BU1424K
BU1424K is NTSC / PAL digital RGB encoder manufactured by ROHM.
Features
- 1) Input clocks supported. 27.0 / 13.5MHz 28.636 / 14.318MHz 28.375 / 14.1875MHz 35.4695 / 17.73475MHz 2) 24-bit RGB and 16-bit YUV input signals are supported. 3) Both master and slave systems are supported. 4) 9-bit high-speed DAC is used for DAC output of posite VIDEO, Y, and C signals.
5) Internal 8-color OSD output function is provided. 6) FSC-TRAP on the Y channel can be turned on and off. 7) C channel is equipped with an internal chrominance band-pass filter in addition to the U,V. low-pass filter. 8) 5V single power supply, low power consumption. (0.4W typ.) 9) Y and C output can be turned off (the power consumption with Y and C off is 0.25W typ.).
Multimedia ICs
- Block diagram
OSDSW BOSD GOSD ROSD
RGB 24BITS OSD PALLET
RD GD / Y BD / UV
LATCH
RGB to YUV UV FILTER
Y-LEVEL SHIFT CHROMA GEN
Y-FILTER
MIX SIG and sync burst
DAC V Y C
VOUT YOUT COUT
C-FILTER
VOLK RSTB VIDEO TIMING CONTROL PIXCLK SYNC BLANK HSY SUB CARRIER BURST GENERATOR BURST VSY BCLK MODE CONTROL FIELD / FLAME CONTROL
YFILONB [1.0]
CDGSWB
TEST1,2
PAL60B
CLKSW
IM [0.1]
G4FSC
ADDH
Multimedia ICs
- Pin descriptions
Pin No. Pin name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 BOSD GD0 / Y0 GD1 / Y1 GD2 / Y2 GD3 / Y3 GD4 / Y4 GD5 / Y5 GD6 / Y6 GND GD7 / Y7 Function OSD BLUE DATA INPUT GREEN DATA Bit0 (LSB) GREEN DATA Bit1 GREEN DATA Bit2 GREEN DATA Bit3 GREEN DATA Bit4 GREEN DATA Bit5 GREEN DATA Bit6 DIGITAL GROUND GREEN DATA Bit7 (MSB) Pin No. Pin name Function SELECT MASTER / SLAVE + 0.5 /
- 0.5LINE at NON-INTER DAC BIAS CHROMA OUTPUT GROUND CHROMA OUTPUT posite Output Ground POSITE OUTPUT Analog Ground (DAC. VREF) ANALOG (DAC) VDD REFERENCE RESISTOR ANALOG (VREF) VDD Luminance Output Ground Luminance Output 4FSC / 3.2FSC at PALCD-G
∗1
33 34 35 36 37 38 39 40 41 42 43 44 45 46
SLABEB ADDH VREF-C CGND COUT VGND VOUT AVSS AVDD IR AVDD YGND YOUT C4FSC
∗1 ∗1
BD0 / UV0 BLUE DATA Bit0...
