirements. . . . . . . . . . . . . 3 3.4 power requirements . . . . . . . . . . . . . . . . . . . . . 3 4 installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.1 i 2 c 2005-1 board and win-12cusb lite software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.2 OM6281 connection to i 2 c 2005-1 board . . . . . 4 5 hardware description . . . . . . . . . . . . . . . . . . . . 5 6 schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 OM6281 demonstration board main components . . . . . . . . . . . . . . . . . . . . . . . 8 8 pca9698 evaluation steps . . . . . . . . . . . . . . . . 8 8.1 controlling leds using gpio output . . . . . . . . 8 8.2 gpio input . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8.2.1 polling mode . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8.2.2 interrupt mode . . . . . . . . . . . . . . . . . . . . . . . . 10 9 application specific: led blinking and dimming with the pca9530 and the pca9698 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 9.1 theory of operation . . . . . . . . . . . . . . . . . . . . 10 9.2 blinking/dimming with the pca9530 demonstration steps . . . . . . . . . . . . . . . . . . . . 12 10 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 13 11 references . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 12 legal information. . . . . . . . . . . . . . . . . . . . . . . 15 12.1 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 12.2 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 12.3 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 15 13 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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