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TMC2 2 0 9 1 /TMC2 2 1 9 1
Dig it a l Vid e o En c o d e rs /La ye rin g En g in e
• Controlled edge rates
• 3 power-down modes
Features
• All-digital video encoding
• Internal digital oscillators, no crystals required
• Multiple input formats supported
– 24-bit and 15-bit GBR/RGB
• 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
– YC C 422 or 444
B R
– 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)
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.
• 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)
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.
Logic Symbol
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.
BYPASS and OL
on TMC22191 only.
4:0
24
PD
23-0
6
CHROMA
LUNA
COMPOSITE
OL
4-0
PDC
VHSYNC
VVSYNC
KEY
V
REF
COMP
BYPASS
R
REF
8
TMC22x91
DIGITAL
VIDEO
CVBS
7-0
GHSYNC
GVSYNC
ENCODER
TDI
TMS
TCK
TDO
RESET
8
2
D
7-0
A
LDV
1-0
PXCK
CS
R/W
27008A
Rev. 1.1.0