**** FILE 74com.txt ****

This document gives the commmon hardware setup
for using an Epson SDU1374B0C evaluation board 
on a ISA bus PC, under windows, to demonstrate
various Kyocera color LCD modules.  You obtain
this board from Epson.  The KK5 interface
boards and the various cables are parts of a
Kyocera kit.  The color LCD modules are
available as products of Kyocera.  

A series of experiments were run at Kyocera to 
record the Epson SED1374 controller IC register 
settings during successful operation of various
Kyocera LCD modules.  The information in this
document is common to all these experiments. 

Each experiment has a specific document giving
specific setup information for that LCD module
and recording the resulting SED1374 register
settings.  These settings make minimum use of
SED1374 features and maximum use of supporting
features on the KK5 interface boards.  The idea
was to simply make the Kyocera LCD operate and
record the register settings as a starting point.  
Afterwards, people designing products can begin 
using on-chip features such as MOD in place of 
the features on the KK5 boards.    

KEY POINTS
  Adjust the VDDH variable resistor as high as
    possible - all the way clockwise.  
  Set jumper JP4 for the logic voltage of 
    the LCD.  

SDU1374BOC BOARD SWITCHES AND JUMPERS
  On the 6 position dip switch: 
      1,2,3 open
      4,5,6 closed.

  JP1 1-2 (upper position)
  JP2 1-2 (upper position)
  JP3 1-2 (upper position)
  JP4 x-x LCD logic voltage selection.
    1-2 (upper) provides 5.0V LCD logic for 5.7".
    2-3 (lower) provides 3.3V LCD logic and for
          most other panels.  Check KC specs.
    
  VLCD variable resistor is irrelvant to Kyocera LCDs.
  
  VDDH variable resistor must be turned as far as
    possible clockwise to provide maximum LCD 
    voltage to the similar variable resistor "VOL1"
    on the Kyocera KK5 board, where actual adjustment
    is more convenmient.
  
   U2 socket contains a 25.000000 Mhz crystal
   U7 socket contains a device with a white paper 
         label "SDU1374BOC Rev 1.0"
       
CONNECTIONS
  Power-off.
  Connect a 40 pin ribbon cable to the board.
    (an standard IDE cable works fine).
  Connect the other end to the Kyocera KK-5
     board that you will be using, with
     display switch off and connect the LCD
     to the KK5 board.  
  Set the SDU board jumpers/switches as above.
  Insert the SDU board in the ISA slot.
  Power-on.

KK5 BOARDS
  Consult the Kyocera demonstration kit manual,
     page 4-1, for a table of what KK-5 boards
     to use with what LCD modules.
  Note that all KK-5 boards are assumed to be
     for the Epson boards.  The difference is that 
     they must have the 40 pin connector on top,
     and not the 30 pin connector in the middle,
     as found on otherwise similar KK5 boards 
     intended for Kyocera demo controllers.
  All KK-5 boards have dip switches 2 and 5 on,
     others off to set a typical randomizing 
     frequency, generated on the KK-5 board.  
     The SED1374 also has this capability, but 
     it was not tested here.

REFERENCES
  Epson web site is www.erd.epson.com.
    It has up to date versions of the Epson manuals.
    There are separate manuals for the SDU1374BOC
    eval board, the SED1374 controller IC, and the
    various software programs. 
  The Kyocera LCD website is www.kyocera.com/lcd
     It has specifications for most LCD modules.
     Consult these specs for logic voltage,
     frame rate range, and pixel clock range,
     which you must set by jumper or configuration
     program.
     
     Consult these specs for required additional
     circuits such as "randomizing circuit"
     and bias voltage circuit.  If additional
     circuits are required by an LCD, then they 
     will be provided for demonstration on the
     KK5 interface board.  But the customer must
     provide them externally the final product.
     The MOD feature of the SED1374 IC can
     implement the requirement for a randomizing
     frequency, if you load its register properly.

1374CFG.exe
  This program is used to configure 1374BMP.exe
  for a specific LCD panel.  Then 1374BMP.exe
  is run to set the SED1374 registers and
  display the .bmp image you select.  Kyocera 
  has lots of LCDs, so I made lots of copies
  of 1374BMP.exe and renamed one for each
  specific LCD.  For example 74B-38.exe is
  a copy of 1374BMP.exe configured for Kyocera
  3.8 inch panels.

  There is no option for single/dual because the
  SED1374 IC only supports single.  640x480
  is not a realistic format, because the
  40K memory would limit it to monochrome.

  The first 9 rows of Kyocera's table 4-1 give
  settings that affect the signalling, so they
  must be set exactly by 1374CFG.  After that,
  you want the panel clock and the frame rate to
  be withing their ranges, as given in the Kyocera
  spec for the specific panel.  You probably want
  Non-Display-Period lines to be 1 or 2 or a small
  number.  Finally you will be forced to choose
  a Non-Display-Period number of pixels acceptable
  to 1374CFG.exe.  As you enter one number, the 
  program will change some other number that you
  already set, in order to be maintain the 
  relationship among the frame rate, pixel clock,
  and non-display periods.  Repeat this until
  all values are acceptable.

  1374CFG requires a default color depth, in bits
  per pixel.  Choose whatever makes it happy, 
  because 1374BMP will change the SDU board to 
  the actual color depth of the file that you
  are trying to display.

  I abbreviate 1374BMP.exe as 74B-xxxx.exe,
  where xxxx identifies a Kyocera LCD.

DISPLAYING AN IMAGE.
  Execute the MS-DOS program from the windows
  program menu.
  Enter CD /1374  or  CD (whatever) to get
  into the directory.
  Run the 1374BMP program that you configured.

  for example

       C:\1374>74B-38  FL4-2432.bmp

  or 
       C:\1374>74B-38  BL4-3224.bmp /P

  The /P switch causes the image to be rotated
  90 degrees.  To avoid inconsistancies in the
  Epson software, never check the box for
  "portrait" and treat the /P switch as a 
  rotate switch.


PRINTING OUT REGISTER SETTINGS
   Within MS-DOS as above, enter:

          C:\1374>1374PLAY

      The program displays "=" as a prompt.
      At =, enter XA to display all the registers.
      At =, enter Q  to quit.
   Practice this until you can do it 
   without looking at the screen.
   Then run the program with MS-DOS 
      "I/O redirection".  The screen contents
      will go into the file, whose name you
      give each time.  For example:

          C:1374>1374play >test1.txt

   Accurately type in XA and Q as above,
      without the prompt.
      After Q, the MS-DOS prompt will re-appear.

   The file test1.txt will contain the 
      register settings, for use by engineers.
   You can quickly see its contents by entering

        C:\1374>type test1.txt

   I have made a set of register record files,
      to document each version of 1374BMP, for
      each Kyocera LCD module that I tested.
      For example 74B-389.txt records the
      the registers and my notes from running
      74B-38.exe /P


To get out of MS-DOS, enter

         C:1374>exit

Robert Joslyn
3/23/01
Kyocera Industrial Ceramics Corp.
360-992-1859
bob.joslyn@kyocera.com