



         SVID EVAL KIT SPEC SHEET  V2.20    (c)2002 MVS








INTRODUCTION
------------

The SVID Single-chip Video Controllers feature low cost and low power.  No
external memory chips are required because internal SRAM and EEPROM are
used for display memory.  High speed serial and parallel interfaces are
built in.  Talking to PIC, STAMP, Z80, AVR, x86, or any other micro that
has a few pins to spare is easy.  Since memory is non-volatile and the SVID
operates with or without a micro it's perfect for stand-alone displays.

Applications include "smart home" systems, factory status panels, lab
instrument readouts, vu-meters, portable sales terminals, etc..  The NTSC
version will drive a TV, VCR, or any other composite display.  The new 4-6"
composite type LCD panels are compact, low power, and inexpensive.  CRT and
LCD monitors (15",17",21" etc.) can be driven by the VGA version.

Four versions are available:

  SVID-cn   Character-Generator, NTSC out (TV, VCR,composite LCD)
  SVID-cv   Character-Generator, VGA out (15khz CRT or LCD monitor)
  SVID-gn   Graphic mode,        NTSC out
  SVID-gv   Graphic mode,        VGA out

In CG Mode 48 digits (8x6) are displayed from RAM with sixteen 5x7
character font tables held in EE.  Graphics Mode has 32x22 pixels total
with 32x6 bitmapped from RAM and the rest (32x16) from EE.  Both RAM and EE
memory can be updated by the user via the Serial/Parallel Interface.

CCC1a-r is a demo board for the SVID with PLUG-N-GO which means it can be
connected to a PC and works right away.  No cables to build or power
supplies to buy! The SVID is intended for lo-res applications and
educational use in the area of embedded controllers.  For hi-res
applications there's the MVSVGA2, a 640x480 VGA controller that drives 
color LCD and CRT VGA monitors.  Visit the website for details.








TRIAL RUN
---------

To test the SVID wire as shown below.  When power is applied the LED blinks
and a test pattern is displayed.  SPITERM.COM is a program which uses the
PC printer port to talk to the SVID via synchronous serial.  To try this
wire the PC printer port to SCLK, SDAT, and SBSY and then run SPITERM. 
Display bytes are sent to the SVID in pairs: address then data.  Sending
'A' (0x41) and '0' (0x30) will put the '0' byte in the second RAM position. 
Exit with ALT-X.  Source code is included for educational use.








HARDWARE
--------

Minimum components needed are a 16mhz crystal wired between pins 4 and 5
with two 47pf caps to ground.  These should be physically located close to
the chip (.4") for stable operation.

A 5v DC supply or 3 alkaline cells are typical sources of power.  When
powered from batteries the chip draws virtually no current when "off" yet
internal RAM retains data.  The chip can be powered down by grounding the
OFFL pin and powered up again by momentarily grounding ONL (note: if using
pin 1 put a .01mfd to GND).

CRT and LCD monitors are driven directly from the VGA version as follows:

VGA WIRING
----------
     monitor(db15h)        svid
    hor sync      13 ----- 7 HOR 
    green          2 ----- 8 VID 
    vert sync     14 ----- 9 VER 
    ground         5 ---- 10 GND 




Generating composite from the NTSC version requires 3 resistors: 100ohm
with one end on ground and the other end to a 1.2k and a 560ohm.  The
560ohm goes to pin 8, the 1.2k goes to pin 9.  Signal is across the 100ohm.








DC CHARACTERISTICS
------------------

TA=25C, VCC=5.0V, tCLCL=62.5ns(16mhz) unless otherwise noted

Under steady state (non-transient) conditions, IOL must be externally limited:
 Maximum IOL per pin: 20mA
 Maximum total IOL for all output pins: 80mA
 If IOL exceeds the test condition, VOL may exceed the related specification.
 Pins are not guaranteed to sink current greater than the listed test
 conditions.

Minimum VCC for Power Down is 2V.

Value tested to 45C

Symbol Parameter          Conditions              Min    Typ    Max     Units
VIL  Input Low Voltage                            -0.2   .2   VCC-0.1    V
VIH  Input High Voltage (Except XTLIN, RESET)    .2    VCC+.9 VCC+.5     V
VIH1 Input High Voltage (XTLIN, RESET)           0.7     VCC  VCC+.5     V
VOL  Output Low Voltage  IIL=25mA VCC=5V                       0.5       V
VOH  Output High Voltage IOH=3mA VCC=5V          VCC-.5                  V
IOH  Output Source Current VCC=5V VOH=4.5V                4              mA
IIL  Output Sink Current VCC=5V VOL=0.5V                  28             mA
RRST Reset Pull-Up Resistor                       100          500      kohm
Other Pin Pull-Up Resistor                         35          120      kohm
External Clock Drive

tSPH  SCLK pulse hi time                            1      2      3.25    us
tSPL  SCLK pulse lo time                            1      2      3.25    us
tPPH  PCLK pulse hi time                            1      2      25      us
tPPL  PCLK pulse lo time                            1      2      25      us
EE Endurance: 100,000 Write/Erase Cycles

Symbol Parameter                         VCC=2.7V          VCC=7.0V     Units
                                         Min Max            Min Max
1/tCLCL Oscillator Frequency              0   4              0  16       MHz
tCLCL Clock Period                       250               62.5          ns
tCHCX High Time                           40               16.7          ns
tCLCX Low Time                            40               16.7          ns
tCLCH Rise Time                              10                 4.15     ns
tCHCL Fall Time                              10                 4.15     ns








LIMITED WARRANTY 
----------------

MVS repairs free of charge products suffering from manufacturing defects
for a period of 5 years.  This will be done only if it has been determined
by MVS that the product has not been misused (improper voltages, physical
alteration, etc.).  Otherwise a minimum service charge is required.  In
either case it is necessary to contact MVS with invoice handy for a
Returned Merchandise Authorization (RMA) number before shipping the unit.

MVS assumes no responsibility for damage or other loss resulting from use
of this product or modifications associated with it.  The design is
proprietary and protected under federal and international copyright laws. 
Manufacturing licenses are available from MVS in addition to significant
OEM discounts.  Contact the company for more information.

