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參數(shù)資料
| 型號： | TMDS261BPAG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | GREEN, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 27/49頁 |
| 文件大?。?/td> | 11321K |
| 代理商： | TMDS261BPAG |
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A DTV Supporting a Passive CEC Link
E-EDID Reading Configurations in Standby Mode
SINK
HPD1
SDA1
SCL1
A21/B11
A22/B12
A23/B13
A24/B14
HPD2
SDA2
SCL2
A21/B21
A22/B22
A23/B23
A24/B24
EQ
S1
S2
HPD_SINK
SDA_SINK
SCL_SINK
Y1/Z1
Y2/Z2
Y3/Z3
Y4/Z4
VSadj
VDD
(5V)
VCC
(3.3V)
GND
E-EDID
HDMI RX
DDC_SDA
DDC_SCL
Y1/Z1
Y2/Z2
Y3/Z3
Y4/Z4
5V
47kW
mController
3.3V
4.7kW
CEC
4.02kW 10%
1kW
HPD
5V
SDA
SCL
CEC
CLK
D0
D1
D2
HPD
5V
SDA
SCL
CEC
CLK
D0
D1
D2
HPD
5V
SDA
SCL
CEC
CLK
D0
D1
D2
SOURCE 1
HPD
5V
SDA
SCL
CEC
CLK
D0
D1
D2
SOURCE 2
www.ti.com .......................................................................................................................................................................................... SLLS987 – SEPTEMBER 2009
TMDS261B in different DTVs with different consumer electronic control (CEC) requirements. The CEC is an
optional feature of the HDMI interface for centralizing and simplifying user control instructions from multiple
audio/video products in an interconnected system, even when all the audio/video products are from different
manufacturers. This feature minimizes the number of remote controls in a system, as well as reducing the
number of times buttons must be pressed.
In Figure 46, the DTV does not have the capability of handling CEC signals, but allows CEC signals to pass over
the CEC bus. The source selection is done by the control command of the DTV. The user cannot force the
command from any audio/video product on the CEC bus. The selected source reads the E-EDID data after
receiving an asserted HPD signal. The microcontroller loads different CEC physical addresses while changing
the source by means of the S1 and S2 pins.
When the DTV system is in standby mode, the sources do not read the E-EDID memory because the 1-k
pulldown resistor keeping the HPD_SINK input at logic low forces all HPD pins to output logic-low to all sources.
The source does not read the E-EDID data with a low on HPD signal. However, if reading the E-EDID data in the
system standby mode is preferred, then TMDS261B can still support this need.
The recommended configuration sequences are:
1. Apply the same 3.3-V power to the VCC of TMDS261B and the TMDS line termination at the HDMI receiver.
2. Because the TMDS261B has clock-detect circuitry and there is no valid input TMDS clock in the standby
mode, TMDS261B draws significanty less current.
3. Set S1 and S2 to select the source port which is allowed to read the E-EDID memory.
Note that if the source has a time-out limitation between the 5-V and the HPD signals, the foregoing configuration
is not applicable. Uses individual EEPROMs assigned for each input port, see Figure 47 through Figure 49. The
solution uses E-EDID data to be readable during system power-off or standby-mode operations.
Figure 46. Two-Port HDMI-Enabled DTV With TMDS261B – CEC Commands Passing Through
Copyright 2009, Texas Instruments Incorporated
33
Product Folder Link(s) :TMDS261B
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| TMDS261BPAGR | 功能描述:視頻開關(guān) IC 2 to 1 HDMI switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| TMDS261PAG | 功能描述:視頻開關(guān) IC 2 to 1 HDMI Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| TMDS261PAGR | 功能描述:視頻開關(guān) IC 2 to 1 HDMI Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| TMDS28027USB | 功能描述:仿真器/模擬器 TMX320F28027 Piccolo controlSTICK RoHS:否 制造商:Blackhawk 產(chǎn)品:System Trace Emulators 工具用于評估:C6000, C5000, C2000, OMAP, DAVINCI, SITARA, TMS470, TMS570, ARM 7/9, ARM Cortex A8/R4/M3 用于:XDS560v2 |
| TMDS2MTRPFCKIT | 功能描述:電源管理IC開發(fā)工具 Dual Motor Control and PFC Dev Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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