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| 型号： | ADV3002BSTZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/28页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HDMI/DVI 4:1 80-LQFP |
| 产品变化通告： | Marking Change 25/Mar/2009 |
| 标准包装： | 1,000 |
| 功能： | 开关 |
| 电路： | 1 x 4:1 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 3.6 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 80-LQFP |
| 供应商设备封装： | 80-LQFP（14x14） |
| 包装： | 带卷 (TR) |
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ADV3002
Rev. B | Page 16 of 28
CEC BUFFER
The CEC buffer is bidirectional and includes integrated on-chip
pull-up resistors. The CEC buffer isolates capacitance from the
PCB and local system microcontroller, which is particularly
advantageous in systems where the microcontroller is not placed
near the HDMI connectors. The integrated on-chip pull-up
resistors are connected to an internal 3.3 V supply that is generated
from the AMUXVCC supply; thus, the CEC buffer is fully compliant
with the CEC line degradation specifications, when the local
system power supply is either on or off.
HOT PLUG DETECT CONTROL
The HPD lines going into the ADV3002 are normally high
impedance but are pulled low for greater than 100 ms when a
channel switch occurs. This pull-down pulse width can be
changed by modifying the value in the hot plug detect pulse
width control register (Register 0x05), as shown in Table 10.
Also, the HPD pulse can be manually controlled using the hot
plug detect manual override control register (Register 0x06), as
shown in Table 10.
LOSS OF SIGNAL DETECT
The TMDS clock line of each HDMI input has a loss of signal
(LOS) monitor attached to it. The purpose of the LOS monitor
is to determine if there is activity in the HDMI link. A simplified
circuit diagram of the LOS detector is shown in Figure 31. The
LOS monitors are disabled by default. The LOS monitors can be
enabled by programming the LOS_EN bit of the LOS detect control
register (Register 0x07). When enabled, the status of each HDMI
input can be read in the LOS detect status register (Register 0x10).
A logic high LOS_STATUS bit of a given HDMI input indicates
an inactive input; a logic low LOS_STATUS bit indicates an
active input. Three conditions need to be fulfilled for an HDMI
input to be considered active:
The TMDS input termination resistors must be enabled. By
default, the ADV3002 TMDS input termination resistors
are enabled only on the selected input.
The TMDS clock frequency exceeds the frequency cutoff
(LOS_FC). Refer to Table 1 for the value of the LOS frequency
cutoff.
TMDS clock differential amplitude exceeds the LOS threshold
set in the LOS detect control register (Register 0x07). Refer
to Table 1 for the value of the LOS amplitude threshold.
FREQUENCY
DETECTOR
AMPLITUDE
DETECTOR
TMDS CLOCK
INPUT[x]
0
1
FD
LOS_FC
0
1
AD
LOS_THR
LOS_STATUS[3:0]
07905-
0
1
Figure 31. Loss of Signal Detect Simplified Circuit Diagram
LOS Autosquelch
The LOS detect circuit can be used to automatically disable the
TMDS signal path. Setting the LOS_RX_EN bit in the LOS
control register (Register 0x07) causes the selected TMDS input
to be disabled when an LOS event occurs on that input. In this
case, the TMDS signal path is enabled when the active signal
conditions previously listed are met.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADV3002-EVALZ | 制造商:AD 制造商全称:Analog Devices 功能描述:4:1 HDMI/DVI Switch with Equalization, DDC/CEC Buffers and EDID Replication |
| ADV3002XSTZ | 功能描述:IC SWITCH HDMI/DVI 4:1 80LQFP 制造商:analog devices inc. 系列:- 包装:托盘 零件状态:上次购买时间 类型:视频开关 应用:HDTV，投影仪，机顶盒 安装类型:- 封装/外壳:- 供应商器件封装:- 标准包装:1 |
| ADV3002XSTZ-RL | 功能描述:IC SWITCH HDMI/DVI 4:1 80LQFP 制造商:analog devices inc. 系列:- 包装:带卷（TR） 零件状态:上次购买时间 类型:视频开关 应用:HDTV，投影仪，机顶盒 安装类型:- 封装/外壳:- 供应商器件封装:- 标准包装:1 |
| ADV3003 | 制造商:AD 制造商全称:Analog Devices 功能描述:HDMI/DVI TMDS Equalizer |
| ADV3003ACPZ | 功能描述:IC EQUALZR HDMI/DVI TMDS 40LFCSP RoHS:是 类别:集成电路 (IC) >> 接口 - 专用 系列:- 特色产品:NXP - I2C Interface 标准包装:1 系列:- 应用:2 通道 I²C 多路复用器 接口:I²C，SM 总线 电源电压:2.3 V ~ 5.5 V 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:剪切带 (CT) 安装类型:表面贴装 产品目录页面:825 (CN2011-ZH PDF) 其它名称:568-1854-1 |
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