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TMB22153AMS100

Demonstration Board for the TMC22x5yA Multistandard Digital Video Decoder

Fairchild Semiconductor 

TMB22153AMS100

PRELIMINARY INFORMATION

Functional Description

The TMB22153AMS100 is designed to demonstrate the

performance of the TMC22x5yA Digital Video Decoder. For

complete descriptions of the TMC22x5yA, TMC2072,

TMC1185, and TMC2242 please refer to part datasheets.

The TMB22153AMS100 is designed to be used in

conjunction with other Fairchild demo boards, namely the

TMC2069P7C DAC, and TMB2193MS100 encoder boards.

The 96 pin edge connectors plug easily into each other.

When used together, the boards demonstrate a high

performance 10-bit digital video decoding system.

TMC22x5yA Digital Video Decoder

The TMC22x5yA accepts digitized video input on two

10-bit buses, “YOVER[9:0]” and “COVER[9:0]”. Based on

the status of its control registers, it then outputs the data to

the output edge connector of the board in a variety of

formats. Please see Table 1 for a listing of board default

video standards and output formats that are loadable to the

control registers.

After the TMC22x5yA control registers have been initially

loaded by the microcontroller, subsequent changes to the

control registers may be made through the R-bus interface

and Raydemo software.

It is important that the control registers be loaded correctly in

order to obtain the desired output. Once the control registers

have been set to output the correct data from the

TMC22x5yA, then several board switches must also be

correctly configured in order to obtain the desired output.

TMC2072 Genlocking Video Digitizer

The TMC2072 Genlocking Video Digitizer accepts analog

composite data through the composite input BNC on the left

side of the board. A 20MHz clock crystal provides the Gen-

lock with an input clock. The TMC2072 outputs horizontal

and vertical syncs, and a 27MHz clock. The clock is used to

drive the Decoder and EPLD. Like the TMC22x5yA, the

Genlock part must be programmed at startup. Instructions on

how to do this are in the “Microcontroller” section of this

documentation.

EPLD

An Altera EPF10K10TC144-4 EPLD executes several

essential board functions. The EPLD serves as a buffer and

multiplexer for data buses and a register for several impor-

tant control signals. These signals may be cross-referenced

to the included schematics. The EPLD control registers may

be modified using the Raydemo software. The Raydemo

EPLD R-bus address is 0000001. For a more complete

description or specification of signals going to or coming

from the TMC22x5yA and TMC2072, please refer to the

Fairchild Semiconductor Data Book (also available on CD-

ROM) or the website at www.fairchildsemi.com.

Microcontroller

An Atmel 89C55 microcontroller is used to program the

TMC22x5yA and TMC2072 registers. The microcontroller

programs the parts through the R-bus at power up and repro-

grams them each time the “Reset” button is pushed. Please

see Table 1 on the next page for a description of available

microcontroller-programmed board configurations.

Table 1. TMB22153AMS100 Demonstration Board Video Standard Selection

P3-0

0000

Input Format

composite

Video Standard

NTSC

0001

Y/C

NTSC

0010

composite

NTSC

0011

Y/C

NTSC

0100

composite

NTSC

0101

composite, field-based

NTSC

0110

composite, field-based

NTSC

0111

composite, frame-based

NTSC

1000

composite

PAL

1001

Y/C

PAL

1010

composite

PAL

1011

Y/C

PAL

1100

composite

PAL

1101

composite, field-based

PAL

1110

composite, field-based

PAL

1111

reserved

Output Format

YUV

YUV

D1

D1

RGB

YUV

D1

YUV

YUV

YUV

D1

D1

RGB

YUV

D1

2

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