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.