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?2004-2006 copyright by averlogic technologies, corp. 1 al240c-evb-a1 evaluation board user manual version 0.8 document number: 1-m-pae141-0001
?2004-2006 copyright by averlogic technologies, corp. 2 amendments jan. 25, 2005 preliminary version a0.1 feb. 01, 2005 preliminary version a0.2 1. update evaluation kit setup mar. 29, 2005 preliminary version a0.3 1. revise component input y0/y1 2. update evaluation kit setup apr. 21, 2005 preliminary version a0.4 1. update evaluation kit setup 2. add a table for function indicator leds apr. 29, 2005 preliminary version a0.5 1. add software section oct. 17, 2005 preliminary version a0.6 1. update evaluation kit setup 2. add a table for function binary switch. 3. add a table for function dip switch. 4. add a table for special function definition of push buttons nov. 23, 2005 preliminary version 0.7 1. update title and version number 2. update contact information feb, 14, 2006 preliminary version 0.8 1. remove the development tool and its gui. 2. add 2.4 section for description of ad hoc setup.
?2004-2006 copyright by averlogic technologies, corp. 3 table of contents 1. introduction ............................................................................................................................... ....... 4 1.1. introduction ........................................................................................................................ 4 1.2. product overview ............................................................................................................. 4 2. hardware section ........................................................................................................................... 5 2.1. evaluation kit contents & requirement .................................................................. 5 2.2. evaluation kit configuration ........................................................................................ 5 2.3. evaluation kit setup ....................................................................................................... 7 2.4. ad hoc setup ..................................................................................................................... 8
?2004-2006 copyright by averlogic technologies, corp. 4 1. introduction 1.1. introduction this al240 evaluation kit is specially designed for evaluating the al240 adaptive low power video decoder. the evaluation kit allows maximum flexibility for optimizing various input and output modes for specific applications. using the hardware and software provided in the evaluation kit, standalone and pc-based mode can be demonstrated. in addition, there are many new functions that hardware and software provide in this edition. 1. binary switch 2. fast channel switch 3. close caption vbi detect and display 1.2. product overview al240 adaptive low power video decoder the al240 is silicon efficient, cost effective high video quality ntsc/pal secam video decoder with high quality y/c separation process. the al240 decode ntsc/pal secam composite video or s-video and convert it into yuv 4:2:2, 8-bit itu 656 digital video output. employing adaptive filter technology, the al240 is able to provide a clear y/c separated signals while maintaining excellent frequency response. the result is sharp, high detail video that eliminates unwanted dot crawl and false color effects. fully programmable video characteristic control, such as hue, contrast, brightness, saturation, are supported. the al240 decoder incorporates an advanced vertical blanking interval (vbi) data processor to do data slicing, parsing and decoding teltext, closed caption, and other formats. two wires of fast channel switching input allow decoder to do an instant alternation of analog cvbs input from one to the other. up to 4 serial bus addresses can be selected via 2 configuration pins that allows multiple al240 chips on the design without extra logic. the al240 operates under the low power voltages (3.3v and 1,8v) with 44-pin lead free (pbf) qfp package.
?2004-2006 copyright by averlogic technologies, corp. 5 2. hardware section 2.1. evaluation kit contents & requirement the evaluation kit includes all of the specific software and hardware required to evaluate the al242. included in the evaluation kit are: al240 evaluation board x 1 12v/1a power adapter x 1 power core x 1 video connection cables x 3 (cvbs, s-video & component) evb user manual rs232 cable x 1 (by request) 2.2. evaluation kit configuration the al240 evb consists of the al242 video decoder, tv encoder, 8051 mcu and other components. the al240 accepts four cvbs (composite) or two s-video (y/c) inputs with adaptive comb filter quality. the video encoder outputs cvbs, s-video or component (ypbpr) for tv display. by using an 8051 mcu, this evaluation board can be operated in standalone mode without connecting to pc.. the default dip switch and binary switch settings should be set as ?off? and ?0?as shown in figure 1. averlogic recommends that the default settings be used initially to bring up the evaluation board. the locations and descriptions of jack connectors and push buttons are also shown in figure 1.
