- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375268 > ADV7129KS (ANALOG DEVICES INC) 192-Bit, 360 MHz True-Color Video DAC with Onboard PLL PDF資料下載
參數(shù)資料
| 型號： | ADV7129KS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顯示控制器 |
| 英文描述： | 192-Bit, 360 MHz True-Color Video DAC with Onboard PLL |
| 中文描述： | 2000 X 2000 PIXELS PALETTE-DAC DSPL CTLR, PQFP304 |
| 封裝： | PLASTIC, QFP-304 |
| 文件頁數(shù)： | 12/20頁 |
| 文件大?。?/td> | 389K |
| 代理商： | ADV7129KS |
ADV7129
–12–
REV. 0
COMMAND REGISTER 2 (CR2)
(Address Register (A10–A0) = 411H)
This register contains a number of control bits as shown in the
diagram. CR2 is an 8-bit wide register. CR27, CR24, CR22
and CR21 are reserved and should be set to logic “0.” Figure 8
shows the various operations under the control of CR2. This
register can be read from as well as written to.
COMMAND REGISTER 2-BIT DESCRIPTION
PLL Control (CR20)
This bit resets the PLL divider when set to logic “0” and re-
leases it when set to logic “1.”
SYNCOUT
Control (CR23)
This bit is an enable for SYNCOUT. If this bit is set to logic
“1,” the SENSE output becomes a pipelined version of
CSYNC
. Otherwise the SENSE output remains unaffected.
SENSE Bit (CR25)
This output bit is used to determine the absence of a CRT
monitor. When CR25 is set to logic “1,” a CRT is not present.
With some diagnostic code, the presence of loading on the indi-
vidual RGB lines can be determined. The reference is generated
by a voltage divider from the external voltage reference on the
V
RE
F
pin. For the proper operation, the following levels should
be applied to the comparator by the IOR, IOG and IOB outputs:
DAC Low Voltage
≤
250 mV.
DAC High Voltage
≥
450 mV.
VCO Override Bit (CR26)
This bit is used to override the VCO and set the PLL to the
lowest frequency possible. If the external LOADIN source takes
some time before it reaches its required frequency, the internal
PLL can become unstable as it tries to track to a varying
LOADIN signal. The VCO override bit can be set to logic level
“0” and then released (set to logic level “1”) to allow the VCO
to track to the input after it has stabilized. It is required to allow
200
μ
s before the VCO override bit is released.
GAIN ERROR REGISTERS
(Address Register (A10–A0) = 405H–407H)
The Red, Green and Blue Gain Error Registers allow the user to
compensate for any channel-to-channel variations in the video
output system. They control internal resistors from each of the
three DAC outputs to GND, i.e., they appear in parallel with
the external termination resistor across the DAC outputs. This
allows the RGB output voltages to be adjusted as the value of
R
INT
is varied. A logic “1” on any of the control bits GR06 to
GR00 switches in the appropriate resistor. A logic “0” disables
or open circuits the resistor. Bit GR07 of the Gain Error
Register enables or disables the Gain Error Adjust. Figure 9
shows the typical resistor values for these internal resistances
versus R
SET
.
CR27
CR26
CR25
CR24
CR23
CR22
CR21
CR20
SENSE OUTPUT
0
MONITOR
PRESENT
MONITOR
NOT PRESENT
1
CR25
SYNCOUT CONTROL
0
1
IGNORE
DECODE
CR23
RESERVED
(CR27)
THIS BIT SHOULD BE
SET TO LOGIC “0”
VCO OVERRIDE
0
1
VCO OVERRIDE
NORMAL PLL
OPERATION
CR26
RESERVED
(CR24)
THIS BIT SHOULD BE
SET TO LOGIC “0”
RESERVED
(CR22, CR21)
THESE BITS SHOULD BE
SET TO LOGIC “0”
PLL RESET
0
1
RESET PLL
RELEASE PLL
CR20
Figure 8. Command Register 2
x
x
x
x
x
x
x
1
GAIN ERROR REGISTER
R
SET
DACs
R
6
R
5
R
4
R
3
R
2
R
1
R
0
INTERNAL RESISTORS
I
OUT
PIN
R
T1
R
T2
GR06 R6
GR05 R5
GR04 R4
GR03 R3
GR02 R2
GR01 R1
GR00 R0
47
923
1926
3476
6979
16610
27037
REGISTER
(RESET = 280
)
(CABLE)
(MONITOR)
GR07
GR06
GR05
GR04
GR03
GR02
GR01
GR00
GCONTROL
0 DISABLE GAIN ERROR ADJ
1
ENABLE GAIN ERROR ADJ
GR07
Figure 9. Gain Error Register
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADV7129 | 192-Bit, 360 MHz True-Color Video DAC with Onboard PLL(192位,360MHz,真彩色視頻D/A轉(zhuǎn)換器) |
| ADV7150LS85 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7150LS110 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7150LS135 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7150LS170 | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV7141KP35 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| ADV7141KP50 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADV7141KP66 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| ADV7146KN35 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADV7146KN50 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復。