www.cadeka.com
TMC22091/TMC22191
Digital Video Encoders/Layering Engine
Features
• All-digital video encoding
• Internal digital oscillators, no crystals required
• Multiple input formats supported
– 24-bit and 15-bit GBR/RGB
– YC
B
C
R
422 or 444
– Color indexed
• 30 overlay colors (TMC22191)
• Fully programmable timing
• Supports input pixel rates of 10 to 15 Mpps
• 256 x 8 x 3 color look-up tables (bypassable on
TMC22191)
• 8-bit mask register
• 8-bit composite digital video input
• Hardware and 24-bit data keying
• Synchronizes with TMC22071 Genlocking Video
Digitizer
• 8:8:8 video reconstruction
• SMPTE 170M NTSC or CCIR Report 624 PAL
compatible
• Supports PAL-M and NTSC without pedestal
• Simultaneous S-VIDEO (Y/C) NTSC/PAL output
• 10-bit D/A conversion (three channels)
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Controlled edge rates
3 power-down modes
Built-in color bars and modulated ramp test signals
JTAG (IEEE Std 1149.1-1990) test interface
Single +5V power supply
84 lead PLCC package
100 lead MQFP package
Description
The TMC22x91 digital video encoders convert digital com-
puter image or graphics data (in RGB, YCBCR, or color
indexed format) or a CCIR-601 signal into a standard analog
baseband television (NTSC or PAL) signal with a modulated
color subcarrier.
Both composite (single lead) and S-VIDEO (separate
chroma and luma) formats are active simultaneously at the
three analog output pins, each of which generates a standard
video-level signal into doubly-terminated 75Ω load.
The TMC22x91 accepts digitized video from the companion
TMC22071 Genlocking Video Digitizer. Soft switching
between video sources is done under either hardware or
programmable data control.
The TMC22191 offers 4-layer keying capability, bypassable
CLUT, and 30 Overlay colors.
The TMC22x91 is fabricated in a submicron CMOS process
and packaged in an 84 Lead Plastic Leadless Chip Carrier, or
in a 100 Lead Metric Quad Flat Pack. Performance is guar-
anteed from 0°C to 70°C.
Logic Symbol
BYPASS and OL4:0 on TMC22191 only.
PD23-0
FRAME BUFFER
INTERFACE
24
6
VIDEO
OUTPUT
OL4-0
PDC
VHSYNC
VVSYNC
KEY
BYPASS
CVBS7-0
GHSYNC
GVSYNC
CHROMA
LUNA
COMPOSITE
ANALOG
INTERFACE
GENLOCK
INTERFACE
8
TMC22x91
DIGITAL
VIDEO
ENCODER
V
REF
COMP
R
REF
JTAG TEST
INTERFACE
MICROPROCESSOR
INTERFACE
TDI
TMS
TCK
TDO
RESET
D7-0
A1-0
CS
R/W
8
2
CLOCKS
LDV
PXCK
27008A
Rev. 1.1.0
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
