MicroVGA-TEXT Datasheet - Micro VGA: Cost
Contents
1. 80 V Voh Output high voltage 2 4 V Vol Output low voltage 0 4 V IkBp Keyboard current VCCKBD VCC unfused 200 mA Vesp Electrostatic Discharge ESD 2000 V Tdr Data retention 20 Years V TVBLANKING TV signal output blanking voltage 0 3 V VtvcoLor TV signal output color voltage 0 3 1 0 V Vvca VGA signal output voltage R G B 0 0 7 V Applies both to I O pins and VGA synchronization signals HSYNC VSYNC On Line Support Documentation is available at http Awww microvga com docs datasheets user manual application notes MicroVGA conio library and reference projects are available from http www microvga com conio lib2. F C O N S MicroVGA TEXT Datasheet http www microvga com page 4 10 VGA Pin Symbol Name l RED Red video component 2 GREEN Green video component 3 BLUE Blue video component 4 N C 5 GND Ground HSync 6 RED RTN Ground Red 7 GREEN RTN Ground Green 8 BLUE RTN Ground Blue 9 5V VDC 5V DC 10 GND Ground VSync 11 N C 12 SDA PC Data 13 HSYNC Horizontal Sync 14 VSYNC Horizontal Sync 15 SCL PC Clock PS 2 Keyboard MiniDIN6 Pin Symbol Name l DATA Data 2 N C 3 GND Ground 4 VCC 5V DC 5 CLK Clock 6 N C TV Output S Video MiniDIN 4 Pin Symbol Name 1 GND Ground Y 2 GND Ground C 3 Y Intensity Luminance 4 C Color Chrominance Note C signal is connected to GND in MicroVGA TEXT only Y 1s provided Female S E C O N S MicroVGA TEXT Datasheet http www microvga com page 5 10 TV Output S Video Cinch Pin Symbol Name l VIDEO Video Signal 2 GND Ground VIDEO Note Video signal contains only intensity Luminance information Part Numbers Product Ordering Codes Code Description UVGA TEXTI S MicroVGA Module with VGA HDF 15 S Video Mini DIN4 and keyboard connector Other variants are possible for high volume orders Typical applications Typical setup 142 asy xT AL s H Tala
3. holder S F C O N S MicroVGA TEXT Datasheet http www microvga com page 2 10 System description MicroVGA reads data from UART serial port or SPI interface and displays them on a VGA TV All keyboard activity is sent via UART or SPI TV VGA output selection MicroVGA displays on VGA port by default however MicroVGA automatically detects the presence of connection to a television or other S Video S VHS device Presence is detected by checking cable termination at television side 75O0hm When a television is connected VGA port is disabled and only S Video signal is generated Please note that television is detected even if turned off TV output may be disabled in MicroVGA setup PAL or NTSC mode selection is configurable using MicroVGA setup The TV output configuration is stored in a non volatile memory UART Bypass mode The UART interface for MicroVGA while the module is de asserted CS 1 1s directly wired to secondary UART This will allow the user to connect other devices onto the physical UART bus MicroVGA Communication MicroVGA reads data from UART port when CS 0 and displays them on a VGA TV All keyboard activity is sent via UART when CS 0 and CTS 0 Communication speed depends on MicroVGA settings Default value is 1 000 000 bits s 1 Mbit UART is always using 1 start bit 8 data bits no parity bit 1 stop bit 8N1 Available baud rates are 9600 19 200 38 400 57 600 115 200 500 00
4. 0 1 000 000 1 250 000 The baud rate configuration is stored in a non volatile memory and is configurable using built in setup program see MicroVGA TEXT user manual for more information ANSI Commands MicroVGA 1s controlled using VT100 compatible ANSI escape sequences More information can be found in MicroVGA TEXT User s Manual or MicroVGA conio library and demo projects Internal watchdog In case of internal error communication error or voltage drop MicroVGA contains internal watchdog which automatically resets MicroVGA The internal state cursor position color etc is retained SPI Signal Pin Description The SPI module is compatible with Motorola s SPI and SIOP interfaces Signal Data Output SO SO is used to transfer data serially out of the SPI device Data is shifted out on the falling edge of the serial clock Signal Data Input SD SI is used to transfer data serially into the SPI device Data instructions and addresses to be programmed are latched on the rising edge of the serial clock Serial Clock SCK SCLK is an input signal that provides the necessary timing for the serial interface Data are latched on the rising edge of SCLK while data present on the SO changes after the falling edge of SCLK Chip Select CS When CS is high the SPI device is deselected and SO is at high impedance When CS is low the SPI device is enabled and in the active power mode Chip ready RDY Wh
