[原创]MaximMAX92773.12GbpsGMSL串行－并行解决方案

Maxim公司的MAX9277/MAX9281是3.12Gbps吉比特多媒体串行连接(GMSL)串行化器,具有3/4数据链LVDS输入和CML串行输出可编程50Ω同轴电缆或100Ω屏蔽双绞线(STP)电缆驱动,104MHz带宽模式,支持1920x720p/60Hz显示,多种数据速率,串行比特绿高达3.12Gbps,6.25MHz-104MHz象素时钟,主要用在高分辨率汽车导航,百万象素照相机系统和后排娱乐系统.本文介绍了MAX9277/MAX9281主要特性,框图,典型应用电路以及MAX9277/MAX9281同轴电缆评估板主要特性,电路图,材料清单和PCB设计图.

The MAX9277/MAX9281 are 3.12Gbps Gigabit Multimedia Serial Link (GMSL) serializers with 3- or 4-data lane LVDS input (oLDI) and a CML serial output programmable for 50Ω coax or 100Ω shielded twisted pair (STP) cable drive. The MAX9281 has HDCP content protection but otherwise is the same as the MAX9277. The serializers pair with any GMSL deserializer capable of coax input. When programmed for STP output they are backward compatible with any GMSL deserializer. The output amplitude is programmable 100mV to 500mV single-ended (coax) or 100mV to 400mV differential (STP).

The audio channel supports L-PCM I²S stereo and up to eight channels of L-PCM in TDM mode. Sample rates of 32kHz to 192kHz are supported with sample depth up to 32 bits.

The embedded control channel operates at 9.6kbps to 1Mbps in UART-UART and UART-I²C modes, and up to 1Mbps in I²C-I²C mode. Using the control channel, a µC can program serializer, deserializer and peripheral device registers at any time, independent of video timing, and manage HDCP operation (MAX9281). A GPO output supports touch-screen controller interrupt requests from the remote end of the link.

For use with longer cables, the serializers have programmable pre/deemphasis. Programmable spread spectrum is available on the serial output. The serial output meets ISO 10605 and IEC61000-4-2 ESD standards. The core supply is 1.7 to 1.9V and the I/O supply is 1.7 to 3.6V. The package is a lead-free, 48-pin, 7mm x 7mm TQFN with exposed pad and 0.5mm lead pitch.

MAX9277主要特性:

Ideal for High-Definition Video Applications
Drives Low-Cost 50Ω Coax Cable and FAKRA Connectors or 100Ω STP
104MHz High-Bandwidth Mode Supports 1920x720p/60Hz Display With 24-Bit Color
Serializer Pre/Deemphasis Allows 15m Cable at Full Speed
Up to 192kHz Sample Rate and 32-Bit Sample Depth For 7.1 Channel HD Audio
Multiple Data Rates for System Flexibility
Up to 3.12Gbps Serial-Bit Rate
6.25MHz to 104MHz Pixel Clock
9.6kbps to 1Mbps Control Channel in UART, Mixed UART/I²C, or I²C Mode with Clock Stretch Capability
Reduces EMI and Shielding Requirements
Serial Output Programmable for 100mV to 500mV Single-Ended or 100mV to 400mV Differential
Programmable Spread Spectrum Reduces EMI
Bypassable Input PLL for Pixel Clock Jitter Attenuation
Tracks Spread Spectrum on Input
High-Immunity Mode for Maximum Control-Channel Noise Rejection
Peripheral Features for System Power-Up and Verification
Built-In PRBS Generator for BER Testing of the Serial Link
Programmable Choice of 9 Default Device Addresses
Dedicated “Up/Down” GPO for Touch-Screen Interrupt and Other Uses
Remote/Local Wake-Up from Sleep Mode
Meets Rigorous Automotive and Industrial Requirements
-40℃ to +105℃ Operating Temperature
8kV Contact and 15kV Air ISO 10605 and IEC 61000-4-2 ESD Protection

MAX9277/MAX9281应用:

High-Resolution Automotive Navigation
Megapixel Camera Systems
Rear-Seat Infotainment

图1.MAX9277框图

图2.MAX9277典型应用电路

MAX9277/MAX9281同轴电缆评估板

The MAX9277/MAX9281 coax evaluation kits (EV kit)provide a proven design to evaluate the MAX9277 andMAX9281 high-bandwidth gigabit multimedia serial link(GMSL) serializers with spread spectrum and full-duplexcontrol channel with the use of a standard FAKRAcoaxial cable. The EV kit also includes Windows XP®-,Windows Vista®-, and Windows 7-compatible softwarethat provides a simple graphical user interface (GUI) for exercising features of the device. The EV kit comes witha MAX9277GTM+ or MAX9281GTM+ installed.

For complete GMSL evaluation using a standardFAKRA coax cable, order the MAX9277 or MAX9281coax EV kit and a companion deserializer board(MAX9276A or MAX9280A coax EV kit referenced in thisdocument). For evaluating with STP cable, also order the MAXCOAX2STP-HSD adapter kit and refer to its datasheet. Only one adapter kit is required per link, connectingthe serializer and deserializer (SerDes) boards.

MAX9277/MAX9281同轴电缆评估板主要特性:

●● Accepts 4-Channel LVDS or 24-Bit/32-Bit ParallelVideo
●● Windows XP-, Windows Vista-, and Windows7-Compatible Software
●● USB-PC Connection (Cable Included)
●● USB Powered
●● Proven PCB Layout
●● Fully Assembled and Tested

图3.MAX9277/MAX9281评估板:串行化器开关跳线图

图4. MAX9277/MAX9281评估板:并行化器开关跳线图

图5. MAX9277/MAX9281评估板电路图(1)

图6. MAX9277/MAX9281评估板电路图(2)

图7. MAX9277/MAX9281评估板电路图(3)

图8. MAX9277/MAX9281评估板电路图(4)

图9. MAX9277/MAX9281评估板电路图(5)
MAX9277/MAX9281评估板材料清单:





图10. MAX9277/MAX9281评估板PCB设计图(1)

图11. MAX9277/MAX9281评估板PCB设计图(2)

图12. MAX9277/MAX9281评估板PCB设计图(3)

图13. MAX9277/MAX9281评估板PCB设计图(4)

图14. MAX9277/MAX9281评估板PCB设计图(5)

图15. MAX9277/MAX9281评估板PCB设计图(6)
详情请见:
http://datasheets.maximintegrated.com/en/ds/MAX9277-MAX9281.pdf
和http://datasheets.maximintegrated.com/en/ds/MAX9277COAXEVKIT-MAX9281COAXEVKIT.pdf
MAX9277-MAX9281.pdf
MAX9277COAXEVKIT-MAX9281COAXEVKIT.pdf