a
CMOS 220 MHz True-Color Graphics
Triple 10-Bit Video RAM-DAC
ADV7152
FEATURES
220 MHz, 24-Bit (30-Bit Gamma Corrected) True Color
Triple 10-Bit “Gamma Correcting” D/A Converters
Triple 256 ؋ 10 (256 ؋ 30) Color Palette RAM
On-Chip Clock Control Circuit
Palette Priority Select Registers
RS-343A/RS-170 Compatible Analog Outputs
TTL Compatible Digital Inputs
Standard MPU l/O Interface
10-Bit Parallel Structure
8+2 Byte Structure
Programmable Pixel Port: 24-Bit and 8-Bit (Pseudo)
Pixel Data Serializer
Multiplexed Pixel Input Ports; 1:1, 2:1
+5 V CMOS Monolithic Construction
100-Lead Plastic Quad Flatpack (QFP)
Thermally Enhanced to Achieve JC < 1.0؇C/W
OBS
APPLICATIONS
High Resolution, True Color Graphics
Professional Color Prepress Imaging
GENERAL DESCRIPTION
The ADV7152 (ADV®) is a complete analog output, Video
RAM-DAC on a single CMOS monolithic chip. The part is specifically designed for use in high performance, color graphics
workstations. The ADV7152 integrates a number of graphic
functions onto one device allowing 24-bit direct True-Color operation at the maximum screen update rate of 220 MHz. The
ADV7152 implements 30-bit True Color in 24-bit frame buffer
designs. The part also supports other modes, including 15-bit
True Color and 8-bit Pseudo or Indexed Color. Either the Red,
Green or Blue input pixel ports can be used for Pseudo Color.
OLE
The device consists of three, high speed, 10-bit, video D/A converters (RGB), three 256 ϫ 10 (one 256 ϫ 30) color look-up
tables, palette priority selects, a pixel input data multiplexer/
serializer and a clock generator/divider circuit. The ADV7152
implements 1:1 and 2:1 pixel data multiplexing. The onboard
palette priority select inputs enable multiple palette devices to
be connected together for use in multipalette and window
(Continued on page 10)
MODES OF OPERATION
24-Bit True Color (30-Bit Gamma Corrected)
@ 220 MHz
@ 170 MHz
@ 135 MHz
@ 110 MHz
@ 85 MHz
ADV is a registered trademark of Analog Devices, Inc.
8-Bit Pseudo Color
15-Bit True Color
FUNCTIONAL BLOCK DIAGRAM
TE
VAA
256-COLOR/GAMMA
PALETTE RAM
RED (R0–R7),
GREEN (G0–G7),
BLUE (B0–B7)
COLOR DATA
A
24
B
PALETTE
SELECTS
(PS0, PS1)
4
10
RED
256 x 10
24
P
I
X
E
L
P
O
R
T
10-BIT
RED DAC
IOR
10-BIT
GREEN DAC
IOG
10-BIT
BLUE DAC
IOB
GREEN
256 x 10
8
MUX
2:1
8
BLUE
256 x 10
10
10
2
MUX
2:1
CONTROL REGISTERS
PRGCKOUT
SCKIN
SCKOUT
CLOCK DIVIDE
&
SYNCHRONIZATION
CIRCUIT
PIXEL MASK
REGISTER
÷32, ÷16, ÷8, ÷4, ÷2
ADDRESS
REGISTER
ADDR
(A0-–A15)
IOG
IOB
SYNC
OUTPUT
CLOCK CONTROL
LOADIN
LOADOUT
IOR
8
48
4
ADV7152
COMMAND
REGISTERS
(CR1-CR3)
TEST
REGISTERS
MODE
REGISTER
(MR1)
REVISION
REGISTER
ID
REGISTER
DATA TO
PALETTES
30
RED
REGISTER
IPLL
SYNCOUT
VOLTAGE
REFERENCE
CIRCUIT
VREF
RSET
COMP
COLOR REGISTERS
GREEN
REGISTER
BLUE
REGISTER
SYNC
BLANK
MPU PORT
CLOCK
CLOCK
ECL TO CMOS
10 (8+2)
CE R/W C0
C1
D9 – D0
GND
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703