5. 4 4 pg RYD ac sr ae ALAL Pa INTO Ate P3 3 INT1 a Pa4 To z d pa ST 10 UY pa 11 1 2 14 14 15 16 17 14 19 The above diagram shows typical connection to a microcontroller Please note that MicroVGA TXD pin has to be connected to RXD of the microcontroller RXD to MCU TXD CTS to MCU RTS and RTS to MCU CTS Handshaking signals CTS RTS can be software emulated if no silicon support for UART handshaking is provided Test setup Micro VGA TEXT can be tested very easily It should start working immediately after connecting power supply to pins 1 and 2 of system connector GND 5V When power supply is applied and other pins are left unconnected MicroVGA header is displayed on TV or VGA port S F C O N S MicroVGA TEXT Datasheet http www microvga com page 6 10 VGA Timing VGA Mode is SVGA standard 800x600 60 Hz 37kHz horizontal and vertical synchronization is positive General timing Screen refresh rate 60 Hz Vertical refresh 37 8 kHz Pixel freq 40 0 MHz Horizontal timing line Scanline part Pixels Time us Visible area 800 20 Front porch 40 l Sync pulse 128 J2 Back porch 88 22 Whole line 1056 26 4 Vertical timing frame Frame part Lines Time ms Visible area 600 15 84 Front porch 1 0 0264 Sync pulse 4 0 1056 Back porch 23 0 6072 Whole frame 628 16 5792 S F C O N S MicroVGA TEXT Datash
6. Porch time US Nunes Number of lines per frame 262 lines Nv mes Video lines 4 229 lines PS 2 Keyboard Timing Symbol Parameter Typ value Units Terk Clock 1 17 kHz S F C O N S MicroVGA TEXT Datasheet http www microvga com page 8 10 SPI Communication Diagram Aa goes inactive after first SCK pulse l RLF o SCK SD0 SDI Input S F C O N S MicroVGA TEXT Datasheet http www microvga com page 9 10 Mechanical Dimensions DU fant a vaN Dimension Description Value in Value mm A Module height 1 380 35 052 B Module width 2 500 63 500 al Mounting hole distance 0 115 2 921 a2 Mounting holes 0 680 17 270 a3 Mounting hole distance 0 585 14 859 a4 System connector drill position 0 095 2 413 b1 b4 Mounting hole distance 0 125 3 175 b2 b3 Mounting hole to mid of connector 1 437 36 437 RI Mounting hole diameter 0 118 3 000 R2 System conn drill diameter 0 0138 0 350 System connector pitch 0 100 2 54 A al a2 a3 B b1 b2 b3 b4 S F C O N S MicroVGA TEXT Datasheet http www microvga com page 10 10 Electrical Characteristics Symbol Parameter Min Max Typ Units VCC Supply voltage 4 5 5 5 5 0 V VCC33 3 3V Output d 3 4 V IMAx33 3 3V Ouput max current output 400 mA Vih Low level input voltage 2 0 5 5 V Vil High level input voltage 0 0
7. S F C O N S MicroVGA TEXT Datasheet http www microvga com page 10 MicroVGA Device Overview MicroVGA is low cost Microcontroller to VGA interface providing 80x25 16 color text mode physical resolution is 800x600 at 60 Hz MicroVGA is connected to a MCU via 2 or 4 wire RS 232 TTL or LVCMOS compatible interface Display is controlled using ANSI terminal codes such as cursor movement colors etc In addition to VGA output the interface provides 3 E also NTSC PAL signal output for television z i viewing and PS 2 keyboard input This makes the wa NS LJ iii Soy ELL KIER i MicroVGA an ideal solution for user interface in ei ECECOITILeL embedded applications The MicroVGA is a complete user interface module 3 in 1 functions MicroVGA can be connected to any MCU with UART such as Microchip PIC including PICmicro PIC16 and dsPIC33 Atmel ATmega 8051 ARM MIPS or even PowerPC Key features Provides 80x25 color text mode microcontroller using only 2 wires minimum SVGA output 800x600 60Hz resolution font 4 recommended for handshaking 22x10 Very easy to use works like standard ANSI or S Video television output PAL font 11x10 VT100 terminal S Video television output NTSC font 9x10 e 6 supported character sets US ASCII and Automatic selection of TV or VGA output ISO8859 1 through ISO8859 5 with full PS 2 keyboard input MiniDIN 6 internationalization support Easy connection to almost
