Evaluation Board ADV7194 Digital Video Encoder Eval-ADV7194EB Thi

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Evaluation Board ADV7194 Digital Video Encoder Eval-ADV7194EB Thi

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FEATURES On-Board Reference On-Board Clock External Pixel Data Input YPrPb Input ADuC812 Microconverter Switch Control Direct Hook-Up Printer Port Software Control ADV7194 modes INTRODUCTION
Evaluation Board ADV7194 Digital Video Encoder Eval-ADV7194EB
This Application Note describes ADV7194EB evaluation board which supports ADV7194 Digital Video Encoder. device accepts CCIR601 data converts into analog Compos-
ite, Y/C, video signals NTSC format. Full data ADV7194 available ADV7194 data sheet, available from Analog Devices should consulted conjunction with this note when using Evaluation Board.
REQUIREMENTS ADV7194 requires power supply which able deliver minimum 3.3V. Ideal operating voltage ADV7194EB Current requirements approx. software which supplied with ADV7194 necessary connect printer port LPT1 boards 36pin
GENERAL DESCRIPTION
Centronics connector. order software operating system needs Windows Windows system requirements Pentium PMMx Pentium
ADV7194EB provides 25-pin input port over which pixel data CCIR601 format input. Test pattern generators providing these standards Tektronix TSG601 handheld signal generator Tektronix TPG20. input pixel data converted from level level MC10125TTLs. also possible input data 16-Bit 20Bit format progressive scan YPrPb format using P14, P16. different clock source that provided pixel data required, ADV7194EB features 27Mhz Oscillator (Y1) which connected over jumper ADV7194 contains internal which synchronizes 27MHz operation with operation. IC570 (U10) should used external required. on-board push-buttons provide control over SCRESET/RTC/TR RESET pin.
According setttings Mode Register whenever pressed, timing reset SCreset applied. When RESET (PB1) pressed internal registers ADV7194 reset default register settings (see following page). ADV7194EB also features external Voltage Reference (U19) which provides 1.235V Output Voltage. outputs AD847 buffer opamp (U1-U6) followed passive low-pass filter before being output over connection. outputs directly accessed test points T1-T6. ADV7194EB fitted with ADuC812 Microconverter. With supplied ADV7194 software, there additional 8051 .asm Code. This code contains demo settings ADV7194. According switch setting individual demos displayed. ADuC812 optional required make full ADV7194EB.
Technology Way, P.O. 9105, Norwood. 02052-9105, U.S.A. Tel: 517/329-4700
Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties which result from use. license granted implication otherwise under patent patent rights Analog Devices.
Eval-ADV7194EB
REGISTER SETTINGS POWER-UP RESET After pressing reset button evaluation board, register settings ADV7194 will follows: NTSC Video Standard. 2xOversampling Mode Disabled: MR2: Sleep Mode Control,- Pixel Data Valid, Standard I2C, Square Pixel, SCART MR3: Closed Captioning, Request, Teletext, MR4: Color Bars, VSYNC_3H MR5: CLAMP, Sync, Y-Level Control MR7: Sharpness Filter, Brightness Control, Adjust, Luma Saturation, Color Control MR8: Gamma Control, DNR, Double Buffering, Progressive Scan input, 10-Bit input MR9: Undershoot Limiter OCR:CLKOUT Enabled: MR2: Pedestal, MR4: Burst, Chrominance, MR6: PLL, Power-Up Sleep Mode, Output Configuration: CVBS LUMA CHROMA Timing Mode Slave, Blank Disabled Interlaced Mode, active pixel line duration, normal operating mode genlock), default levels, input, Out, 8-bit Pixel Port, Chroma Delay Subcarrier Subcarrier Subcarrier Subcarrier Frequency Frequency Frequency Frequency Register Register Register Register following register settings will correspond above settings: SFR0 SFR1 SFR2 SFR3 00hex 07hex 08hex 00hex 00hex 00hex 00hex 00hex 00hex 00hex 72hex 08hex 00hex CBhex 8Ahex 09hex 2Ahex 00hex
other registers 00hex After powering ADV7194EB hardware reset should applied (PB1).
Eval-ADV7194EB
EVALUATION SOFTWARE order give user complete control over ADV7194, computer program supplied with board. Setting Insert DISK into floppy drive double click SETUP.EXE will prompted other necessary information. Running Software: Double clicking ADV7194 icon will software evaluation board. Initialisation: After starting software will asked load preset. familiar with software recommended o.k. this message. will have ADV7194 immediately configured such that will output color signal when output connected NTSC monitor. this configuration necessary provide input signal because internal color bars enabled. register settings this preset checked clicking READ REGISTERS main window. Otherwise recommended consult datasheet information about each control.