?2004-2006 copyright by averlogic technologies, corp. 6 figure 1. front side of evaluation board figure 2. front side of evaluation kit mcu leds d1~4 s-video-0 s-video-1 s-video p r pb / cvbs y extension connector output ports power dc-12v jack power on/off switch jp1 on al240 bw 1 bw 2 key 1 key2 key 3 key 4 d4 d1 cvbs-2 push buttons key1~4 reset button rs232 port dip switch cvbs-0 / y0 i nput ports binary switch bw1, bw2 cvbs-3 cvbs-1
?2004-2006 copyright by averlogic technologies, corp. 7 2.3. evaluation kit setup 1. verify that all of the switches of dip switch (sw1~4) are at ?off? position. sw1~2 are set the default slave address. sw3~4 are set the input source when system enter fast channel switch mode. the function definition of dip switch shown in table 1. 2. verify that all of the switches of binary switch (bw1~2) are at ?0? position. 3. connect the video cable of required input source to input ports. (the default input source is cvbs-0.) 4. verify video system. (the default is auto-detection for ntsc or pal-i video system.) 5. connect s-video (recommend) or cvbs cable from the output ports of al242 evb to a tv display. (the default output mode is s-video/cvbs.) 6. verify power supply cable is connected to the power dc-12v jack. 7. turn on the power on/off switch. 8. the evb will go into default operating mode. power indicator leds (d10 & d11) will be illuminated red. function indicator leds (d1~d4) will be illuminated green for ntsc. the descriptions of function indicator leds are shown in table 2. 9. if the input video system is other than ntsc or pal-i, or the evb cannot output correct video in any case, many default settings can be loaded through changing the settings of bw1~2. rotate binary switch to the proper position and press ?reset? button, the system will enter manual-setting mode. using the function definition of binary switch in table 3, the flexible combinations can be evaluated.
?2004-2006 copyright by averlogic technologies, corp. 8 10. after pressing any push button at any time, the system enters manual-setting mode. using the function definition of push buttons and leds shown in table 4, the flexible combinations can be evaluated. all push buttons key1 to key4 must be set to enter the right settings. 11. use the special function definition of push buttons shown in table 5, the system will enter the proper mode according to the button pushed. 12. how to enter vcr mode? i. under the state of power off (1) press push button (key1~key4) then turn on the power. (2) release push button, the system will enter vcr mode. ii. under the state of power on (1) press push button (key1~key4) then press reset button. (2) release push button, the system will enter vcr mode. 13. use the pc programming utility, more evb functions can be evaluated. 2.4. ad hoc setup 1. how to use fast channel switch? i. manual mode (1) rotate binary switch bw1 to fast channel switch mode and turn on the power. (2) using dip switch sw3~4 to select the input source between cvbs-0~cvbs-3. ii. auto mode (1) verify that dip switch sw3~4 are at ?off? position. (2) verify that binary switch bw1 is at ?0? position.
?2004-2006 copyright by averlogic technologies, corp. 9 (3) press key3 and key4 at the same time, system will enter auto fast channel switch mode. once the system enter auto fast channel switch mode, input source will be switched continuously between cvbs-0~cvbs-3. (the function definition of dip switch and binary switch are shown in table 1 and table3.) sw1/sw2 slave id setting reference sw1 sw2 slave address off off 0x2a on off 0x28 off on 0x26 on on 0x24 sw3/sw4 input source reference for fast channel switch sw3 sw4 input source on on cvbs-0 off on cvbs-1 on off cvbs-2 off off cvbs-3 table 1. the function definition of dip switch at manual-setting mode. d1 d2 d3 d4 description on on on on ntsc on on on off ntsc-443 on on off on pal on on off off pal-m on off on on pal-n on off on off secam on off off on pal-cn table 2. the descriptions of function indicator leds at default operating mode.
?2004-2006 copyright by averlogic technologies, corp. 10 binary switch number bw1 (video input source) bw2 (video input mode) 0 cvbs-0 auto-detection (ntsc&pal-i) 1 s-video-0 auto-detection (7 standard) 2 na ntsc 3 cvbs-1 ntsc_443 4 cvbs-2 pal_i 5 cvbs-3 pal_m 6 s-video-1 pal_n 7 fast channel switch mode secam 8 pal_cn table 3. the function definition of binary switch at manual-setting mode. d4 d3 d2 d1 description key1 cvbs-0 s-video-0 component na video input select key2 cvbs s-video component test pattern video output select ntsc-3.58 (d4) ntsc-4.43 (d3) pal (bdghi) (d2) pal-m (d1) key3 pal-n (d3+d4) secam (d1+d2) pal-cn (d2+d4) video system select key4 enter key table 4. the function definition of push buttons and leds at manual- setting mode. d1~d4: led1~led4 key-1~4: push button 1~4 (do not need to set again the push buttons key1 to key4 when changing to another configuration. for example, you can only push key 2 to change the output mode.) key1 key2 key3 key4 vbi mode debug mode auto fast channel switch mode table 5. the special function definition of push buttons at manual- setting mode.
?2004-2006 copyright by averlogic technologies, corp. 11 contact information averlogic technologies corp. url: http://www.averlogic.com.tw

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