8. eet http www microvga com page 7 10 TV PAL Timing PAL TV output signal is non interlaced progressive B G PAL One of the advantages of a non interlaced mode is that it is flicker free Since all fields and their scan lines get drawn on the same location there is no interlace flicker The image is very stable and clear compared to standard interlaced mode Symbol Parameter Typ value Units TERAME Frame time 19 9 ms TUNE Nominal line period 64 US TLONGSYNC Long sync time 30 US TsHorRTSYNC Short sync time US Tsync Normal sync time US TBACKPORCH Back Porch time US Nimes Number of lines per frame 625 lines NVYLINES Video lines 6 309 lines PAL mode is configured by default and is preferred over NTSC if possible TVINTSC Timing NTSC TV output signal is non interlaced progressive NTSC Like in PAL mode one of the advantages of a non interlaced mode is that it is flicker free Please note that NTSC mode has limited number of visible scan lines so quality of image is worse compared to PAL Most of the modern American televisions are capable of displaying European PAL signal so it s recommended to use PAL mode whenever possible Symbol Parameter Typ value Units TFRAME Frame time 16 6833 ms Time Nominal line period 63 5 US TLonesync Long sync time us TsHorTSYNC Short sync time us Tsync Normal sync time US TBACKPORCH Back
9. en RDY is low MicroVGA 1s ready for SPI communication S F O N S MicroVGA TEXT Datasheet http www microvga com page 3 10 Pinouts In addition to connectors specified below MicroVGA also has system setup pad When this pad is short circuited the built in setup tool is invoked System connector Pin Signal Direction Description l GND Ground 2 5V 5V input 3 3 V3 3 3V regulated output 4 CS IN Chip select 5 RXD IN UART Receive data to be displayed on monitor SCK SPI mode clock 6 TXD OUT UART Transmit keyboard output RDY SPI mode MicroVGA ready signal active low 7 RTS OUT UART Request to send signal active low SO SPI mode master in slave out 8 CTS IN UART Clear to send signal active low SI SPI mode master out slave in 9 INT OUT Reserved for future use do not connect 10 SYSRQ OUT System Request output SysRq key open drain 11 RXD2 OUT UART bypass mode RxD PIN 12 TXD2 IN UART bypass mode TxD PIN 13 RESET IN Reset signal 14 NC Not connected reserved for future use 15 NC Not connected reserved for future use 16 NC Not connected reserved for future use 17 NC Not connected reserved for future use 18 NC Not connected reserved for future use 19 NC Not connected reserved for future use 20 NC Not connected reserved for future use SYSRQ is open drain output pull up resistor is required S
10. every Table of Contents UART Bypass Mod ae ere eer 2 ae NI re eee tc 6 MicroVGA Communication c cccceceeseseeees Z General timing secsecsecsscsscsscssssssssscecess 6 ANSI Commands eenean 2 Horizontal timine line aa 6 VOD meee er me trae eee eee rer er eae 4 SPI Communication Diagram osecas 8 PS 2 Keyboard MiniDIN6 sees 4 Mechanical Dimensions ERE Er 9 MADE IN THE EU Copyright 2008 2009 SECONS s r o http www secons com Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates It is your responsibility to ensure that your application meets with your specifications No representation or warranty is given and no liability is assumed by SECONS s r o with respect to the accuracy or use of such information or infringement of patents or other intellectual property rights arising from such use or otherwise Use of SECONS products as critical components in life support systems is not authorized except with express written approval by SECONS No licenses are conveyed implicitly or otherwise under any intellectual property rights Neither the whole nor any part of the information contained in RO H S Compliant or the product described in this manual may be adapted or reproduced in any material or electronic form without the prior written consent of the copyright
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