IMPORTANT THINGS KNOW:
Validity Settings: evaluation software automatically check acknowledge when register changed automatically read-back value stored that register. ACKcheck function Options menu. Continuous Read function enabled Register Access menu. Compatible Programming: This version software does take into account ability ADV7194 accept continuous streams data. Instead, every register write read, completely re-initiates start sequence (see ADV7194 Data sheet information different ways registers written to). This means that more information written port extending time required program ADV7194.This, while being valid writing ADV7194 optimum method writing ADV7194. Dynamically Linked Menu System: menues this software interactive, when (for example) change value register switch settings relevant that register change will automatically change correct state, inverse also correct.
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LINK HEADERS ADV7194 LINKS
These links used operating ADV7194 encoder: Ground link Link clock signal header Ground link Link Pull-Down Resistors (2K2) 8/10-bit pixel input Ground. Clock Mode J8A: ADV7194 clocked from onboard 27Mhz clock. ADV7194 clocked from clock contained pixel input. Link BLANK Ground. This allows control over BLANK functionality over software. unconnected BLANK disabled permanently software control BLANK functionality. Link PAL_NTSC Ground. Inserting this jumper will configure ADV7194 NTSC mode regardless settings Mode Register settings Mode Register however override this (Standard Control). Timing Reset SCReset J22A: J22B: SCRESET/RTC/TR configured Timing Reset. SCRESET/RTC configured subcarrier phase reset input input pin, according settings Mode Register When Mode Register configured Subcarrier Reset mode, will initiate Subcarrier Phase reset Subcarrier Phase will reset Field start next Field.
(IC570) used external alternative internal PLL). J12A provides 27Mhz input clock provides 54Mhz clock ADV7194. Link clock signal CLKIN ADV7194 bypass external circuitry. Link ALSB Ground. This jumper should inserted when ALSB chosen low.
Eval-ADV7194EB
MICROCONVERTER ADuC812 LINKS
These links required conjunction with ADuC812 Microconverter: Link Vertical Sync signals Interrrupt. J11A: vertical sync signal initiates interrrupt. J11B: vertical sync signal VSYNC initiates interrupt. Link Horizontal Sync signal Interrrupt. J13A: horizontal sync signal initiates interrrupt. J13B: horizontal sync signal HSYNC initiates interrupt. Link signal Interrrupt. Link TTXRQ signal Interrupt. Microconverter used with ADV7194 this link sets interface. This link must whenever Microconverter used with ADV7194. Microconverter used with ADV7194 this link sets interface. This link must whenever Microconverter used with ADV7194. When this link set, serial download power-up external Reset enabled. After downloading program this jumper must never inserted, otherwise ADuC program will lost forever.
Eval-ADV7194EB
ADuC812 MICROCONVERTER make moste efficient ADuC812s capacities, recommended consult datasheet ADuC812 Started Guide QuickStartDevelopment System V1.1 which software interface Microconverter. obtained from Analog Devices.
this application ADuC812 used load some presets, which controlled over Mode Control switch SW1:
ADV7194 :SWITCHES FUNCTIONALITIES
ON=> Oversampling OFF=>4x Oversampling
DATA COLOR BARS
NTSC
Switches used
ON=> 10-BIT Output OFF=> 8-BIT Output
YCbCr
order make this facility following instructions should followed: ADV7194EB connected over 25pin pixel port signal generator supplying valid CCIR601 data. Jumper J8B. disks supplied with ADV7194EB contain file called 94dem.asm. Double click ASM51.exe name path filename .asm file. message should come which reads: ASSEMBLY COMPLETE, ERRORS FOUND Connect 5pin connector (N.C. Insert jumper J18. Power-up board. This special cable provided requested from Analog Devices. Double click DEBUG812.exe. Under SESSION, click DEMO.SES. CONFIGURATION window, click FILES load compiled .lst .hex files 94dem.asm, that 94dem.lst 94dem.hex. Press RESET button board. Click RESET CONFIGURATION window. data will uploaded status should read: Data uploaded successfully. Click PROG icon ADuC812 Debugger. status should read: Data uploaded successfully. Click icon (next PROG). Load ADV7194 Evaluation Software. Cancel message which shows main window. Remove jumper press RESET evaluation board. switch settings will operate indicated above. Note, when setting individual switches other switches have
EVAL-ADV7194EB
ADV7194EB CONNECTIONS
GENERATOR

Evaluation Board ADV7194 Digital Video Encoder Eval-ADV7194EB Thi

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